1
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Stanciulescu LA, Vatasescu R. Ventricular Tachycardia Catheter Ablation: Retrospective Analysis and Prospective Outlooks-A Comprehensive Review. Biomedicines 2024; 12:266. [PMID: 38397868 PMCID: PMC10886924 DOI: 10.3390/biomedicines12020266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 01/16/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024] Open
Abstract
Ventricular tachycardia is a potentially life-threatening arrhythmia associated with an overall high morbi-mortality, particularly in patients with structural heart disease. Despite their pivotal role in preventing sudden cardiac death, implantable cardioverter-defibrillators, although a guideline-based class I recommendation, are unable to prevent arrhythmic episodes and significantly alter the quality of life by delivering recurrent therapies. From open-heart surgical ablation to the currently widely used percutaneous approach, catheter ablation is a safe and effective procedure able to target the responsible re-entry myocardial circuit from both the endocardium and the epicardium. There are four main mapping strategies, activation, entrainment, pace, and substrate mapping, each of them with their own advantages and limitations. The contemporary guideline-based recommendations for VT ablation primarily apply to patients experiencing antiarrhythmic drug ineffectiveness or those intolerant to the pharmacological treatment. Although highly effective in most cases of scar-related VTs, the traditional approach may sometimes be insufficient, especially in patients with nonischemic cardiomyopathies, where circuits may be unmappable using the classic techniques. Alternative methods have been proposed, such as stereotactic arrhythmia radioablation or radiotherapy ablation, surgical ablation, needle ablation, transarterial coronary ethanol ablation, and retrograde coronary venous ethanol ablation, with promising results. Further studies are needed in order to prove the overall efficacy of these methods in comparison to standard radiofrequency delivery. Nevertheless, as the field of cardiac electrophysiology continues to evolve, it is important to acknowledge the role of artificial intelligence in both the pre-procedural planning and the intervention itself.
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Affiliation(s)
- Laura Adina Stanciulescu
- Cardio-Thoracic Department, "Carol Davila" University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Cardiology Department, Clinical Emergency Hospital, 014461 Bucharest, Romania
| | - Radu Vatasescu
- Cardio-Thoracic Department, "Carol Davila" University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Cardiology Department, Clinical Emergency Hospital, 014461 Bucharest, Romania
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2
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Waks JW, Maher TR, d'Avila A. Improving substrate mapping for ventricular tachycardia with a novel peak frequency annotation algorithm: Deconstructing the abnormal electrogram. Heart Rhythm 2024; 21:34-35. [PMID: 38178590 DOI: 10.1016/j.hrthm.2023.10.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 10/25/2023] [Indexed: 01/06/2024]
Affiliation(s)
- Jonathan W Waks
- Harvard Thorndike Arrhythmia Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts.
| | - Timothy R Maher
- Harvard Thorndike Arrhythmia Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Andre d'Avila
- Harvard Thorndike Arrhythmia Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
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3
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van der Waal J, Meijborg V, Coronel R, Dubois R, Oostendorp T. Basis and applicability of noninvasive inverse electrocardiography: a comparison between cardiac source models. Front Physiol 2023; 14:1295103. [PMID: 38152249 PMCID: PMC10752226 DOI: 10.3389/fphys.2023.1295103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 11/30/2023] [Indexed: 12/29/2023] Open
Abstract
The body surface electrocardiogram (ECG) is a direct result of electrical activity generated by the myocardium. Using the body surface ECGs to reconstruct cardiac electrical activity is called the inverse problem of electrocardiography. The method to solve the inverse problem depends on the chosen cardiac source model to describe cardiac electrical activity. In this paper, we describe the theoretical basis of two inverse methods based on the most commonly used cardiac source models: the epicardial potential model and the equivalent dipole layer model. We discuss similarities and differences in applicability, strengths and weaknesses and sketch a road towards improved inverse solutions by targeted use, sequential application or a combination of the two methods.
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Affiliation(s)
- Jeanne van der Waal
- Department of Clinical and Experimental Cardiology, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Veronique Meijborg
- Department of Clinical and Experimental Cardiology, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Ruben Coronel
- Department of Clinical and Experimental Cardiology, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Rémi Dubois
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac, France
| | - Thom Oostendorp
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre, Nijmegen, Netherlands
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4
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Song X, Que D, Zhu Y, Yu W, Xu H, Zhang X, Yan J, Wang Y, Rui B, Yang Y, Zhuang Z, Huang G, Zhao X, Yang C, Cai Y, Yang P. Guiding ablation strategies for ventricular tachycardia in patients with structural heart disease by analyzing links and conversion patterns of traceable abnormal late potential zone. J Cardiovasc Electrophysiol 2023; 34:2273-2282. [PMID: 37694672 DOI: 10.1111/jce.16051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/19/2023] [Accepted: 08/26/2023] [Indexed: 09/12/2023]
Abstract
BACKGROUND Substrate-based ablation can treat uninducible or hemodynamically instability scar-related ventricular tachycardia (VT). However, whether a correlation exists between the critical VT isthmus and late activation zone (LAZ) during sinus rhythm (SR) is unknown. OBJECTIVE To demonstrate the structural and functional properties of abnormal substrates and analyze the link between the VT circuit and abnormal activity during SR. METHODS Thirty-six patients with scar-related VT (age, 50.0 ± 13.7 years and 86.1% men) who underwent VT ablation were reviewed. The automatic rhythmia ultrahigh resolution mapping system was used for electroanatomic substrate mapping. The clinical characteristics and mapping findings, particularly the LAZ characteristics during SR and VT, were analyzed. To determine the association between the LAZ during the SR and VT circuits, the LAZ was defined as five activation patterns: entrance, exit, core, blind alley, and conduction barrier. RESULTS Forty-five VTs were induced in 36 patients, 91.1% of which were monomorphic. The LAZ of all patients was mapped during the SR and VT circuits, and the consistency of the anatomical locations of the LAZ and VT circuits was analyzed. Using the ultrahigh resolution mapping system, interconversion patterns, including the bridge, T, puzzle, maze, and multilayer types, were identified. VT ablation enabled precise ablation of abnormal late potential conduction channels. CONCLUSION Five interconversion patterns of the LAZ during the SR and VT circuits were summarized. These findings may help formulate more precise substrate-based ablation strategies for scar-related VT and shorter procedure times.
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Affiliation(s)
- Xudong Song
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Dongdong Que
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Yingqi Zhu
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Wenjie Yu
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Haoran Xu
- Boston Scientific China, Shanghai, China
| | - Xiuli Zhang
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Jing Yan
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Yuxi Wang
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Bowen Rui
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Yashu Yang
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Zhenyu Zhuang
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Guanlin Huang
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Xiaoqing Zhao
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Chaobo Yang
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Yanbin Cai
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
| | - Pingzhen Yang
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- Heart Center of Zhujiang Hospital, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Guangzhou, China
- Heart Center of Zhujiang Hospital, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China
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5
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Thibert MJ, Odabashian R, Lepage-Ratte MF, Jones A, Alqarawi W, Nery PB, Nair GM, Davis DR, Golian M, Redpath CJ, Hansom S, Ramirez FD, Aydin A, Klein A, Green MS, Birnie DH, Sadek MM. How much endocardial scar homogenization is required for successful ablation of ischemic ventricular tachycardia? Heart Rhythm 2023; 20:1418-1419. [PMID: 37468027 DOI: 10.1016/j.hrthm.2023.07.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/27/2023] [Accepted: 07/13/2023] [Indexed: 07/21/2023]
Affiliation(s)
- Michael J Thibert
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Roupen Odabashian
- Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Alecia Jones
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Wael Alqarawi
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada; Department of Cardiac Sciences, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Pablo B Nery
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Girish M Nair
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Darryl R Davis
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Mehrdad Golian
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Calum J Redpath
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Simon Hansom
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - F Daniel Ramirez
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Alper Aydin
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Andres Klein
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Martin S Green
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - David H Birnie
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Mouhannad M Sadek
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada; Division of Cardiology, Southlake Regional Health Centre, Newmarket, Ontario, Canada.
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6
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Martignani C. Left-Side Ventricular Tachycardia Localization Made Simpler by Automatic 3-Lead Localization and Pace Mapping: When Less Is More. Can J Cardiol 2023; 39:1417-1420. [PMID: 37437839 DOI: 10.1016/j.cjca.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/14/2023] Open
Affiliation(s)
- Cristian Martignani
- Cardiology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.
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7
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Kowalewski C, Ascione C, Nuñez-Garcia M, Ly B, Sermesant M, Bustin A, Sridi S, Bouteiller X, Yokoyama M, Vlachos K, Monaco C, Bouyer B, Buliard S, Arnaud M, Tixier R, Chauvel R, Derval N, Pambrun T, Duchateau J, Bordachar P, Hocini M, Hindricks G, Haïssaguerre M, Sacher F, Jais P, Cochet H. Advanced Imaging Integration for Catheter Ablation of Ventricular Tachycardia. Curr Cardiol Rep 2023; 25:535-542. [PMID: 37115434 DOI: 10.1007/s11886-023-01872-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/23/2023] [Indexed: 04/29/2023]
Abstract
PURPOSE OF REVIEW Imaging plays a crucial role in the therapy of ventricular tachycardia (VT). We offer an overview of the different methods and provide information on their use in a clinical setting. RECENT FINDINGS The use of imaging in VT has progressed recently. Intracardiac echography facilitates catheter navigation and the targeting of moving intracardiac structures. Integration of pre-procedural CT or MRI allows for targeting the VT substrate, with major expected impact on VT ablation efficacy and efficiency. Advances in computational modeling may further enhance the performance of imaging, giving access to pre-operative simulation of VT. These advances in non-invasive diagnosis are increasingly being coupled with non-invasive approaches for therapy delivery. This review highlights the latest research on the use of imaging in VT procedures. Image-based strategies are progressively shifting from using images as an adjunct tool to electrophysiological techniques, to an integration of imaging as a central element of the treatment strategy.
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Affiliation(s)
- Christopher Kowalewski
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France.
| | - Ciro Ascione
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Marta Nuñez-Garcia
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Buntheng Ly
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Maxime Sermesant
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Aurélien Bustin
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Soumaya Sridi
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Xavier Bouteiller
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Masaaki Yokoyama
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Konstantinos Vlachos
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Cinzia Monaco
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Benjamin Bouyer
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Samuel Buliard
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Marine Arnaud
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Romain Tixier
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Remi Chauvel
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Nicolas Derval
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Thomas Pambrun
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Josselin Duchateau
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Pierre Bordachar
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Mélèze Hocini
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Gerhard Hindricks
- Department of Cardiology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Michel Haïssaguerre
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Frédéric Sacher
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Pierre Jais
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
| | - Hubert Cochet
- Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'Institut de RYthmologie et modélisation Cardiaque (LIRYC), Université Bordeaux, Bordeaux, France
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8
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Xu L, Zahid S, Khoshknab M, Moss J, Berger RD, Chrispin J, Callans D, Marchlinski FE, Zimmerman SL, Han Y, Desjardins B, Trayanova N, Nazarian S. Lipomatous metaplasia prolongs repolarization and increases repolarization dispersion within post-infarct ventricular tachycardia circuit cites. Europace 2023; 25:496-505. [PMID: 36519747 PMCID: PMC9935002 DOI: 10.1093/europace/euac222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 10/20/2022] [Indexed: 12/23/2022] Open
Abstract
AIMS Post-infarct myocardium contains viable corridors traversing scar or lipomatous metaplasia (LM). Ventricular tachycardia (VT) circuitry has been separately reported to associate with corridors that traverse LM and with repolarization heterogeneity. We examined the association of corridor activation recovery interval (ARI) and ARI dispersion with surrounding tissue type. METHODS AND RESULTS The cohort included 33 post-infarct patients from the prospective Intra-Myocardial Fat Deposition and Ventricular Tachycardia in Cardiomyopathy (INFINITY) study. We co-registered scar and corridors from late gadolinium enhanced magnetic resonance, and LM from computed tomography with intracardiac electrogram locations. Activation recovery interval was calculated during sinus or ventricular pacing, as the time interval from the minimum derivative within the QRS to the maximum derivative within the T-wave on unipolar electrograms. Regional ARI dispersion was defined as the standard deviation (SD) of ARI per AHA segment (ARISD). Lipomatous metaplasia exhibited higher ARI than scar [325 (interquartile range 270-392) vs. 313 (255-374), P < 0.001]. Corridors critical to VT re-entry were more likely to traverse through or near LM and displayed prolonged ARI compared with non-critical corridors [355 (319-397) vs. 302 (279-333) ms, P < 0.001]. ARISD was more closely associated with LM than with scar (likelihood ratio χ2 50 vs. 12, and 4.2-unit vs. 0.9-unit increase in 0.01*Log(ARISD) per 1 cm2 increase per AHA segment). Additionally, LM and scar exhibited interaction (P < 0.001) in their association with ARISD. CONCLUSION Lipomatous metaplasia is closely associated with prolonged local action potential duration of corridors and ARI dispersion, which may facilitate the propensity of VT circuit re-entry.
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Affiliation(s)
- Lingyu Xu
- Cardiovascular Medicine Division, University of Pennsylvania School of Medicine, 3400 Spruce Street, Philadelphia, PA 19104, USA
| | - Sohail Zahid
- Department of Internal Medicine, NYU Langone Medical Center, New York, NY, USA
| | - Mirmilad Khoshknab
- Cardiovascular Medicine Division, University of Pennsylvania School of Medicine, 3400 Spruce Street, Philadelphia, PA 19104, USA
| | - Juwann Moss
- Cardiovascular Medicine Division, University of Pennsylvania School of Medicine, 3400 Spruce Street, Philadelphia, PA 19104, USA
| | - Ronald D Berger
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
- Department of Cardiology, Johns Hopkins University, Baltimore, MD, USA
| | - Jonathan Chrispin
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
- Department of Cardiology, Johns Hopkins University, Baltimore, MD, USA
| | - David Callans
- Cardiovascular Medicine Division, University of Pennsylvania School of Medicine, 3400 Spruce Street, Philadelphia, PA 19104, USA
| | - Francis E Marchlinski
- Cardiovascular Medicine Division, University of Pennsylvania School of Medicine, 3400 Spruce Street, Philadelphia, PA 19104, USA
| | - Stefan L Zimmerman
- Department of Radiology and Radiological Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Yuchi Han
- Cardiovascular Medicine Division, University of Pennsylvania School of Medicine, 3400 Spruce Street, Philadelphia, PA 19104, USA
| | - Benoit Desjardins
- Department of Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Natalia Trayanova
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Saman Nazarian
- Cardiovascular Medicine Division, University of Pennsylvania School of Medicine, 3400 Spruce Street, Philadelphia, PA 19104, USA
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9
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Vlachos K, Letsas KP, Srinivasan NT, Frontera A, Efremidis M, Dragasis S, Martin CA, Martin R, Nakashima T, Bazoukis G, Kitamura T, Mililis P, Saplaouras A, Georgopoulos S, Sofoulis S, Kariki O, Koskina S, Takigawa M, Sacher F, Jais P, Santangeli P. The value of functional substrate mapping in ventricular tachycardia ablation. Heart Rhythm O2 2023; 4:134-146. [PMID: 36873315 PMCID: PMC9975018 DOI: 10.1016/j.hroo.2022.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
In the setting of structural heart disease, ventricular tachycardia (VT) is typically associated with a re-entrant mechanism. In patients with hemodynamically tolerated VTs, activation and entrainment mapping remain the gold standard for the identification of the critical parts of the circuit. However, this is rarely accomplished, as most VTs are not hemodynamically tolerated to permit mapping during tachycardia. Other limitations include noninducibility of arrhythmia or nonsustained VT. This has led to the development of substrate mapping techniques during sinus rhythm, eliminating the need for prolonged periods of mapping during tachycardia. Recurrence rates following VT ablation are high; therefore, new mapping techniques for substrate characterization are required. Advances in catheter technology and especially multielectrode mapping of abnormal electrograms has increased the ability to identify the mechanism of scar-related VT. Several substrate-guided approaches have been developed to overcome this, including scar homogenization and late potential mapping. Dynamic substrate changes are mainly identified within regions of myocardial scar and can be identified as local abnormal ventricular activities. Furthermore, mapping strategies incorporating ventricular extrastimulation, including from different directions and coupling intervals, have been shown to increase the accuracy of substrate mapping. The implementation of extrastimulus substrate mapping and automated annotation require less extensive ablation and would make VT ablation procedures less cumbersome and accessible to more patients.
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Affiliation(s)
- Konstantinos Vlachos
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
- Address reprint requests and correspondence: Dr Konstantinos Vlachos, Onassis Cardiac Surgery Center, Electrophysiology Department, Syggrou Avenue 356, PC 176 74, Athens, Greece.
| | | | - Neil T. Srinivasan
- Department of Cardiac Electrophysiology, Essex Cardiothoracic Centre, Basildon, United Kingdom
- Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom
| | - Antonio Frontera
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Michael Efremidis
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Stelios Dragasis
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Claire A. Martin
- Department of Basic and Clinical Sciences, University of Nicosia Medical School, Nicosia, Cyprus
| | - Ruaridh Martin
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Takashi Nakashima
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - George Bazoukis
- Department of Basic and Clinical Sciences, University of Nicosia Medical School, Nicosia, Cyprus
- Department of Cardiology, Larnaca General Hospital, Larnaca, Cyprus
| | - Takeshi Kitamura
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Panagiotis Mililis
- Laboratory of Cardiac Electrophysiology, General Hospital of Athens Evangelismos, Athens, Greece
| | | | - Stamatios Georgopoulos
- Laboratory of Cardiac Electrophysiology, General Hospital of Athens Evangelismos, Athens, Greece
| | - Stamatios Sofoulis
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Ourania Kariki
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Stavroula Koskina
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Masateru Takigawa
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Frédéric Sacher
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Pierre Jais
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Pasquale Santangeli
- Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
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10
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Pandozi C, Mariani MV, Chimenti C, Maestrini V, Filomena D, Magnocavallo M, Straito M, Piro A, Russo M, Galeazzi M, Ficili S, Colivicchi F, Severino P, Mancone M, Fedele F, Lavalle C. The scar: the wind in the perfect storm-insights into the mysterious living tissue originating ventricular arrhythmias. J Interv Card Electrophysiol 2023; 66:27-38. [PMID: 35072829 PMCID: PMC9931863 DOI: 10.1007/s10840-021-01104-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 12/27/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Arrhythmic death is very common among patients with structural heart disease, and it is estimated that in European countries, 1 per 1000 inhabitants yearly dies for sudden cardiac death (SCD), mainly as a result of ventricular arrhythmias (VA). The scar is the result of cardiac remodelling process that occurs in several cardiomyopathies, both ischemic and non-ischemic, and is considered the perfect substrate for re-entrant and non-re-entrant arrhythmias. METHODS Our aim was to review published evidence on the histological and electrophysiological properties of myocardial scar and to review the central role of cardiac magnetic resonance (CMR) in assessing ventricular arrhythmias substrate and its potential implication in risk stratification of SCD. RESULTS Scarring process affects both structural and electrical myocardial properties and paves the background for enhanced arrhythmogenicity. Non-uniform anisotropic conduction, gap junctions remodelling, source to sink mismatch and refractoriness dispersion are some of the underlining mechanisms contributing to arrhythmic potential of the scar. All these mechanisms lead to the initiation and maintenance of VA. CMR has a crucial role in the evaluation of patients suffering from VA, as it is considered the gold standard imaging test for scar characterization. Mounting evidences support the use of CMR not only for the definition of gross scar features, as size, localization and transmurality, but also for the identification of possible conducting channels suitable of discrete ablation. Moreover, several studies call out the CMR-based scar characterization as a stratification tool useful in selecting patients at risk of SCD and amenable to implantable cardioverter-defibrillator (ICD) implantation. CONCLUSIONS Scar represents the substrate of ventricular arrhythmias. CMR, defining scar presence and its features, may be a useful tool for guiding ablation procedures and for identifying patients at risk of SCD amenable to ICD therapy.
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Affiliation(s)
- C. Pandozi
- grid.416357.2Department of Cardiology, San Filippo Neri Hospital, Rome, Italy
| | - Marco Valerio Mariani
- Department of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences "Sapienza" University of Rome, Viale del Policlinico 155, 00161, Rome, Italy.
| | - C. Chimenti
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - V. Maestrini
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - D. Filomena
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - M. Magnocavallo
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - M. Straito
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - A. Piro
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - M. Russo
- grid.416357.2Department of Cardiology, San Filippo Neri Hospital, Rome, Italy
| | - M. Galeazzi
- grid.416357.2Department of Cardiology, San Filippo Neri Hospital, Rome, Italy
| | - S. Ficili
- ASP, Ragusa Maggiore Hospital, Modica, Italy
| | - F. Colivicchi
- grid.416357.2Department of Cardiology, San Filippo Neri Hospital, Rome, Italy
| | - P. Severino
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - M. Mancone
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - F. Fedele
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - C. Lavalle
- grid.7841.aDepartment of Cardiovascular, Respiratory, Nephrological, Aenesthesiological and Geriatric Sciences “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
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11
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Kitamura T, Fukamizu S, Arai T, Kawajiri K, Tanabe S, Tokioka S, Inagaki D, Hojo R. Long-term outcome of ventricular tachycardia ablation in patients who did not undergo programmed electrical stimulation after ablation. JOURNAL OF INTERVENTIONAL CARDIAC ELECTROPHYSIOLOGY : AN INTERNATIONAL JOURNAL OF ARRHYTHMIAS AND PACING 2023; 66:215-220. [PMID: 34319492 DOI: 10.1007/s10840-021-01037-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 07/05/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Ventricular arrhythmia inducibility is one of the ideal endpoints of ventricular tachycardia (VT) ablation. However, it may be challenging to implement programmed electrical stimulation (PES) at the end of the procedure under several circumstances. The long-term outcome of patients who did not undergo PES after VT ablation remains largely unknown. PURPOSE To investigate the details and long-term outcome of VT ablation in patients who did not undergo PES at the end of the ablation procedure. METHODS Among 183 VT ablation procedures in patients with structural heart disease who underwent VT ablation using an irrigated catheter, we enrolled those who did not undergo PES after VT ablation. VT ablation strategy involved targeting clinical VT plus pacemap-guided substrate ablation if inducible. When VT was not inducible, substrate-based ablation was performed. The primary endpoint was VT recurrence. RESULTS In 58 procedures, post-ablation VT inducibility was not assessed. The causes were non-inducibility of sustained VT before ablation (27/58, 46.6%), long procedure time (27.6%, mean 392 min), complications (10.3%), intolerant hemodynamic state (10.3%), and inaccessible or unsafe target (6.9%). With regard to the primary endpoint, 23 recurrences (39.7%) were observed during a mean follow-up period of 2.5 years. Patients with non-inducibility before ablation showed less VT recurrences (4/27, 14.8%) during follow-up than patients with other causes of untested PES after ablation (19/31, 61.2%) (Log-rank < 0.001). CONCLUSIONS VT recurrence was not observed in approximately 60% of the patients who did not undergo PES at the end of the ablation procedure. PES after VT ablation may be not needed among patients with pre-ablation non-inducibility.
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Affiliation(s)
- Takeshi Kitamura
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, 2 - 34 - 10 Ebisu, Shibuya-ku, Tokyo, Japan.
| | - Seiji Fukamizu
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, 2 - 34 - 10 Ebisu, Shibuya-ku, Tokyo, Japan
| | - Tomoyuki Arai
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, 2 - 34 - 10 Ebisu, Shibuya-ku, Tokyo, Japan
| | - Kohei Kawajiri
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, 2 - 34 - 10 Ebisu, Shibuya-ku, Tokyo, Japan
| | - Sho Tanabe
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, 2 - 34 - 10 Ebisu, Shibuya-ku, Tokyo, Japan
| | - Sayuri Tokioka
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, 2 - 34 - 10 Ebisu, Shibuya-ku, Tokyo, Japan
| | - Dai Inagaki
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, 2 - 34 - 10 Ebisu, Shibuya-ku, Tokyo, Japan
| | - Rintaro Hojo
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, 2 - 34 - 10 Ebisu, Shibuya-ku, Tokyo, Japan
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12
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Complications of catheter ablation for ventricular tachycardia. JOURNAL OF INTERVENTIONAL CARDIAC ELECTROPHYSIOLOGY : AN INTERNATIONAL JOURNAL OF ARRHYTHMIAS AND PACING 2023; 66:221-233. [PMID: 36053374 DOI: 10.1007/s10840-022-01357-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 08/20/2022] [Indexed: 11/09/2022]
Abstract
With the increasing literature demonstrating benefits of catheter ablation for ventricular tachycardia (VT), the number of patients undergoing VT ablation has increased dramatically. As VT ablation is being performed more routinely, operators must be aware of potential complications of VT ablation. This review delves deeper into the practice of VT ablation with a focus on periprocedural complications.
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13
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Radinovic A, Peretto G, Sgarito G, Cauti FM, Castro A, Narducci ML, Mantovan R, Scaglione M, Solimene F, Scopinaro A, Tondo C, Filippini G, Bianco E, Bonso A, Calzolari V, Ferraris F, Zardini M, Piacenti M, D'Angelo G, Bosica F, Della Bella P. Matching Ablation Endpoints to Long-Term Outcome: The Prospective Multicenter Italian Ventricular Tachycardia Ablation Registry. JACC Clin Electrophysiol 2022:S2405-500X(22)01046-5. [PMID: 36752462 DOI: 10.1016/j.jacep.2022.10.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/06/2022] [Accepted: 10/19/2022] [Indexed: 01/20/2023]
Abstract
BACKGROUND Multicenter ventricular tachycardia (VT) ablation studies have shown poorer outcomes compared with single-center experiences. This difference could be related to heterogeneous mapping and ablation strategies. OBJECTIVES This study evaluated a homogenous simplified catheter ablation strategy for different substrates and compared the results with those of a single referral center. METHODS This was a multicenter prospective VT ablation registry of patients with the following 4 causes of VT: previous myocardial infarction; previous myocarditis; arrhythmogenic right ventricular dysplasia; or idiopathic dilated cardiomyopathy. The procedural protocol included precise mapping and ablation steps with the combined endpoint of late potential (LP) abolition and noninducibility of VT. The long-term primary efficacy endpoint was freedom from VT. RESULTS A total of 309 patients were enrolled. LPs were present in 70% of patients and were abolished in 83%. At the end of the procedure 74% of LPs were noninducible. The primary combined endpoint of LP abolition and noninducibility was achieved in 64% of patients with LPs at baseline. Freedom from VT at 12 months was observed in 67% of patients. In the overall study group, VT inducibility was the only predictor of freedom from VT (P = 0.013). In patients with LPs, the VT recurrence rate was lower both for patients with complete LP abolition (P = 0.040) and for patients meeting the composite endpoint (P = 0.035). CONCLUSIONS A standardized VT mapping and ablation technique reproduced the procedural outcomes of a single referral center in a multicenter prospective study. LP abolition and noninducibility were effective in reducing VT recurrences in patients with 4 causes of cardiomyopathy. (Ventricular Tachycardia Ablation Registry; NCT03649022).
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Affiliation(s)
- Andrea Radinovic
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy.
| | - Giovanni Peretto
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | | | | | - Antonello Castro
- Cardiology unit Pertini Hospital- Azienda USL Roma B, Rome, Italy
| | | | | | | | | | - Alice Scopinaro
- Alessandria Hospital - SS. Antonio, Biagio, Cesare Arrigo, Alessandria, Italy
| | - Claudio Tondo
- Heart Rhythm Center, Centro Cardiologico Monzino, IRCCS Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche Università degli Studi di Miano, Milan, Italy
| | | | | | | | - Vittorio Calzolari
- Electrophysiology, Division of Cardiology, Neuro-Cardio-Vascular Department, Hospital of Treviso, ULSS 2 "Marca Trevigiana," Treviso, Italy
| | | | - Marco Zardini
- Cardiac Electrophysiology Section, Zenda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Marcello Piacenti
- CNR - Area della Ricerca di Pisa Fondazione Toscana G. Monasterio, Pisa, Italy
| | - Giuseppe D'Angelo
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Francesco Bosica
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Paolo Della Bella
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
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14
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Atreya AR, Yalagudri SD, Subramanian M, Rangaswamy VV, Saggu DK, Narasimhan C. Best Practices for the Catheter Ablation of Ventricular Arrhythmias. Card Electrophysiol Clin 2022; 14:571-607. [PMID: 36396179 DOI: 10.1016/j.ccep.2022.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Techniques for catheter ablation have evolved to effectively treat a range of ventricular arrhythmias. Pre-operative electrocardiographic and cardiac imaging data are very useful in understanding the arrhythmogenic substrate and can guide mapping and ablation. In this review, we focus on best practices for catheter ablation, with emphasis on tailoring ablation strategies, based on the presence or absence of structural heart disease, underlying clinical status, and hemodynamic stability of the ventricular arrhythmia. We discuss steps to make ablation safe and prevent complications, and techniques to improve the efficacy of ablation, including optimal use of electroanatomical mapping algorithms, energy delivery, intracardiac echocardiography, and selective use of mechanical circulatory support.
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Affiliation(s)
- Auras R Atreya
- Electrophysiology Section, AIG Hospitals Institute of Cardiac Sciences and Research, Hyderabad, India; Division of Cardiovascular Medicine, Electrophysiology Section, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Sachin D Yalagudri
- Electrophysiology Section, AIG Hospitals Institute of Cardiac Sciences and Research, Hyderabad, India
| | - Muthiah Subramanian
- Electrophysiology Section, AIG Hospitals Institute of Cardiac Sciences and Research, Hyderabad, India
| | | | - Daljeet Kaur Saggu
- Electrophysiology Section, AIG Hospitals Institute of Cardiac Sciences and Research, Hyderabad, India
| | - Calambur Narasimhan
- Electrophysiology Section, AIG Hospitals Institute of Cardiac Sciences and Research, Hyderabad, India.
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15
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Lerman BB, Cheung JW. Electrogram signatures in substrate mapping for ventricular tachycardia: Does phenomenology enhance clarity? Heart Rhythm 2022; 19:2084-2085. [PMID: 36041688 DOI: 10.1016/j.hrthm.2022.08.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 12/14/2022]
Affiliation(s)
- Bruce B Lerman
- Division of Cardiology and the Greenberg Institute for Cardiac Electrophysiology, Department of Medicine, Cornell University Medical Center, New York, New York.
| | - Jim W Cheung
- Division of Cardiology and the Greenberg Institute for Cardiac Electrophysiology, Department of Medicine, Cornell University Medical Center, New York, New York
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16
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Computational Re-Entry Vulnerability Index Mapping to Guide Ablation in Patients With Post-Myocardial Infarction Ventricular Tachycardia. JACC Clin Electrophysiol 2022; 9:301-310. [PMID: 36752477 DOI: 10.1016/j.jacep.2022.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 09/07/2022] [Accepted: 10/03/2022] [Indexed: 12/02/2022]
Abstract
BACKGROUND Ventricular tachycardias (VTs) in patients with myocardial infarction (MI) are often treated with catheter ablation. However, the VT induction during this procedure does not always identify all of the relevant activation pathways or may not be possible or tolerated. The re-entry vulnerability index (RVI) quantifies regional activation-repolarization differences and can detect multiple regions susceptible to re-entry without the need to induce the arrhythmia. OBJECTIVES This study aimed to further develop and validate the RVI mapping in patient-specific computational models of post-MI VTs. METHODS Cardiac magnetic resonance imaging data from 4 patients with post-MI VTs were used to induce VTs in a computational electrophysiological model by pacing. The RVI map of a premature beat in each patient model was used to guide virtual ablations. We compared our results with those of clinical ablation in the same patients. RESULTS Single-site virtual RVI-guided ablation prevented VT induction in 3 of 9 cases. Multisite virtual ablations guided by RVI mapping successfully prevented re-entry in all cases (9 of 9). Overall, virtual ablation required 15-fold fewer ablation sites (235.5 ± 97.4 vs 17 ± 6.8) and 2-fold less ablation volume (5.34 ± 1.79 mL vs 2.11 ± 0.65 mL) than the clinical ablation. CONCLUSIONS RVI mapping allows localization of multiple regions susceptible to re-entry and may help guide VT ablation. RVI mapping does not require the induction of arrhythmia and may result in less ablated myocardial volumes with fewer ablation sites.
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17
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Adeliño R, Martínez-Falguera D, Curiel C, Teis A, Marsal R, Rodríguez-Leor O, Prat-Vidal C, Fadeuilhe E, Aranyó J, Revuelta-López E, Sarrias A, Bazan V, Andrés-Cordón JF, Roura S, Villuendas R, Lupón J, Bayes-Genis A, Gálvez-Montón C, Bisbal F. Electrophysiological effects of adipose graft transposition procedure (AGTP) on the post-myocardial infarction scar: A multimodal characterization of arrhythmogenic substrate. Front Cardiovasc Med 2022; 9:983001. [PMID: 36204562 PMCID: PMC9530287 DOI: 10.3389/fcvm.2022.983001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022] Open
Abstract
Objective To assess the arrhythmic safety profile of the adipose graft transposition procedure (AGTP) and its electrophysiological effects on post-myocardial infarction (MI) scar. Background Myocardial repair is a promising treatment for patients with MI. The AGTP is a cardiac reparative therapy that reduces infarct size and improves cardiac function. The impact of AGTP on arrhythmogenesis has not been addressed. Methods MI was induced in 20 swine. Contrast-enhanced magnetic resonance (ce-MRI), electrophysiological study (EPS), and left-ventricular endocardial high-density mapping were performed 15 days post-MI. Animals were randomized 1:1 to AGTP or sham-surgery group and monitored with ECG-Holter. Repeat EPS, endocardial mapping, and ce-MRI were performed 30 days post-intervention. Myocardial SERCA2, Connexin-43 (Cx43), Ryanodine receptor-2 (RyR2), and cardiac troponin-I (cTnI) gene and protein expression were evaluated. Results The AGTP group showed a significant reduction of the total infarct scar, border zone and dense scar mass by ce-MRI (p = 0.04), and a decreased total scar and border zone area in bipolar voltage mapping (p < 0.001). AGTP treatment significantly reduced the area of very-slow conduction velocity (<0.2 m/s) (p = 0.002), the number of deceleration zones (p = 0.029), and the area of fractionated electrograms (p = 0.005). No differences were detected in number of induced or spontaneous ventricular arrhythmias at EPS and Holter-monitoring. SERCA2, Cx43, and RyR2 gene expression were decreased in the infarct core of AGTP-treated animals (p = 0.021, p = 0.018, p = 0.051, respectively). Conclusion AGTP is a safe reparative therapy in terms of arrhythmic risk and provides additional protective effect against adverse electrophysiological remodeling in ischemic heart disease.
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Affiliation(s)
- Raquel Adeliño
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
| | - Daina Martínez-Falguera
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Faculty of Medicine, University of Barcelona, Barcelona, Spain
| | - Carolina Curiel
- Boston Scientific Department, Barcelona Delegation, Barcelona, Spain
| | - Albert Teis
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
| | - Roger Marsal
- Boston Scientific Department, Barcelona Delegation, Barcelona, Spain
| | - Oriol Rodríguez-Leor
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
| | - Cristina Prat-Vidal
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
| | - Edgar Fadeuilhe
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
| | - Júlia Aranyó
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
| | - Elena Revuelta-López
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
| | - Axel Sarrias
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
| | - Víctor Bazan
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
| | | | - Santiago Roura
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- Faculty of Medicine, University of Vic-Central University of Catalonia (UVic-UCC), Vic, Spain
| | - Roger Villuendas
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
| | - Josep Lupón
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- Department of Medicine, Can Ruti Campus, Autonomous University of Barcelona, Barcelona, Spain
| | - Antoni Bayes-Genis
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- Department of Medicine, Can Ruti Campus, Autonomous University of Barcelona, Barcelona, Spain
| | - Carolina Gálvez-Montón
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- *Correspondence: Carolina Gálvez-Montón,
| | - Felipe Bisbal
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- *Correspondence: Carolina Gálvez-Montón,
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18
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Dawkins JF, Ehdaie A, Rogers R, Soetkamp D, Valle J, Holm K, Sanchez L, Tremmel I, Nawaz A, Shehata M, Wang X, Prakosa A, Yu J, Van Eyk JE, Trayanova N, Marbán E, Cingolani E. Biological substrate modification suppresses ventricular arrhythmias in a porcine model of chronic ischaemic cardiomyopathy. Eur Heart J 2022; 43:2139-2156. [PMID: 35262692 PMCID: PMC9649918 DOI: 10.1093/eurheartj/ehac042] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 01/25/2022] [Accepted: 01/26/2022] [Indexed: 08/15/2023] Open
Abstract
AIMS Cardiomyopathy patients are prone to ventricular arrhythmias (VA) and sudden cardiac death. Current therapies to prevent VA include radiofrequency ablation to destroy slowly conducting pathways of viable myocardium which support re-entry. Here, we tested the reverse concept, namely that boosting local tissue viability in zones of slow conduction might eliminate slow conduction and suppress VA in ischaemic cardiomyopathy. METHODS AND RESULTS Exosomes are extracellular vesicles laden with bioactive cargo. Exosomes secreted by cardiosphere-derived cells (CDCEXO) reduce scar and improve heart function after intramyocardial delivery. In a VA-prone porcine model of ischaemic cardiomyopathy, we injected CDCEXO or vehicle into zones of delayed conduction defined by electroanatomic mapping. Up to 1-month post-injection, CDCEXO, but not the vehicle, decreased myocardial scar, suppressed slowly conducting electrical pathways, and inhibited VA induction by programmed electrical stimulation. In silico reconstruction of electrical activity based on magnetic resonance images accurately reproduced the suppression of VA inducibility by CDCEXO. Strong anti-fibrotic effects of CDCEXO, evident histologically and by proteomic analysis from pig hearts, were confirmed in a co-culture assay of cardiomyocytes and fibroblasts. CONCLUSION Biological substrate modification by exosome injection may be worth developing as a non-destructive alternative to conventional ablation for the prevention of recurrent ventricular tachyarrhythmias.
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Affiliation(s)
- James F. Dawkins
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Ashkan Ehdaie
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Russell Rogers
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Daniel Soetkamp
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Jackelyn Valle
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Kevin Holm
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Lizbeth Sanchez
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Ileana Tremmel
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Asma Nawaz
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Michael Shehata
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Xunzhang Wang
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Adityo Prakosa
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Joseph Yu
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Jennifer E Van Eyk
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Natalia Trayanova
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Eduardo Marbán
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Eugenio Cingolani
- Smidt Heart Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
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19
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Spectral characterisation of ventricular intracardiac potentials in human post-ischaemic bipolar electrograms. Sci Rep 2022; 12:4782. [PMID: 35314732 PMCID: PMC8938475 DOI: 10.1038/s41598-022-08743-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 03/11/2022] [Indexed: 11/08/2022] Open
Abstract
AbstractAbnormal ventricular potentials (AVPs) are frequently referred to as high-frequency deflections in intracardiac electrograms (EGMs). However, no scientific study performed a deep spectral characterisation of AVPs and physiological potentials in real bipolar intracardiac recordings across the entire frequency range imposed by their sampling frequency. In this work, the power contributions of post-ischaemic physiological potentials and AVPs, along with some spectral features, were evaluated in the frequency domain and then statistically compared to highlight specific spectral signatures for these signals. To this end, 450 bipolar EGMs from seven patients affected by post-ischaemic ventricular tachycardia were retrospectively annotated by an experienced cardiologist. Given the high variability of the morphologies observed, three different sub-classes of AVPs and two sub-categories of post-ischaemic physiological potentials were considered. All signals were acquired by the CARTO® 3 system during substrate-guided catheter ablation procedures. Our findings indicated that the main frequency contributions of physiological and pathological post-ischaemic EGMs are found below 320 Hz. Statistical analyses showed that, when biases due to the signal amplitude influence are eliminated, not only physiological potentials show greater contributions below 20 Hz whereas AVPs demonstrate higher spectral contributions above ~ 40 Hz, but several finer differences may be observed between the different AVP types.
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20
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Advances in Mapping of Ventricular Tachycardia. CURRENT TREATMENT OPTIONS IN CARDIOVASCULAR MEDICINE 2021. [DOI: 10.1007/s11936-021-00951-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Merino-Caviedes S, Gutierrez LK, Alfonso-Almazán JM, Sanz-Estébanez S, Cordero-Grande L, Quintanilla JG, Sánchez-González J, Marina-Breysse M, Galán-Arriola C, Enríquez-Vázquez D, Torres C, Pizarro G, Ibáñez B, Peinado R, Merino JL, Pérez-Villacastín J, Jalife J, López-Yunta M, Vázquez M, Aguado-Sierra J, González-Ferrer JJ, Pérez-Castellano N, Martín-Fernández M, Alberola-López C, Filgueiras-Rama D. Time-efficient three-dimensional transmural scar assessment provides relevant substrate characterization for ventricular tachycardia features and long-term recurrences in ischemic cardiomyopathy. Sci Rep 2021; 11:18722. [PMID: 34580343 PMCID: PMC8476552 DOI: 10.1038/s41598-021-97399-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 08/17/2021] [Indexed: 11/21/2022] Open
Abstract
Delayed gadolinium-enhanced cardiac magnetic resonance (LGE-CMR) imaging requires novel and time-efficient approaches to characterize the myocardial substrate associated with ventricular arrhythmia in patients with ischemic cardiomyopathy. Using a translational approach in pigs and patients with established myocardial infarction, we tested and validated a novel 3D methodology to assess ventricular scar using custom transmural criteria and a semiautomatic approach to obtain transmural scar maps in ventricular models reconstructed from both 3D-acquired and 3D-upsampled-2D-acquired LGE-CMR images. The results showed that 3D-upsampled models from 2D LGE-CMR images provided a time-efficient alternative to 3D-acquired sequences to assess the myocardial substrate associated with ischemic cardiomyopathy. Scar assessment from 2D-LGE-CMR sequences using 3D-upsampled models was superior to conventional 2D assessment to identify scar sizes associated with the cycle length of spontaneous ventricular tachycardia episodes and long-term ventricular tachycardia recurrences after catheter ablation. This novel methodology may represent an efficient approach in clinical practice after manual or automatic segmentation of myocardial borders in a small number of conventional 2D LGE-CMR slices and automatic scar detection.
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Affiliation(s)
| | - Lilian K Gutierrez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain
| | | | | | - Lucilio Cordero-Grande
- Universidad Politécnica de Madrid, Biomedical Image Technologies, ETSI Telecomunicación, Madrid, Spain.,Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain
| | - Jorge G Quintanilla
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain.,Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Cardiovascular Institute, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | | | - Manuel Marina-Breysse
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Carlos Galán-Arriola
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Daniel Enríquez-Vázquez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain.,Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Cardiovascular Institute, Madrid, Spain
| | - Carlos Torres
- Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Cardiovascular Institute, Madrid, Spain
| | - Gonzalo Pizarro
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.,Hospital Ruber Juan Bravo Quironsalud UEM, Cardiology Department, Madrid, Spain
| | - Borja Ibáñez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.,IIS-University Hospital Fundación Jiménez Díaz, Cardiology Department, Madrid, Spain
| | - Rafael Peinado
- Hospital Universitario La Paz, Cardiology Department, Madrid, Spain
| | - Jose Luis Merino
- Hospital Universitario La Paz, Cardiology Department, Madrid, Spain
| | - Julián Pérez-Villacastín
- Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Cardiovascular Institute, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.,Fundación Interhospitalaria para la Investigación Cardiovascular (FIC), Madrid, Spain
| | - José Jalife
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | | | - Mariano Vázquez
- Barcelona Supercomputing Center (BSC), Barcelona, Spain.,ELEM Biotech SL., Barcelona, Spain
| | | | - Juan José González-Ferrer
- Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Cardiovascular Institute, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Nicasio Pérez-Castellano
- Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Cardiovascular Institute, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.,Fundación Interhospitalaria para la Investigación Cardiovascular (FIC), Madrid, Spain
| | | | | | - David Filgueiras-Rama
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Myocardial Pathophysiology Area, Madrid, Spain. .,Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Cardiovascular Institute, Madrid, Spain. .,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.
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22
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Nakatani Y, Maury P, Rollin A, Ramirez FD, Goujeau C, Nakashima T, André C, Carapezzi A, Krisai P, Takagi T, Kamakura T, Vlachos K, Cheniti G, Tixier R, Voglimacci-Stefanopoli Q, Welte N, Chauvel R, Duchateau J, Pambrun T, Derval N, Hocini M, Haïssaguerre M, Jaïs P, Sacher F. Accuracy of automatic abnormal potential annotation for substrate identification in scar-related ventricular tachycardia. J Cardiovasc Electrophysiol 2021; 32:2216-2224. [PMID: 34223662 DOI: 10.1111/jce.15148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/28/2021] [Accepted: 05/31/2021] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Ultrahigh-density mapping for ventricular tachycardia (VT) is increasingly used. However, manual annotation of local abnormal ventricular activities (LAVAs) is challenging in this setting. Therefore, we assessed the accuracy of the automatic annotation of LAVAs with the Lumipoint algorithm of the Rhythmia system (Boston Scientific). METHODS AND RESULTS One hundred consecutive patients undergoing catheter ablation of scar-related VT were studied. Areas with LAVAs and ablation sites were manually annotated during the procedure and compared with automatically annotated areas using the Lumipoint features for detecting late potentials (LP), fragmented potentials (FP), and double potentials (DP). The accuracy of each automatic annotation feature was assessed by re-evaluating local potentials within automatically annotated areas. Automatically annotated areas matched with manually annotated areas in 64 cases (64%), identified an area with LAVAs missed during manual annotation in 15 cases (15%), and did not highlight areas identified with manual annotation in 18 cases (18%). Automatic FP annotation accurately detected LAVAs regardless of the cardiac rhythm or scar location; automatic LP annotation accurately detected LAVAs in sinus rhythm, but was affected by the scar location during ventricular pacing; automatic DP annotation was not affected by the mapping rhythm, but its accuracy was suboptimal when the scar was located on the right ventricle or epicardium. CONCLUSION The Lumipoint algorithm was as/more accurate than manual annotation in 79% of patients. FP annotation detected LAVAs most accurately regardless of mapping rhythm and scar location. The accuracy of LP and DP annotations varied depending on mapping rhythm or scar location.
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Affiliation(s)
- Yosuke Nakatani
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Philippe Maury
- Unité Inserm U 1048, University Hospital Rangueil, Toulouse, France
| | - Anne Rollin
- Unité Inserm U 1048, University Hospital Rangueil, Toulouse, France
| | - F Daniel Ramirez
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Cyril Goujeau
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Takashi Nakashima
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Clémentine André
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | | | - Philipp Krisai
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Takamitsu Takagi
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Tsukasa Kamakura
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Konstantinos Vlachos
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Ghassen Cheniti
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Romain Tixier
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | | | - Nicolas Welte
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Remi Chauvel
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Josselin Duchateau
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Thomas Pambrun
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Nicolas Derval
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Mélèze Hocini
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Michel Haïssaguerre
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Pierre Jaïs
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
| | - Frédéric Sacher
- Department of Cardiac Pacing and Electrophysiology, IHU Liryc, Electrophysiology and Heart Modeling Institute, University Hospital (CHU), University of Bordeaux, Bordeaux, France
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23
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Zoppo F, Gagno G, Perazza L, Cocciolo A, Mugnai G, Vaccari D, Calzolari V. Electroanatomic voltage mapping for tissue characterization beyond arrhythmia definition: A systematic review. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2021; 44:1432-1448. [PMID: 34096635 DOI: 10.1111/pace.14288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 05/17/2021] [Accepted: 05/30/2021] [Indexed: 11/28/2022]
Abstract
Three-dimensional (3D) reconstruction by means of electroanatomic mapping (EAM) systems, allows for the understanding of the mechanism of focal or re-entrant arrhythmic circuits, which can be identified by means of dynamic (activation and propagation) and static (voltage) color-coded maps. However, besides this conventional use, EAM may offer helpful anatomical and functional information for tissue characterisation in several clinical settings. Today, data regarding electromechanical myocardial viability, scar detection in ischaemic and nonischaemic cardiomyopathy and arrhythmogenic right ventricle dysplasia (ARVC/D) definition are mostly consolidated, while emerging results are becoming available in contexts such as Brugada syndrome and cardiac resynchronisation therapy (CRT) implant procedures. As part of an invasive procedure, EAM has not yet been widely adopted as a stand-alone tool in the diagnostic path. We aim to review the data in the current literature regarding the use of 3D EAM systems beyond the definition of arrhythmia.
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Affiliation(s)
- Franco Zoppo
- Elettrofisiologia, U.O.C. di Cardiologia, Ospedale Civile Gorizia, Gorizia, Italy
| | - Giulia Gagno
- Dipartimento di Cardiologia, Azienda Sanitaria Universitaria Giuliano Isontina, ed Università degli Studi di Trieste, Trieste, Italy
| | - Luca Perazza
- Elettrofisiologia, U.O.C. di Cardiologia, Ospedale Civile Gorizia, Gorizia, Italy
| | - Andrea Cocciolo
- Elettrofisiologia, U.O.C. di Cardiologia, Ospedale Civile Gorizia, Gorizia, Italy
| | - Giacomo Mugnai
- Elettrofisiologia, U.O.C di Cardiologia, Ospedale Civile Arzignano, Vicenza, Italy
| | - Diego Vaccari
- Elettrofisiologia, U.O.C di Cardiologia, Ospedale Civile Feltre, Belluno, Italy
| | - Vittorio Calzolari
- Elettrofisiologia, U.O.C di Cardiologia, Ospedale Civile Treviso, Treviso, Italy
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24
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Papageorgiou N, Srinivasan NT. Dynamic High-density Functional Substrate Mapping Improves Outcomes in Ischaemic Ventricular Tachycardia Ablation: Sense Protocol Functional Substrate Mapping and Other Functional Mapping Techniques. Arrhythm Electrophysiol Rev 2021; 10:38-44. [PMID: 33936742 PMCID: PMC8076974 DOI: 10.15420/aer.2020.28] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Post-infarct-related ventricular tachycardia (VT) occurs due to reentry over surviving fibres within ventricular scar tissue. The mapping and ablation of patients in VT remains a challenge when VT is poorly tolerated and in cases in which VT is non-sustained or not inducible. Conventional substrate mapping techniques are limited by the ambiguity of substrate characterisation methods and the variety of mapping tools, which may record signals differently based on their bipolar spacing and electrode size. Real world data suggest that outcomes from VT ablation remain poor in terms of freedom from recurrent therapy using conventional techniques. Functional substrate mapping techniques, such as single extrastimulus protocol mapping, identify regions of unmasked delayed potentials, which, by nature of their dynamic and functional components, may play a critical role in sustaining VT. These methods may improve substrate mapping of VT, potentially making ablation safer and more reproducible, and thereby improving the outcomes. Further large-scale studies are needed.
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Affiliation(s)
- Nikolaos Papageorgiou
- Department of Cardiac Electrophysiology, Barts Heart Centre, St Bartholomew's Hospital, London, UK
| | - Neil T Srinivasan
- Department of Cardiac Electrophysiology, Barts Heart Centre, St Bartholomew's Hospital, London, UK.,Institute of Cardiovascular Science, University College London, London, UK.,Department of Cardiac Electrophysiology, Essex Cardiothoracic Centre, Basildon, UK
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25
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Nakashima T, Cheniti G, Takagi T, Vlachos K, Goujeau C, André C, Krisai P, Ramirez FD, Pintican G, Kamakura T, Nakatani Y, Surget E, Roux JR, Meillet V, Carapezzi A, Tixier R, Chauvel R, Pambrun T, Duchateau J, Derval N, Pillois X, Cochet H, Hocini M, Haïssaguerre M, Jaïs P, Sacher F. Local abnormal ventricular activity detection in scar-related VT: Microelectrode versus conventional bipolar electrode. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2021; 44:1075-1084. [PMID: 33932234 DOI: 10.1111/pace.14253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/11/2021] [Accepted: 04/25/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Conventional bipolar electrodes (CBE) may be suboptimal to detect local abnormal ventricular activities (LAVAs). Microelectrodes (ME) may improve the detection of LAVAs. This study sought to elucidate the detectability of LAVAs using ME compared with CBE in patients with scar-related ventricular tachycardia (VT). METHODS We included consecutive patients with structural heart disease who underwent radiofrequency catheter ablation for scar-related VT using either of the following catheters equipped with ME: QDOTTM or IntellaTip MIFITM. Detection field of LAVA potentials were classified as three types: Type 1 (both CBE and ME detected LAVA), Type 2 (CBE did not detect LAVA while ME did), and Type 3 (CBE detected LAVA while ME did not). RESULTS In 16 patients (68 ± 16 years; 14 males), 260 LAVAs electrograms (QDOT = 72; MIFI = 188) were analyzed. Type 1, type 2, and type 3 detections were 70.8% (QDOT, 69.4%; MIFI, 71.3%), 20.0% (QDOT, 23.6%; MIFI, 18.6%) and 9.2% (QDOT, 6.9%; MIFI, 10.1%), respectively. The LAVAs amplitudes detected by ME were higher than those detected by CBE in both catheters (QDOT: ME 0.79 ± 0.50 mV vs. CBE 0.41 ± 0.42 mV, p = .001; MIFI: ME 0.73 ± 0.64 mV vs. CBE 0.38 ± 0.36 mV, p < .001). CONCLUSIONS ME allow to identify 20% of LAVAs missed by CBE. ME showed higher amplitude LAVAs than CBE. However, 9.2% of LAVAs can still be missed by ME.
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Affiliation(s)
- Takashi Nakashima
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Ghassen Cheniti
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Takamitsu Takagi
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Konstantinos Vlachos
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France.,Department of Cardiac Pacing and Electrophysiology, Evangelismos General Hospital of Athens, Athens, Greece
| | - Cyril Goujeau
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Clémentine André
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Philipp Krisai
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - F Daniel Ramirez
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France.,Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Gabriela Pintican
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Tsukasa Kamakura
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Yosuke Nakatani
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Elodie Surget
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | | | | | | | - Romain Tixier
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Remi Chauvel
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Thomas Pambrun
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Josselin Duchateau
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Nicolas Derval
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Xavier Pillois
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Hubert Cochet
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Mélèze Hocini
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Michel Haïssaguerre
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Pierre Jaïs
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
| | - Frédéric Sacher
- Department of Cardiac Pacing and Electrophysiology, Univ. Bordeaux, Bordeaux University Hospital (CHU), Pessac-Bordeaux, France
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Zoppo F, Gagno G, Perazza L, Cocciolo A, Mugnai G, Vaccari D, Calzolari V. Electroanatomic voltage mapping and characterisation imaging for "right ventricle arrhythmic syndromes" beyond the arrhythmia definition: a comprehensive review. Int J Cardiovasc Imaging 2021; 37:2347-2357. [PMID: 33761057 DOI: 10.1007/s10554-021-02221-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 03/08/2021] [Indexed: 11/30/2022]
Abstract
Three-dimensional (3D) reconstruction by means of electroanatomic mapping (EAM) systems, allows for the understanding of the mechanism of focal or re-entrant arrhythmic circuits along with pacing techniques. However, besides this conventional use, EAM may offer helpful anatomical and functional information. Data regarding electromechanical scar detection in ischaemic (and nonischaemic) cardiomyopathy are mostly consolidated, while emerging results are becoming available in contexts such as arrhythmogenic right ventricular dysplasia (ARVC/D) definition and Brugada syndrome. As part of an invasive procedure, EAM has not yet been widely adopted as a stand-alone tool in the diagnostic path. We aim to review the current literature regarding the use of 3D EAM systems for right ventricle (RV) functional characterisation beyond the definition of arrhythmia.
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Affiliation(s)
- Franco Zoppo
- Elettrofisiologia, U.O.C. Di Cardiologia, Ospedale Civile Gorizia, Gorizia, Italy.
| | - Giulia Gagno
- Azienda Sanitaria Universitaria Giuliano Isontina - Dipartimento di Cardiologia Trieste, Trieste, Italy
| | - Luca Perazza
- Elettrofisiologia, U.O.C. Di Cardiologia, Ospedale Civile Gorizia, Gorizia, Italy
| | - Andrea Cocciolo
- Elettrofisiologia, U.O.C. Di Cardiologia, Ospedale Civile Gorizia, Gorizia, Italy
| | - Giacomo Mugnai
- Elettrofisiologia, U.O.C Di Cardiologia, Ospedale Civile Arzignano, Vicenza, Italy
| | - Diego Vaccari
- Elettrofisiologia, U.O.C Di Cardiologia, Ospedale Civile Feltre, Belluno, Italy
| | - Vittorio Calzolari
- Elettrofisiologia, U.O.C Di Cardiologia, Ospedale Civile Treviso, Treviso, Italy
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27
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Schwarzl JM, Schleberger R, Kahle AK, Höller A, Schwarzl M, Schaeffer BN, Münkler P, Moser J, Akbulak RÖ, Eickholt C, Dinshaw L, Dickow J, Maury P, Sacher F, Martin CA, Wong T, Estner HL, Jaïs P, Willems S, Meyer C. Specific electrogram characteristics impact substrate ablation target area in patients with scar-related ventricular tachycardia-insights from automated ultrahigh-density mapping. J Cardiovasc Electrophysiol 2021; 32:376-388. [PMID: 33368769 DOI: 10.1111/jce.14859] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/26/2020] [Accepted: 11/09/2020] [Indexed: 01/19/2023]
Abstract
INTRODUCTION Substrate-based catheter ablation approaches to ventricular tachycardia (VT) focus on low-voltage areas and abnormal electrograms. However, specific electrogram characteristics in sinus rhythm are not clearly defined and can be subject to variable interpretation. We analyzed the potential ablation target size using automatic abnormal electrogram detection and studied findings during substrate mapping in the VT isthmus area. METHODS AND RESULTS Electrogram characteristics in 61 patients undergoing scar-related VT ablation using ultrahigh-density 3D-mapping with a 64-electrode mini-basket catheter were analyzed retrospectively. Forty-four complete substrate maps with a mean number of 10319 ± 889 points were acquired. Fractionated potentials detected by automated annotation and manual review were present in 43 ± 21% of the entire low-voltage area (<1.0 mV), highly fractionated potentials in 7 ± 8%, late potentials in 13 ± 15%, fractionated late potentials in 7 ± 9% and isolated late potentials in 2 ± 4%, respectively. Highly fractionated potentials (>10 ± 1 fractionations) were found in all isthmus areas of identified VT during substrate mapping, while isolated late potentials were distant from the critical isthmus area in 29%. CONCLUSION The ablation target area varies enormously in size, depending on the definition of abnormal electrograms. Clear linking of abnormal electrograms with critical VT isthmus areas during substrate mapping remains difficult due to a lack of specificity rather than sensitivity. However, highly fractionated, low-voltage electrograms were found to be present in all critical VT isthmus sites.
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Affiliation(s)
- Jana M Schwarzl
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ruben Schleberger
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ann-Kathrin Kahle
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alexandra Höller
- Institute of Medical Biometry and Epidemiology, Center of Experimental Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Michael Schwarzl
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Center for Cardiovascular Research), Berlin, Germany
| | - Benjamin N Schaeffer
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Paula Münkler
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Center for Cardiovascular Research), Berlin, Germany
| | - Julia Moser
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ruken Ö Akbulak
- Department of Cardiology, Asklepios Hospital St. Georg, Hamburg, Germany
| | - Christian Eickholt
- Department of Cardiology, Asklepios Hospital St. Georg, Hamburg, Germany
| | - Leon Dinshaw
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jannis Dickow
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Philippe Maury
- Department of Cardiology, University Hospital Rangueil, Toulouse, France
| | - Frederic Sacher
- Department of Cardiac Electrophysiology, LIRYC Institute, Bordeaux University Hospital, Bordeaux, France
| | - Claire A Martin
- Department of Cardiology, Royal Papworth Hospital, National Health Service Foundation Trust, Cambridge, UK
| | - Tom Wong
- Heart Rhythm Center, Imperial College London, The Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | - Heidi L Estner
- Department of Internal Medicine I - Cardiology, University Hospital Munich, Ludwig-Maximilian University Munich, Munich, Germany
| | - Pierre Jaïs
- Department of Cardiac Electrophysiology, LIRYC Institute, Bordeaux University Hospital, Bordeaux, France
| | - Stephan Willems
- DZHK (German Center for Cardiovascular Research), Berlin, Germany.,Department of Cardiology, Asklepios Hospital St. Georg, Hamburg, Germany
| | - Christian Meyer
- DZHK (German Center for Cardiovascular Research), Berlin, Germany.,Division of Cardiology, cardiac Neuro- and Electrophysiology Research Consortium (cNEP), EVK Düsseldorf, Düsseldorf, Germany.,Institute for Neural and Sensory Physiology, Cardiac Neuro- and Electrophysiology Research Consortium (cNEP), Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
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28
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Cronin EM, Bogun FM, Maury P, Peichl P, Chen M, Namboodiri N, Aguinaga L, Leite LR, Al-Khatib SM, Anter E, Berruezo A, Callans DJ, Chung MK, Cuculich P, d'Avila A, Deal BJ, Della Bella P, Deneke T, Dickfeld TM, Hadid C, Haqqani HM, Kay GN, Latchamsetty R, Marchlinski F, Miller JM, Nogami A, Patel AR, Pathak RK, Sáenz Morales LC, Santangeli P, Sapp JL, Sarkozy A, Soejima K, Stevenson WG, Tedrow UB, Tzou WS, Varma N, Zeppenfeld K. 2019 HRS/EHRA/APHRS/LAHRS expert consensus statement on catheter ablation of ventricular arrhythmias. Europace 2020; 21:1143-1144. [PMID: 31075787 DOI: 10.1093/europace/euz132] [Citation(s) in RCA: 208] [Impact Index Per Article: 52.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Ventricular arrhythmias are an important cause of morbidity and mortality and come in a variety of forms, from single premature ventricular complexes to sustained ventricular tachycardia and fibrillation. Rapid developments have taken place over the past decade in our understanding of these arrhythmias and in our ability to diagnose and treat them. The field of catheter ablation has progressed with the development of new methods and tools, and with the publication of large clinical trials. Therefore, global cardiac electrophysiology professional societies undertook to outline recommendations and best practices for these procedures in a document that will update and replace the 2009 EHRA/HRS Expert Consensus on Catheter Ablation of Ventricular Arrhythmias. An expert writing group, after reviewing and discussing the literature, including a systematic review and meta-analysis published in conjunction with this document, and drawing on their own experience, drafted and voted on recommendations and summarized current knowledge and practice in the field. Each recommendation is presented in knowledge byte format and is accompanied by supportive text and references. Further sections provide a practical synopsis of the various techniques and of the specific ventricular arrhythmia sites and substrates encountered in the electrophysiology lab. The purpose of this document is to help electrophysiologists around the world to appropriately select patients for catheter ablation, to perform procedures in a safe and efficacious manner, and to provide follow-up and adjunctive care in order to obtain the best possible outcomes for patients with ventricular arrhythmias.
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Affiliation(s)
| | | | | | - Petr Peichl
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Minglong Chen
- Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Narayanan Namboodiri
- Sree Chitra Institute for Medical Sciences and Technology, Thiruvananthapuram, India
| | | | | | | | - Elad Anter
- Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | | | | | | | | | - Andre d'Avila
- Hospital Cardiologico SOS Cardio, Florianopolis, Brazil
| | - Barbara J Deal
- Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | | | | | | | - Claudio Hadid
- Hospital General de Agudos Cosme Argerich, Buenos Aires, Argentina
| | - Haris M Haqqani
- University of Queensland, The Prince Charles Hospital, Chermside, Australia
| | - G Neal Kay
- University of Alabama at Birmingham, Birmingham, Alabama
| | | | | | - John M Miller
- Indiana University School of Medicine, Krannert Institute of Cardiology, Indianapolis, Indiana
| | | | - Akash R Patel
- University of California San Francisco Benioff Children's Hospital, San Francisco, California
| | | | | | | | - John L Sapp
- Queen Elizabeth II Health Sciences Centre, Halifax, Canada
| | - Andrea Sarkozy
- University Hospital Antwerp, University of Antwerp, Antwerp, Belgium
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Cronin EM, Bogun FM, Maury P, Peichl P, Chen M, Namboodiri N, Aguinaga L, Leite LR, Al-Khatib SM, Anter E, Berruezo A, Callans DJ, Chung MK, Cuculich P, d'Avila A, Deal BJ, Bella PD, Deneke T, Dickfeld TM, Hadid C, Haqqani HM, Kay GN, Latchamsetty R, Marchlinski F, Miller JM, Nogami A, Patel AR, Pathak RK, Saenz Morales LC, Santangeli P, Sapp JL, Sarkozy A, Soejima K, Stevenson WG, Tedrow UB, Tzou WS, Varma N, Zeppenfeld K. 2019 HRS/EHRA/APHRS/LAHRS expert consensus statement on catheter ablation of ventricular arrhythmias. J Interv Card Electrophysiol 2020; 59:145-298. [PMID: 31984466 PMCID: PMC7223859 DOI: 10.1007/s10840-019-00663-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Ventricular arrhythmias are an important cause of morbidity and mortality and come in a variety of forms, from single premature ventricular complexes to sustained ventricular tachycardia and fibrillation. Rapid developments have taken place over the past decade in our understanding of these arrhythmias and in our ability to diagnose and treat them. The field of catheter ablation has progressed with the development of new methods and tools, and with the publication of large clinical trials. Therefore, global cardiac electrophysiology professional societies undertook to outline recommendations and best practices for these procedures in a document that will update and replace the 2009 EHRA/HRS Expert Consensus on Catheter Ablation of Ventricular Arrhythmias. An expert writing group, after reviewing and discussing the literature, including a systematic review and meta-analysis published in conjunction with this document, and drawing on their own experience, drafted and voted on recommendations and summarized current knowledge and practice in the field. Each recommendation is presented in knowledge byte format and is accompanied by supportive text and references. Further sections provide a practical synopsis of the various techniques and of the specific ventricular arrhythmia sites and substrates encountered in the electrophysiology lab. The purpose of this document is to help electrophysiologists around the world to appropriately select patients for catheter ablation, to perform procedures in a safe and efficacious manner, and to provide follow-up and adjunctive care in order to obtain the best possible outcomes for patients with ventricular arrhythmias.
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Affiliation(s)
| | | | | | - Petr Peichl
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Minglong Chen
- Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Narayanan Namboodiri
- Sree Chitra Institute for Medical Sciences and Technology, Thiruvananthapuram, India
| | | | | | | | - Elad Anter
- Beth Israel Deaconess Medical Center, Boston, MA, USA
| | | | | | | | | | - Andre d'Avila
- Hospital Cardiologico SOS Cardio, Florianopolis, Brazil
| | - Barbara J Deal
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | | | | | - Claudio Hadid
- Hospital General de Agudos Cosme Argerich, Buenos Aires, Argentina
| | - Haris M Haqqani
- University of Queensland, The Prince Charles Hospital, Chermside, Australia
| | - G Neal Kay
- University of Alabama at Birmingham, Birmingham, AL, USA
| | | | | | - John M Miller
- Indiana University School of Medicine, Krannert Institute of Cardiology, Indianapolis, IN, USA
| | | | - Akash R Patel
- University of California San Francisco Benioff Children's Hospital, San Francisco, CA, USA
| | | | | | | | - John L Sapp
- Queen Elizabeth II Health Sciences Centre, Halifax, Canada
| | - Andrea Sarkozy
- University Hospital Antwerp, University of Antwerp, Antwerp, Belgium
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30
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Zhou X, Jiang Y, Sohinki D, Liu W, Po SS. Effects of 60-Hertz notch filtering on local abnormal ventricular activities. Heart Rhythm 2020; 18:172-180. [PMID: 32911051 DOI: 10.1016/j.hrthm.2020.08.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 08/12/2020] [Accepted: 08/25/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND It is known that electrical signals can be affected by notch filtering. OBJECTIVE We sought to investigate the effect of 60-Hz notch filtering on local abnormal ventricular activities (LAVA) in patients undergoing ventricular tachycardia ablation. METHODS To ensure catheter stability, only patients undergoing ablation using Stereotaxis mapping catheters were enrolled. Catheter stability was judged by the display on the electroanatomic map and the morphology of the bipolar and unipolar electrograms of the ablation catheter. At sites recording stable LAVA, 60-Hz notch filtering was applied. The duration, amplitude, and morphology of LAVA were compared before and after filtering. The area under LAVA was used to analyze the amplitude of continuous LAVA. RESULTS A total of 110 LAVA potentials recorded from 13 patients were analyzed. Notch filtering significantly affected the LAVA morphology and reduced their amplitude (the sum of the absolute value of the largest positive and negative voltages before filtering: 0.267 mV [0.191-0.395 mV]; after filtering: 0.172 mV [0.112-0.266 mV]; P < .001). At least 2 high-frequency components were introduced into the LAVA by filtering at 33 sites. The area under continuous LAVA was reduced by 28% from 24.64 cm2 (16.20-33.45 cm2) to 17.53 cm2 (10.52-23.82 cm2) (P < .001). The duration of continuous LAVA was reduced by 12% from 79.2 ms (55.0-93.0 ms) to 69.5 ms (53.0-88.5 ms) (P < .001). CONCLUSION Notch filtering can distort LAVA by reducing their amplitude, changing their morphology, and shortening their duration, leading to potential false positives and negatives. Mitigating the 60-Hz noise should focus on eliminating the source of noise, not applying notch filtering.
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Affiliation(s)
- Xiaoxiong Zhou
- The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yunqiu Jiang
- Section of Cardiovascular Diseases, Heart Rhythm Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; Cardiac Arrhythmias Section, Heart Center, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China
| | - Daniel Sohinki
- Division of Cardiology, Medical College of Georgia, Augusta, Georgia
| | - Wei Liu
- School of Computer Science and Technology, Xi'an University of Posts and Telecommunications, Xi'an, China
| | - Sunny S Po
- Section of Cardiovascular Diseases, Heart Rhythm Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
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31
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Extensive scar modification for the treatment of intra-atrial re-entrant tachycardia in patients after congenital heart surgery. Cardiol Young 2020; 30:1231-1237. [PMID: 32698928 DOI: 10.1017/s1047951120001900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Catheter ablation is an important therapeutic option for atrial tachycardias in patients with CHD. As a result of extensive scarring and surgical repair, multiple intra-atrial re-entrant tachycardia circuits develop and serve as a substrate for arrhythmias. The best ablation approach for patients with multiple intra-atrial re-entrant tachycardias has not been investigated. Here, we compared substrate-based ablation using extensive scar modification to conventional ablation. METHODS The present study included patients with surgically corrected CHD that underwent intra-atrial re-entrant tachycardia ablation. Extensive scar modification was defined as substrate ablation based on a dense voltage map, aimed to eliminate all potentials in the scar region. The control group had activation mapping-based ablation. A clinical composite endpoint was assessed. Points were given for type, number, and treatment of intra-atrial re-entrant tachycardia recurrence. RESULTS In 40 patients, 63 (extensive scar modification 13) procedures were performed. Acute procedural success was achieved in 78%. Procedural duration was similar in both groups. Forty-nine percent had a recurrence within 1 year. During a 5-year follow-up (2.5-7.5 years), 46% required repeat catheter ablation. Compared to baseline, clinical composite endpoint significantly decreased by 46% after 12 months (p = 0.001). Acute procedural success, procedural parameters, recurrence and repeat ablation were similar between extensive scar modification and activation mapping-based ablation. CONCLUSION Catheter ablation using extensive scar modification for intra-atrial re-entrant tachycardias occurring after surgically corrected CHD illustrated similar short- and long-term outcomes and procedural efficiency compared to catheter ablation using activation mapping-based ablation. The choice of ablation approach for multiple intra-atrial re-entrant tachycardia should remain at the discretion of the operator.
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32
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Frontera A, Melillo F, Baldetti L, Radinovic A, Bisceglia C, D'Angelo G, Foppoli L, Gigli L, Peretto G, Cireddu M, Sala S, Mazzone P, Della Bella P. High-Density Characterization of the Ventricular Electrical Substrate During Sinus Rhythm in Post-Myocardial Infarction Patients. JACC Clin Electrophysiol 2020; 6:799-811. [PMID: 32703562 DOI: 10.1016/j.jacep.2020.04.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 03/26/2020] [Accepted: 04/01/2020] [Indexed: 12/13/2022]
Abstract
OBJECTIVES The aim of this study was to characterize, during sinus rhythm, the electric activation abnormalities in post-myocardial infarction patients undergoing ablation of ventricular tachycardia (VT) in order to identify specific signatures of those abnormal electrograms (EGMs). BACKGROUND In the setting of VT ablation, substrate characterization hinges on the identification of local abnormal ventricular activity (LAVA) and late potentials (LPs) that are considered to be related to the VT circuit. METHODS Patients scheduled for VT ablation underwent high-density ventricular substrate mapping. The substrate map during sinus rhythm was then compared with the activation maps of the clinical VT. Abnormal EGMs (LAVA and LPs) during sinus rhythm were characterized according to their configuration, duration, and amplitude and distinguished as belonging to bystander region or to the re-entrant circuit. Underlying electrophysiological mechanisms (wave-front collision, slow conduction) were identified on the activation maps and assigned to corresponding EGMs. RESULTS Ten patients satisfied the criteria to be enrolled in the study. A mean of 5 ± 1 slow-conduction areas and 4 ± 2 wave-front collisions were identified. LAVA was due to slow conduction in 60.5%, followed by wave-front collision (17.5%). LPs were caused by slow conduction in 52% of cases and by wave-front collision in 43% of cases. During sinus rhythm, entrance and exit sites were characterized by LAVA, while at the VT isthmus, only LPs were identified. Cutoff values of duration <24.5 ms (95% sensitivity and 99% specificity) and amplitude <0.14 mV (90% sensitivity and 48.1% specificity) discriminated those LPs belonging to the circuit from those playing a bystander role. CONCLUSIONS In the setting of post-myocardial infarction cardiomyopathy, specific EGM signatures are expressions of distinct electrophysiological phenomena. LAVA and LPs may play a bystander or an active role in the VT circuit, but only LPs with low amplitude and short duration predicted the VT isthmus.
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Affiliation(s)
- Antonio Frontera
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy.
| | - Francesco Melillo
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Luca Baldetti
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Andrea Radinovic
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | | | - Giuseppe D'Angelo
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Luca Foppoli
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Lorenzo Gigli
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Giovanni Peretto
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Manuela Cireddu
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Simone Sala
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Patrizio Mazzone
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
| | - Paolo Della Bella
- Department of Arrhythmology, IRCCS San Raffaele Hospital, Milan, Italy
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33
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Zhang PP, Heeger CH, Mathew S, Fink T, Reissmann B, Lemeš C, Maurer T, Santoro F, Huang Y, Riedl J, Schmoeckel M, Rillig A, Metzner A, Kuck KH, Ouyang F. Left-lateral thoracotomy for catheter ablation of scar-related ventricular tachycardia in patients with inaccessible pericardial access. Clin Res Cardiol 2020; 110:801-809. [PMID: 32458110 PMCID: PMC8166673 DOI: 10.1007/s00392-020-01670-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 04/29/2020] [Indexed: 12/02/2022]
Abstract
Objectives We aimed to describe the feasibility of a surgical left thoracotomy for catheter ablation of scar-related ventricular tachycardia (VT) in patients with inaccessible pericardial access. Background Pericardial adhesion due to prior cardiac surgery or previous epicardial ablation procedures limits epicardial access in patients with drug-refractory VT originated from the epicardium. Methods Six patients who underwent a surgical left lateral thoracotomy epicardial access for catheter ablation of VT after failed subxiphoid percutaneous epicardial access were reviewed. Patients’ baseline characteristics and procedural characteristics including epicardial access, mapping, and ablation were described. Epicardial access was successfully obtained in all patients by a surgical left lateral thoracotomy. Results The reasons of pericardial adhesion were prior cardiac surgery (n = 3, 50%) and previous epicardial ablation procedures (n = 3, 50%). Epicardial mapping of the lateral and inferior left ventricle was acquired, and a total of 15 different VTs originated from those regions were abolished. Unless one patient with ST elevation myocardial infarction due to periprocedural occlusion of the posterior descending artery no further complications occurred. All patients were discharged 10.2 ± 4 days after the procedure. VT recurred in 1 patient (17%) and was controlled with oral amiodarone therapy during follow-up (median follow-up: 479 days). Conclusions A surgical left lateral thoracotomy is feasible and safe for selected patients. This approach provides epicardial ablation in patients with VT located at the infero-lateral left ventricle and pericardial adhesions due to previous cardiac surgery or previous ablation procedures. Graphic abstract ![]()
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Affiliation(s)
- Peng-Pai Zhang
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
- Department of Cardiology, Shanghai Xinhua Hospital Affiliated to Medical School of Shanghai Jiaotong University, Shanghai, China
| | - Christian-Hendrik Heeger
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
- Medical Clinic II (Department of Cardiology, Angiology and Intensive Care Medicine), University Hospital Schleswig-Holstein, University Heart Center Lübeck, Lübeck, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Lübeck, Lübeck, Germany
| | - Shibu Mathew
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Thomas Fink
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Bruno Reissmann
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Christine Lemeš
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Tilman Maurer
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Francesco Santoro
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - YingHao Huang
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Johannes Riedl
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Michael Schmoeckel
- Department of Cardiovascular Surgery, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Andreas Rillig
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Andreas Metzner
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Karl-Heinz Kuck
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Feifan Ouyang
- Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany.
- Fuwai Hospital/National Center of Cardiovascular Diseases, 167 North Lishi Road, Xicheng District, Beijing, 10037, China.
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Compagnucci P, Volpato G, Falanga U, Cipolletta L, Conti M, Grifoni G, Verticelli L, Schicchi N, Giovagnoni A, Casella M, Guerra F, Dello Russo A. Recent advances in three-dimensional electroanatomical mapping guidance for the ablation of complex atrial and ventricular arrhythmias. J Interv Card Electrophysiol 2020; 61:37-43. [PMID: 32451799 DOI: 10.1007/s10840-020-00781-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/11/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE To provide a brief overview of some relevant technological advances in the field of three-dimensional electroanatomical mapping (3D-EAM) that have recently entered the clinical arena and their role in guiding catheter ablation (CA) of complex atrial and ventricular arrhythmias. METHODS In this technical report, we describe the general features of three novel algorithms featured in the updated CARTO PRIME™ mapping module for CARTO®3 version 7 3D-EAM system (Biosense Webster Inc., Diamond Bar, CA, USA): local activation time (LAT) hybrid, coherent mapping and map replay modules. We also report three challenging arrhythmia cases in which CA was successfully guided by these softwares. RESULTS The LAT hybrid module was used in a case of premature ventricular complex originating from the right coronary cusp. This algorithm facilitated safe positioning of the ablation catheter away from the right coronary ostium, avoiding potential harm to this vital structure. The coherent mapping module helped to identify the critical as well as a bystander isthmus of an atrial macro-re-entrant tachycardia in a grown-up patient with congenital heart disease. The map replay module allowed rapid retrospective activation mapping of two unstable ventricular tachycardias in a case of nonischemic cocaine-associated cardiomyopathy. CONCLUSION 3D-EAM systems offer significant advantages in the management of challenging arrhythmias, and the introduction of novel algorithms underpins improvements in patients' outcomes. Given the increasing sophistication of these systems, however, a close collaboration among cardiac electrophysiologists, engineers and technicians is highly needed in order to get the best from the available technology.
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Affiliation(s)
- Paolo Compagnucci
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy.
| | - Giovanni Volpato
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy
| | - Umberto Falanga
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy
| | - Laura Cipolletta
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy
| | - Manuel Conti
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy
| | - Gino Grifoni
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy
| | - Letizia Verticelli
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy
| | - Nicolò Schicchi
- Radiology Department, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy
| | - Andrea Giovagnoni
- Radiology Department, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy.,Department of Clinical, Special and Dental Sciences, Marche Polytechnic University, Ancona, Italy
| | - Michela Casella
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy.,Department of Clinical, Special and Dental Sciences, Marche Polytechnic University, Ancona, Italy
| | - Federico Guerra
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy.,Department of Biomedical Science and Public Health, Marche Polytechnic University, Ancona, Italy
| | - Antonio Dello Russo
- Cardiology and Arrhythmology Clinic, University Hospital "Ospedali Riuniti Umberto I - Lancisi - Salesi", Ancona, Italy.,Department of Biomedical Science and Public Health, Marche Polytechnic University, Ancona, Italy
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35
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Kim Y, Chen S, Ernst S, Guzman CE, Han S, Kalarus Z, Labadet C, Lin Y, Lo L, Nogami A, Saad EB, Sapp J, Sticherling C, Tilz R, Tung R, Kim YG, Stiles MK. 2019 APHRS expert consensus statement on three-dimensional mapping systems for tachycardia developed in collaboration with HRS, EHRA, and LAHRS. J Arrhythm 2020; 36:215-270. [PMID: 32256872 PMCID: PMC7132207 DOI: 10.1002/joa3.12308] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 01/20/2020] [Indexed: 12/24/2022] Open
Affiliation(s)
- Young‐Hoon Kim
- Department of Internal MedicineArrhythmia CenterKorea University Medicine Anam HospitalSeoulRepublic of Korea
| | - Shih‐Ann Chen
- Division of CardiologyDepartment of MedicineTaipei Veterans General HospitalTaipeiROC
| | - Sabine Ernst
- Department of CardiologyRoyal Brompton and Harefield HospitalImperial College LondonLondonUK
| | | | - Seongwook Han
- Division of CardiologyDepartment of Internal MedicineKeimyung University School of MedicineDaeguRepublic of Korea
| | - Zbigniew Kalarus
- Department of CardiologyMedical University of SilesiaKatowicePoland
| | - Carlos Labadet
- Cardiology DepartmentArrhythmias and Electrophysiology ServiceClinica y Maternidad Suizo ArgentinaBuenos AiresArgentina
| | - Yenn‐Jian Lin
- Division of CardiologyDepartment of MedicineTaipei Veterans General HospitalTaipeiROC
| | - Li‐Wei Lo
- Division of CardiologyDepartment of MedicineTaipei Veterans General HospitalTaipeiROC
| | - Akihiko Nogami
- Department of CardiologyFaculty of MedicineUniversity of TsukubaTsukubaJapan
| | - Eduardo B. Saad
- Center for Atrial FibrillationHospital Pro‐CardiacoRio de JaneiroBrazil
| | - John Sapp
- Division of CardiologyDepartment of MedicineQEII Health Sciences CentreDalhousie UniversityHalifaxNSCanada
| | | | - Roland Tilz
- Medical Clinic II (Department of Cardiology, Angiology and Intensive Care Medicine)University Hospital Schleswig‐Holstein (UKSH) – Campus LuebeckLuebeckGermany
| | - Roderick Tung
- Center for Arrhythmia CarePritzker School of MedicineUniversity of Chicago MedicineChicagoILUSA
| | - Yun Gi Kim
- Department of Internal MedicineArrhythmia CenterKorea University Medicine Anam HospitalSeoulRepublic of Korea
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36
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Aronis KN, Ali RL, Prakosa A, Ashikaga H, Berger RD, Hakim JB, Liang J, Tandri H, Teng F, Chrispin J, Trayanova NA. Accurate Conduction Velocity Maps and Their Association With Scar Distribution on Magnetic Resonance Imaging in Patients With Postinfarction Ventricular Tachycardias. Circ Arrhythm Electrophysiol 2020; 13:e007792. [PMID: 32191131 DOI: 10.1161/circep.119.007792] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Characterizing myocardial conduction velocity (CV) in patients with ischemic cardiomyopathy (ICM) and ventricular tachycardia (VT) is important for understanding the patient-specific proarrhythmic substrate of VTs and therapeutic planning. The objective of this study is to accurately assess the relation between CV and myocardial fibrosis density on late gadolinium-enhanced cardiac magnetic resonance imaging (LGE-CMR) in patients with ICM. METHODS We enrolled 6 patients with ICM undergoing VT ablation and 5 with structurally normal left ventricles (controls) undergoing premature ventricular contraction or VT ablation. All patients underwent LGE-CMR and electroanatomic mapping (EAM) in sinus rhythm (2960 electroanatomic mapping points analyzed). We estimated CV from electroanatomic mapping local activation time using the triangulation method that provides an accurate estimate of CV as it accounts for the direction of wavefront propagation. We evaluated the association between LGE-CMR intensity and CV with multilevel linear mixed models. RESULTS Median CV in patients with ICM and controls was 0.41 m/s and 0.65 m/s, respectively. In patients with ICM, CV in areas with no visible fibrosis was 0.81 m/s (95% CI, 0.59-1.12 m/s). For each 25% increase in normalized LGE intensity, CV decreased by 1.34-fold (95% CI, 1.25-1.43). Dense scar areas have, on average, 1.97- to 2.66-fold slower CV compared with areas without dense scar. Ablation lesions that terminated VTs were localized in areas of slow conduction on CV maps. CONCLUSIONS CV is inversely associated with LGE-CMR fibrosis density in patients with ICM. Noninvasive derivation of CV maps from LGE-CMR is feasible. Integration of noninvasive CV maps with electroanatomic mapping during substrate mapping has the potential to improve procedural planning and outcomes. Visual Overview: A visual overview is available for this article.
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Affiliation(s)
- Konstantinos N Aronis
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Johns Hopkins University (K.N.A., R.L.A., A.P., J.B.H., J.L., F.T., N.A.T.).,Section of Electrophysiology, Division of Cardiology, Johns Hopkins Hospital, Baltimore, MD (K.N.A., H.A., R.D.B., H.T., J.C.)
| | - Rheeda L Ali
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Johns Hopkins University (K.N.A., R.L.A., A.P., J.B.H., J.L., F.T., N.A.T.)
| | - Adityo Prakosa
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Johns Hopkins University (K.N.A., R.L.A., A.P., J.B.H., J.L., F.T., N.A.T.)
| | - Hiroshi Ashikaga
- Section of Electrophysiology, Division of Cardiology, Johns Hopkins Hospital, Baltimore, MD (K.N.A., H.A., R.D.B., H.T., J.C.)
| | - Ronald D Berger
- Section of Electrophysiology, Division of Cardiology, Johns Hopkins Hospital, Baltimore, MD (K.N.A., H.A., R.D.B., H.T., J.C.)
| | - Joe B Hakim
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Johns Hopkins University (K.N.A., R.L.A., A.P., J.B.H., J.L., F.T., N.A.T.)
| | - Jialiu Liang
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Johns Hopkins University (K.N.A., R.L.A., A.P., J.B.H., J.L., F.T., N.A.T.)
| | - Harikrishna Tandri
- Section of Electrophysiology, Division of Cardiology, Johns Hopkins Hospital, Baltimore, MD (K.N.A., H.A., R.D.B., H.T., J.C.)
| | - Fei Teng
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Johns Hopkins University (K.N.A., R.L.A., A.P., J.B.H., J.L., F.T., N.A.T.)
| | - Jonathan Chrispin
- Section of Electrophysiology, Division of Cardiology, Johns Hopkins Hospital, Baltimore, MD (K.N.A., H.A., R.D.B., H.T., J.C.)
| | - Natalia A Trayanova
- Alliance for Cardiovascular Diagnostic and Treatment Innovation, Johns Hopkins University (K.N.A., R.L.A., A.P., J.B.H., J.L., F.T., N.A.T.)
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37
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Clinical, procedural and long-term outcome of ischemic VT ablation in patients with previous anterior versus inferior myocardial infarction. Clin Res Cardiol 2020; 109:1282-1291. [PMID: 32157380 PMCID: PMC7515937 DOI: 10.1007/s00392-020-01622-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 02/19/2020] [Indexed: 11/06/2022]
Abstract
Background Outcome of ischemic VT ablation may differ between patients with previous myocardial infarction (MI) in relation to infarct localization. Methods We analyzed procedural data, acute and long-term outcomes of 152 consecutive patients (139 men, mean age 67 ± 9 years) with previous anterior or inferior MI who underwent ischemic VT ablation at our institution between January 2010 and October 2015. Results More patients had a history of inferior MI (58%). Mean ejection fraction was significantly lower in anterior MI patients (28 ± 10% vs. 34 ± 10%, p < 0.001). NYHA class and presence of comorbidities were not different between the groups. Indication for the procedure was electrical storm in 43% of patients, and frequent implantable cardioverter defibrillator (ICD) therapies in 57%, and did not differ significantly between anterior and inferior MI patients. A mean of 3 ± 2 VT morphologies were inducible, with a trend towards more VT in the anterior MI group (3.1 ± 2.2 vs. 2.6 ± 1.9, p = 0.18). Procedural parameters and acute success did not differ between the groups. During a mean follow-up of 3 ± 2 years, more anterior MI patients had undergone a re-ablation (49% vs. 33%, p = 0.09, Chi-square test). There was a trend towards more ICD shocks in patients with previous anterior MI (46% vs. 34%). After adjusting for risk factors and ejection fraction, multivariable Cox regression analyses showed no significant difference in mortality (p = 0.78) and cardiovascular mortality between infarct localizations (p = 0.6). Conclusion Clinical characteristics of patients with anterior and inferior MI are similar except for ejection fraction. Patients with inferior MI appear to have better outcome regarding survival, ICD shocks and re-ablation, but this appears to be related to better ejection fraction when compared with anterior MI.
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38
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Kubala M, Xie S, Santangeli P, Garcia FC, Supple GE, Schaller RD, Liang JJ, Pathak RK, Zado ES, Tschabrunn C, Arkles J, Callans DJ, Marchlinski FE. Analysis of local ventricular repolarization using unipolar recordings in patients with arrhythmogenic right ventricular cardiomyopathy. J Interv Card Electrophysiol 2020; 57:261-270. [DOI: 10.1007/s10840-019-00594-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 07/10/2019] [Indexed: 10/26/2022]
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39
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Kuo L, Liang JJ, Nazarian S, Marchlinski FE. Multimodality Imaging to Guide Ventricular Tachycardia Ablation in Patients with Non-ischaemic Cardiomyopathy. Arrhythm Electrophysiol Rev 2020; 8:255-264. [PMID: 32685156 PMCID: PMC7358957 DOI: 10.15420/aer.2019.37.3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Catheter ablation is an effective treatment option for ventricular tachycardia (VT) in patients with non-ischaemic cardiomyopathy (NICM). The heterogeneous nature of NICM aetiologies and VT substrate in patients with NICM play a role in long-term ablation outcomes in this population. Over the past decades, more precise identification of NICM aetiologies and better characterisation of various substrates have been made. Application of multimodal imaging has greatly contributed to the accurate diagnosis of NICM subtypes and improved VT ablation strategies. This article summarises the current knowledge of multimodal imaging used in the characterisation of non-ischaemic NICM substrates, procedural planning and image integration for the optimisation of VT ablation.
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Affiliation(s)
- Ling Kuo
- Heart Rhythm Center, Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jackson J Liang
- Electrophysiology Section, Cardiovascular Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, US
| | - Saman Nazarian
- Electrophysiology Section, Cardiovascular Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, US
| | - Francis E Marchlinski
- Electrophysiology Section, Cardiovascular Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, US
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40
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Santangeli P, Marchlinski FE. Ablation Therapy for Refractory Ventricular Arrhythmias. Annu Rev Med 2020; 71:177-190. [PMID: 31747356 DOI: 10.1146/annurev-med-041818-020033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recurrent ventricular arrhythmias (VAs) are a leading cause of cardiovascular morbidity and mortality. In the last three decades, important advancements have occurred in the understanding of the mechanisms of recurrent VAs, their prognostic implications in different clinical contexts, and their treatment options. VAs occur in structurally normal hearts as well as in patients with underlying heart disease, but the latter group has a particularly high risk of recurrent VAs. Catheter ablation offers the possibility of cure for a substantial proportion of patients. Research has focused on identifying optimal targets for ablation, correlating the underlying structural abnormalities with the site of origin of VAs, and determining the optimal procedural approach. Ablation therapy can be life-saving in select patients with high burden of repetitive VAs or advanced heart failure syndromes. This article focuses on clinical aspects of catheter ablation of VAs, particularly the selection and clinical management of patients undergoing catheter ablation procedures and expected outcomes.
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Affiliation(s)
- Pasquale Santangeli
- Cardiac Electrophysiology Section, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA; ,
| | - Francis E Marchlinski
- Cardiac Electrophysiology Section, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA; ,
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Urolithin B improves cardiac function and reduces susceptibility to ventricular arrhythmias in rats after myocardial infarction. Eur J Pharmacol 2020; 871:172936. [PMID: 31958459 DOI: 10.1016/j.ejphar.2020.172936] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 12/15/2022]
Abstract
Cardiac fibrosis and inflammation play critical roles in ventricular remodelling after myocardial infarction (MI). Urolithin B (UB), a metabolite of ellagitannin-rich foods, has various biological activities, but its effect on ventricular remodelling after MI has not been determined. The present study evaluated whether UB inhibited ventricular structural remodelling and decreased the occurrence of ventricular arrhythmias after MI. Sprague-Dawley (SD) rats underwent ligation of the left anterior descending coronary artery before randomization to receive phosphate-buffered saline (PBS) or UB at doses of 2.5 mg/kg/day and 5 mg/kg/day via intraperitoneal administration or sham ligation. Cardiac function was assessed using echocardiography, haemodynamic detection and brain natriuretic peptide (BNP) levels 2 weeks post-MI. Hearts were used for electrophysiological testing and molecular and histological analyses. UB (5 mg/kg/day) significantly protected against post-MI cardiac dysfunction. UB markedly reduced infarct areas and myocyte size and attenuated cardiac fibrosis and inflammation post-MI. UB decreased the incidence of ventricular tachycardia and ventricular fibrillation compared to the MI group. We determined that UB inhibited the phosphorylation of JAK2/STAT3 and Smad2/3 signalling molecules. Our data suggest that UB reduces the occurrence of malignant ventricular arrhythmias after MI, which is likely associated with attenuation of ventricular structural remodelling via inactivation of the JAK2/STAT3 and Smad2/3 signalling pathway.
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Graham AJ, Orini M, Zacur E, Dhillon G, Daw H, Srinivasan NT, Martin C, Lane J, Mansell JS, Cambridge A, Garcia J, Pugliese F, Segal O, Ahsan S, Lowe M, Finlay M, Earley MJ, Chow A, Sporton S, Dhinoja M, Hunter RJ, Schilling RJ, Lambiase PD. Evaluation of ECG Imaging to Map Hemodynamically Stable and Unstable Ventricular Arrhythmias. Circ Arrhythm Electrophysiol 2020; 13:e007377. [PMID: 31934784 DOI: 10.1161/circep.119.007377] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND ECG imaging (ECGI) has been used to guide treatment of ventricular ectopy and arrhythmias. However, the accuracy of ECGI in localizing the origin of arrhythmias during catheter ablation of ventricular tachycardia (VT) in structurally abnormal hearts remains to be fully validated. METHODS During catheter ablation of VT, simultaneous mapping was performed using electroanatomical mapping (CARTO, Biosense-Webster) and ECGI (CardioInsight, Medtronic) in 18 patients. Sites of entrainment, pace-mapping, and termination during ablation were used to define the VT site of origin (SoO). Distance between SoO and the site of earliest activation on ECGI were measured using co-registered geometries from both systems. The accuracy of ECGI versus a 12-lead surface ECG algorithm was compared. RESULTS A total of 29 VTs were available for comparison. Distance between SoO and sites of earliest activation in ECGI was 22.6, 13.9 to 36.2 mm (median, first to third quartile). ECGI mapped VT sites of origin onto the correct AHA segment with higher accuracy than a validated 12-lead ECG algorithm (83.3% versus 38.9%; P=0.015). CONCLUSIONS This simultaneous assessment demonstrates that CardioInsight localizes VT circuits with sufficient accuracy to provide a region of interest for targeting mapping for ablation. Resolution is not sufficient to guide discrete radiofrequency lesion delivery via catheter ablation without concomitant use of an electroanatomical mapping system but may be sufficient for segmental ablation with radiotherapy.
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Affiliation(s)
- Adam J Graham
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Michele Orini
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.).,Institute of Cardiovascular Science, University College London, United Kingdom (M.O., P.D.L.)
| | - Ernesto Zacur
- Institute of Biomedical Engineering, University of Oxford, United Kingdom (E.Z.)
| | - Gurpreet Dhillon
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Holly Daw
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Neil T Srinivasan
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Claire Martin
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Jem Lane
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Josephine S Mansell
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Alex Cambridge
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Jason Garcia
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Francesca Pugliese
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Oliver Segal
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Syed Ahsan
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Martin Lowe
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Malcolm Finlay
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Mark J Earley
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Anthony Chow
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Simon Sporton
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Mehul Dhinoja
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Ross J Hunter
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Richard J Schilling
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.)
| | - Pier D Lambiase
- Barts Heart Centre, Barts Health NHS Trust, London, United Kingdom (A.J.G., M.O., G.D., H.D., N.T.S., C.M., J.L., J.S.M., A.C., J.G., F.P., O.S., S.A., M.L., M.F., M.J.E., A.C., S.S., M.D., R.J.H., R.J.S., P.D.L.).,Institute of Cardiovascular Science, University College London, United Kingdom (M.O., P.D.L.)
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Raatikainen P. Hybrid Therapy as a Last Resort in the Treatment of Complex Ventricular Tachyarrhythmias. Cardiology 2020; 145:95-97. [PMID: 31931501 DOI: 10.1159/000505178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 12/02/2019] [Indexed: 11/19/2022]
Affiliation(s)
- Pekka Raatikainen
- Division of Cardiology, Heart and Lung Center, Helsinki University Hospital, Helsinki, Finland,
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Ueda A, Soejima K, Nakahara S, Fukuda R, Fukamizu S, Kawamura I, Miwa Y, Mohri T, Katsume Y. Conduction slowing area during sinus rhythm harbors ventricular tachycardia isthmus. J Cardiovasc Electrophysiol 2020; 31:440-449. [PMID: 31916643 DOI: 10.1111/jce.14339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 12/19/2019] [Accepted: 01/03/2020] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The voltage map during sinus rhythm (SR) is a cornerstone of substrate mapping (SM) in scar-related ventricular tachycardia (VT) and frequently used with pace mapping (PM). Where to conduct PM is unclear in cases of an extensive or unidentified substrate. Conduction properties are another aspect incorporated by SM, and conduction slowing has gained interest as being related to successful ablation, although its mechanism has not been elucidated. We aimed to investigate the relationship between SR conduction properties and VT isthmuses. METHODS Nineteen patients (mean age, 62 years) who underwent VT ablation with voltage mapping and PM were reviewed. Isochronal late activation maps (ILAMs) with eight zones were reconstructed and sequentially named from one to eight according to the SR propagation. Good PM sites were superimposed on ILAMs, and the isthmus was defined using different pacing latencies. ILAM properties harboring isthmuses were investigated. RESULTS Twenty-eight ILAMs (13 epicardium, 1 right ventricular [RV], and 14 left ventricular [LV] endocardium) were reviewed. Eighteen isthmuses of 24 target VTs were identified, in which the proximal ends were in a later zone than the distal ends (zone 6 vs 4; P < .001), suggesting a reverse isthmus vector to the SR. The conduction velocity of the zone involving the distal isthmus was significantly lower than that of the SR preceding zone (0.40 vs 1.30 m/s; P < .001). SR conduction velocity decelerated by 69.5% (range 59.7%-74.5%) before propagating into the isthmus area. CONCLUSION Conduction slowing area during SR were related with the exit portion of the VT isthmuses.
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Affiliation(s)
- Akiko Ueda
- Division of Advanced Arrhythmia Management, Kyorin University Hospital, Mitaka, Tokyo, Japan
| | - Kyoko Soejima
- Department of Cardiovascular Medicine, Kyorin University Hospital, Mitaka, Tokyo, Japan
| | - Shiro Nakahara
- Department of Cardiology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Reiko Fukuda
- Department of Cardiology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Seiji Fukamizu
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, Shibuya-ku, Tokyo, Japan
| | - Iwanari Kawamura
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, Shibuya-ku, Tokyo, Japan
| | - Yosuke Miwa
- Department of Cardiovascular Medicine, Kyorin University Hospital, Mitaka, Tokyo, Japan
| | - Takato Mohri
- Department of Cardiovascular Medicine, Kyorin University Hospital, Mitaka, Tokyo, Japan
| | - Yumi Katsume
- Department of Cardiovascular Medicine, Kyorin University Hospital, Mitaka, Tokyo, Japan
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Bacharova L. Missing Link between Molecular Aspects of Ventricular Arrhythmias and QRS Complex Morphology in Left Ventricular Hypertrophy. Int J Mol Sci 2019; 21:E48. [PMID: 31861705 PMCID: PMC6982310 DOI: 10.3390/ijms21010048] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/17/2019] [Accepted: 12/17/2019] [Indexed: 12/27/2022] Open
Abstract
The aim of this opinion paper is to point out the knowledge gap between evidence on the molecular level and clinical diagnostic possibilities in left ventricular hypertrophy (LVH) regarding the prediction of ventricular arrhythmias and monitoring the effect of therapy. LVH is defined as an increase in left ventricular size and is associated with increased occurrence of ventricular arrhythmia. Hypertrophic rebuilding of myocardium comprises interrelated processes on molecular, subcellular, cellular, tissue, and organ levels affecting electrogenesis, creating a substrate for triggering and maintaining arrhythmias. The knowledge of these processes serves as a basis for developing targeted therapy to prevent and treat arrhythmias. In the clinical practice, the method for recording electrical phenomena of the heart is electrocardiography. The recognized clinical electrocardiogram (ECG) predictors of ventricular arrhythmias are related to alterations in electrical impulse propagation, such as QRS complex duration, QT interval, early repolarization, late potentials, and fragmented QRS, and they are not specific for LVH. However, the simulation studies have shown that the QRS complex patterns documented in patients with LVH are also conditioned remarkably by the alterations in impulse propagation. These QRS complex patterns in LVH could be potentially recognized for predicting ventricular arrhythmia and for monitoring the effect of therapy.
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Affiliation(s)
- Ljuba Bacharova
- International Laser Center, 841 04 Bratislava, Slovakia
- Institute of Pathophysiology, Medical School, Comenius University, 841 04 Bratislava, Slovakia
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Ventricular Tachycardia Ablation. JACC Clin Electrophysiol 2019; 5:1363-1383. [DOI: 10.1016/j.jacep.2019.09.015] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 09/23/2019] [Accepted: 09/26/2019] [Indexed: 11/23/2022]
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Evaluation of the reentry vulnerability index to predict ventricular tachycardia circuits using high-density contact mapping. Heart Rhythm 2019; 17:576-583. [PMID: 31751771 PMCID: PMC7105818 DOI: 10.1016/j.hrthm.2019.11.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Indexed: 11/24/2022]
Abstract
Background Identifying arrhythmogenic sites to improve ventricular tachycardia (VT) ablation outcomes remains unresolved. The reentry vulnerability index (RVI) combines activation and repolarization timings to identify sites critical for reentrant arrhythmia initiation without inducing VT. Objective The purpose of this study was to provide the first assessment of RVI’s capability to identify VT sites of origin using high-density contact mapping and comparison with other activation-repolarization markers of functional substrate. Methods Eighteen VT ablation patients (16 male; 72% ischemic) were studied. Unipolar electrograms were recorded during ventricular pacing and analyzed offline. Activation time (AT), activation–recovery interval (ARI), and repolarization time (RT) were measured. Vulnerability to reentry was mapped based on RVI and spatial distribution of AT, ARI, and RT. The distance from sites identified as vulnerable to reentry to the VT site of origin was measured, with distances <10 mm and >20 mm indicating accurate and inaccurate localization, respectively. Results The origins of 18 VTs (6 entrainment, 12 pace-mapping) were identified. RVI maps included 1012 (408–2098) (median, 1st–3rd quartiles) points per patient. RVI accurately localized 72.2% VT sites of origin, with median distance of 5.1 (3.2–10.1) mm. Inaccurate localization was significantly less frequent for RVI than AT (5.6% vs 33.3%; odds ratio 0.12; P = .035). Compared to RVI, distance to VT sites of origin was significantly larger for sites showing prolonged RT and ARI and were nonsignificantly larger for sites showing highest AT and ARI gradients. Conclusion RVI identifies vulnerable regions closest to VT sites of origin. Activation-repolarization metrics may improve VT substrate delineation and inform novel ablation strategies.
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Lee A, Walters TE, Alhede C, Vittinghoff E, Sievers R, Gerstenfeld EP. Standard peak-to-peak bipolar voltage amplitude criteria underestimate myocardial scar during substrate mapping with a novel microelectrode catheter. Heart Rhythm 2019; 17:476-484. [PMID: 31606463 DOI: 10.1016/j.hrthm.2019.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Ventricular bipolar voltage values <0.5 and <1.0/1.5 mV (epi- and endocardium) correlating with dense scar and border zone, respectively, were established using a 3.5-mm tip catheter. Novel microelectrode catheters promise improved mapping resolution; however, whether standard voltage criteria apply to catheters with smaller electrode size and interelectrode distance remains unclear. OBJECTIVE The purpose of this study was to determine whether traditional bipolar voltage criteria for scar apply during substrate mapping with a microelectrode catheter. METHODS Paired bipolar and microbipolar voltage values were acquired from control swine (n = 2) using the microelectrode catheter and assessed for systemic differences. In a postinfarction swine model (n = 6), scar characteristics were compared between the bipolar maps and microbipolar maps using both standard and adjusted voltage criteria derived from the control animals. RESULTS In control swine, although 5th percentile values for bipolar and microbipolar voltage were similar (1.12 vs 1.22 mV [left ventricular (LV) endo]; 0.88 mV vs 0.98 mV [epi]), median values were significantly greater when acquired by microbipolar electrodes (3.60 vs 6.76 mV, P = .002 [LV endo]; 2.61 vs 2.72 mV, P = .02 [epi]). Microbipolar values were systematically larger by 2.0× and 1.4× in the LV endocardium and epicardium, respectively. Application of standard voltage values to microbipolar maps in postinfarct swine underestimated scar area by approximately 41% in the LV endocardium (13.7 vs 33.4 cm2, P = .004). CONCLUSION Bipolar voltage values acquired from microelectrodes are systemically larger than those acquired from standard catheters. New reference values should be established for these novel catheters.
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Affiliation(s)
- Adam Lee
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California San Francisco, San Francisco, California
| | - Tomos E Walters
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California San Francisco, San Francisco, California
| | - Christina Alhede
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California San Francisco, San Francisco, California
| | - Eric Vittinghoff
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California San Francisco, San Francisco, California
| | - Richard Sievers
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California San Francisco, San Francisco, California
| | - Edward P Gerstenfeld
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California San Francisco, San Francisco, California.
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Neuzner J, Dietze T, Paliege R, Gradaus R. Effectiveness of a percutaneous left ventricular assist device in preventing acute hemodynamic decompensation during catheter ablation of ventricular tachycardia in advanced heart failure patients: A retrospective single‐center analysis. J Cardiovasc Electrophysiol 2019; 30:2864-2868. [DOI: 10.1111/jce.14199] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/01/2019] [Accepted: 09/18/2019] [Indexed: 11/27/2022]
Affiliation(s)
- Jörg Neuzner
- B.Braun Ambulantes Herzzentrum KasselKassel Germany
| | | | - Robert Paliege
- Gemeinschaftspraxis Klinikum Kassel, Department of CardiologyKassel Germany
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Tritto M, Renzullo E, Zagari D, Moretti P. Right ventricular free-wall scar: an exceptional source of post-infarction ventricular tachycardia. A case report. EUROPEAN HEART JOURNAL-CASE REPORTS 2019; 3:5488152. [PMID: 31449624 PMCID: PMC6601154 DOI: 10.1093/ehjcr/ytz067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 09/20/2018] [Accepted: 04/13/2019] [Indexed: 11/13/2022]
Abstract
BACKGROUND In patients with coronary artery disease, ventricular tachycardia (VT) is usually related to left ventricular (LV) post-infarction scars. CASE SUMMARY A case of a 78-year-old man with post-infarction VT originating from the right ventricular (RV) free wall is described. Following recurrent episodes of VT with left bundle branch block morphology and left superior axis deviation, a patient with prior myocardial infarction was submitted to catheter ablation. Two areas of abnormal bipolar electrograms were observed at 3D electroanatomical mapping: one located at the basal aspect of the posterior and postero-septal LV, and the other one extending from the antero-lateral to the posterior mid-basal RV free wall. Ventricular late potentials (LPs) were recorded within both scars, but only pacing from those located in the RV resulted in long stimulus-to-QRS latency and optimal pace-mapping. Accordingly, this substrate was deemed the culprit of the clinical VT. Radiofrequency catheter ablation aimed at eliminating all LPs recorded from both scars was effective in preventing VT recurrences at follow-up. DISCUSSION A post-infarction RV free-wall scar may exceptionally be responsible of VT occurrence. Right ventricular mapping should be considered in selected cases based on 12-lead electrocardiogram VT morphology and prior RV infarct.
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Affiliation(s)
- Massimo Tritto
- Electrophysiology and Cardiac Pacing Unit, Humanitas Mater Domini Hospital, Via Gerenzano, 2, Castellanza, Varese, Italy
| | - Elvira Renzullo
- Electrophysiology and Cardiac Pacing Unit, Humanitas Mater Domini Hospital, Via Gerenzano, 2, Castellanza, Varese, Italy
| | - Domenico Zagari
- Electrophysiology and Cardiac Pacing Unit, Humanitas Mater Domini Hospital, Via Gerenzano, 2, Castellanza, Varese, Italy
| | - Paolo Moretti
- Electrophysiology and Cardiac Pacing Unit, Humanitas Mater Domini Hospital, Via Gerenzano, 2, Castellanza, Varese, Italy
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