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Grossi S, Bianchi F, Pintor C, Musumeci G, Gaita F. Transcatheter ablation in patients with Brugada syndrome. Eur Heart J Suppl 2023; 25:C38-C43. [PMID: 37125303 PMCID: PMC10132615 DOI: 10.1093/eurheartjsupp/suad005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Since the first description of Brugada syndrome (BrS), several studies were carried out aimed at diagnosis, arrhythmic risk stratification, and available strategies for sudden death prevention. In high-risk patients, the use of an implantable cardiac defibrillator was an evident option since the first description of the syndrome. Nevertheless, this strategy, while proven, as expected, to be effective in sudden death prevention, does not prevent arrhythmias and may not be an adequate or accepted solution for all patients. The need of a non-pharmacological therapy as a potential solution based on the electrophysiological mechanisms underlying the syndrome, led to search for substrate as target for catheter ablation. Advances in the tools, technology, and technical approach enabled to launch studies aimed at mapping the epicardium of patients with BrS in order to identify and ablate the substrate. As described in previous work and in our experience, an anatomically identifiable electrical substrate, which correspond to the typical ECG, is the ablation target. Complete substrate is better identified in a larger area with sodium-channel-blockers. Ablation of all abnormal electrical potentials is able to normalize the ECG and prevent arrhythmias induction. Encouraging preliminary data, if confirmed by longer follow-up and by multicentre randomized study, could change the whole therapeutic management in BrS patients.
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Affiliation(s)
- Stefano Grossi
- Corresponding author. Tel: +390115082368, Fax: +390115082209,
| | - Francesca Bianchi
- Department of Cardiology, AO Ordine Mauriziano, Largo Turati 62, Turin 10128, Italy
| | - Chiara Pintor
- Johnson & Johnson MedTech, Biosense Webster, Via del mare 56, 00071 Pomezia (Rome), Italy
| | - Giuseppe Musumeci
- Department of Cardiology, AO Ordine Mauriziano, Largo Turati 62, Turin 10128, Italy
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Kawano K, Shinohara T, Kondo H, Ishii Y, Takahashi M, Mitarai K, Hirota K, Fukui A, Akioka H, Teshima Y, Yufu K, Nakagawa M, Takahashi N. Risk stratification of ventricular fibrillation in patients with symptomatic Brugada syndrome using pharmacological tests. J Cardiovasc Electrophysiol 2023; 34:180-188. [PMID: 36352766 DOI: 10.1111/jce.15746] [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: 07/01/2022] [Revised: 10/11/2022] [Accepted: 11/04/2022] [Indexed: 11/11/2022]
Abstract
BACKGROUND Brugada syndrome (BrS), which is characterized by J-point elevation in right precordial leads of a 12-lead electrocardiogram, is associated with the occurrence of ventricular fibrillation (VF). However, risk stratification of VF in patients with BrS remains challenging. OBJECTIVE The aim of this study was to identify a risk predictor of VF in patients with BrS using pharmacological tests. METHODS Twenty-one consecutive patients with BrS and a history of documented spontaneous VF (n = 16) or syncope presumed to be caused by lethal ventricular arrhythmia (n = 5) were enrolled. J-wave changes in response to intravenous verapamil, propranolol, and pilsicainide were separately assessed. RESULTS During the median follow-up period of 86.0 months, 8 patients had VF recurrence (recurrence group) and 13 patients did not have VF recurrence (non-recurrence group). Intravenous propranolol injection induced significant J-wave augmentation (i.e., increase in amplitude >0.1 mV) in the inferior and/or lateral leads in the recurrence group compared to the non-recurrence group (p = .048 and p = .015, respectively). Kaplan-Meier analysis revealed that VF recurrence is significantly higher in patients with BrS and J-wave augmentation due to intravenous propranolol than in patients without J-wave augmentation (p = .014). CONCLUSION The study results show that propranolol-induced J-wave augmentation is involved in the risk of VF in patients with BrS. The results suggest that early repolarization patterns in response to pharmacological tests may be useful for risk stratification of VF in patients with symptomatic BrS.
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Affiliation(s)
- Kyoko Kawano
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Hidekazu Kondo
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Yumi Ishii
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Masaki Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kazuki Mitarai
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kei Hirota
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Akira Fukui
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Hidefumi Akioka
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Mikiko Nakagawa
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
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Balta A, Ceasovschih A, Șorodoc V, Dimitriadis K, Güzel S, Lionte C, Stătescu C, Sascău RA, Mantzouranis E, Sakalidis A, Vlachakis PK, Tsioufis P, Kordalis A, Tsiamis E, Tsioufis K, Șorodoc L. Broad Electrocardiogram Syndromes Spectrum: From Common Emergencies to Particular Electrical Heart Disorders. J Pers Med 2022; 12:jpm12111754. [PMID: 36573711 PMCID: PMC9697753 DOI: 10.3390/jpm12111754] [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] [Received: 09/09/2022] [Revised: 10/13/2022] [Accepted: 10/19/2022] [Indexed: 12/30/2022] Open
Abstract
Electrocardiogram (ECG) still remains a very useful diagnostic method in modern cardiology. Its broad availability, noninvasiveness and good sensitivity explain why it plays a capital role in the very beginning of the process of diagnosis for every patient, with or without cardiac-related complaints. For the practitioner, good training in ECG interpretation is mandatory. Sometimes, the ECG trace reveals particular aspects that may cause confusion and complicate decision-making. In this article, we present several less common situations underlying the general context and ECG features. The syndromes studied have a high pathological significance and may range from acute emergencies that call for a rapid therapeutical response to chronic syndromes that require prolonged observation, monitoring and risk stratification.
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Affiliation(s)
- Anastasia Balta
- Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
| | - Alexandr Ceasovschih
- Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Correspondence: (A.C.); (V.Ș.); (K.D.)
| | - Victorița Șorodoc
- 2nd Internal Medicine Department, Sf. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania
- Correspondence: (A.C.); (V.Ș.); (K.D.)
| | - Kyriakos Dimitriadis
- 1st Cardiology Clinic, Medical School, National and Kapodistrian University of Athens, Hippokration Hospital, 11527 Athens, Greece
- Correspondence: (A.C.); (V.Ș.); (K.D.)
| | - Sara Güzel
- Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
| | - Cătălina Lionte
- Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- 2nd Internal Medicine Department, Sf. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania
| | - Cristian Stătescu
- Cardiology Department, Cardiovascular Diseases Institute, 700503 Iasi, Romania
| | - Radu Andy Sascău
- Cardiology Department, Cardiovascular Diseases Institute, 700503 Iasi, Romania
| | - Emmanouil Mantzouranis
- 1st Cardiology Clinic, Medical School, National and Kapodistrian University of Athens, Hippokration Hospital, 11527 Athens, Greece
| | - Athanasios Sakalidis
- 1st Cardiology Clinic, Medical School, National and Kapodistrian University of Athens, Hippokration Hospital, 11527 Athens, Greece
| | - Panayotis K. Vlachakis
- 1st Cardiology Clinic, Medical School, National and Kapodistrian University of Athens, Hippokration Hospital, 11527 Athens, Greece
| | - Panagiotis Tsioufis
- 1st Cardiology Clinic, Medical School, National and Kapodistrian University of Athens, Hippokration Hospital, 11527 Athens, Greece
| | - Athanasios Kordalis
- 1st Cardiology Clinic, Medical School, National and Kapodistrian University of Athens, Hippokration Hospital, 11527 Athens, Greece
| | - Eleftherios Tsiamis
- 1st Cardiology Clinic, Medical School, National and Kapodistrian University of Athens, Hippokration Hospital, 11527 Athens, Greece
| | - Konstantinos Tsioufis
- 1st Cardiology Clinic, Medical School, National and Kapodistrian University of Athens, Hippokration Hospital, 11527 Athens, Greece
| | - Laurențiu Șorodoc
- Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- 2nd Internal Medicine Department, Sf. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania
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Marx M, Gass M, Michel-Behnke I. Generationenübergreifende Betreuung von Patienten mit tachykarden Rhythmusstörungen. Monatsschr Kinderheilkd 2022; 170:870-882. [PMID: 36105264 PMCID: PMC9461413 DOI: 10.1007/s00112-022-01591-9] [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] [Accepted: 08/08/2022] [Indexed: 11/26/2022]
Abstract
Die Versorgung von Patienten mit Rhythmusstörungen hat sich in den letzten Jahrzehnten von einer rein konservativ medikamentösen Therapie zu einer echten kurativen Therapie mit Beseitigung des arryhthmogenen Substrats durch technisch immer ausgereiftere Möglichkeiten im Sinn der elektrophysiologische Untersuchung (EPU) und Ablation entwickelt. Parallel dazu haben sich in pädiatrisch-kardiologischen Zentren rhythmologische Spezialambulanzen zur Betreuung von Patienten mit Ionenkanalerkrankungen etabliert. Deren Aufgabe besteht in der generationenübergreifenden Betreuung von ganzen Familien, mit dem Ziel, präventiv, durch entsprechende Beratung und Führung, maligne Rhythmusstörungen primär zu verhindern.
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Affiliation(s)
- Manfred Marx
- Klinische Abteilung für Pädiatrische Kardiologie, Universitätsklinik für Kinder- und Jugendheilkunde, Medizinische Universität Wien, Währinger Gürtel 18–20, 1090 Wien, Österreich
| | - Matthias Gass
- Klinische Abteilung für Pädiatrische Kardiologie, Universitätsklinik für Kinder- und Jugendheilkunde, Medizinische Universität Wien, Währinger Gürtel 18–20, 1090 Wien, Österreich
- Pädiatrische Kardiologie, Universitäts-Kinderklinik Zürich, Zürich, Schweiz
| | - Ina Michel-Behnke
- Klinische Abteilung für Pädiatrische Kardiologie, Universitätsklinik für Kinder- und Jugendheilkunde, Medizinische Universität Wien, Währinger Gürtel 18–20, 1090 Wien, Österreich
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Abstract
Brugada syndrome is a heritable channelopathy characterized by a peculiar electrocardiogram (ECG) pattern and increased risk of cardiac arrhythmias and sudden death. The arrhythmias originate because of an imbalance between the repolarizing and depolarizing currents that modulate the cardiac action potential. Even if an overt structural cardiomyopathy is not typical of Brugada syndrome, fibrosis and structural changes in the right ventricle contribute to a conduction slowing, which ultimately facilitates ventricular arrhythmias. Currently, Mendelian autosomal dominant transmission is detected in less than 25% of all clinical confirmed cases. Although 23 genes have been associated with the condition, only SCN5A, encoding the cardiac sodium channel, is considered clinically actionable and disease causing. The limited monogenic inheritance has pointed toward new perspectives on the possible complex genetic architecture of the disease, involving polygenic inheritance and a polygenic risk score that can influence penetrance and risk stratification. Expected final online publication date for the Annual Review of Genomics and Human Genetics, Volume 23 is October 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Marina Cerrone
- Leon H. Charney Division of Cardiology, Grossman School of Medicine, New York University, New York, NY, USA;
| | - Sarah Costa
- Department of Internal Medicine, Kantonsspital Baden, Baden, Switzerland
| | - Mario Delmar
- Leon H. Charney Division of Cardiology, Grossman School of Medicine, New York University, New York, NY, USA;
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Elsokkari I, Tsuji Y, Sapp JL, Nattel S. Recent insights into mechanisms and clinical approaches to electrical storm. Can J Cardiol 2021; 38:439-453. [PMID: 34979281 DOI: 10.1016/j.cjca.2021.12.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 12/21/2021] [Accepted: 12/30/2021] [Indexed: 12/14/2022] Open
Abstract
Electrical storm, characterized by repetitive ventricular tachycardia/fibrillation (VT/VF) over a short period, is becoming commoner with widespread use of implantable cardioverter-defibrillator (ICD) therapy. Electrical storm, sometimes called "arrhythmic storm" or "VT-storm", is usually a medical emergency requiring hospitalization and expert management, and significantly affects short- and long-term outcomes. This syndrome typically occurs in patients with underlying structural heart disease (ischemic or non-ischemic cardiomyopathy) or inherited channelopathies. Triggers for electrical storm should be sought but are often unidentifiable. Initial management is dictated by the hemodynamic status, while subsequent management typically involves ICD interrogation and reprogramming to reduce recurrent shocks, identification/management of triggers like electrolyte abnormalities, myocardial ischemia, or decompensated heart failure, and antiarrhythmic-drug therapy or catheter ablation. Sympathetic nervous system activation is central to the initiation and maintenance of arrhythmic storm, so autonomic modulation is a cornerstone of management. Sympathetic inhibition can be achieved with medications (particularly beta-adrenoreceptor blockers), deep sedation, or cardiac sympathetic denervation. More definitive management targets the underlying ventricular arrhythmia substrate to terminate and prevent recurrent arrhythmia. Arrhythmia targeting can be achieved with antiarrhythmic medications, catheter ablation or more novel therapies such as stereotactic radiation therapy that targets the arrhythmic substrate. Mechanistic studies point to adrenergic activation and other direct consequences of ICD-shocks in promoting further arrhythmogenesis and hypocontractility. Here, we review the pathophysiologic mechanisms, clinical features, prognosis, and therapeutic options for electrical storm. We also outline a clinical approach to this challenging and complex condition, along with its mechanistic basis.
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Affiliation(s)
- Ihab Elsokkari
- University of Sydney, Nepean Blue Mountains local health district, Australia
| | - Yukiomi Tsuji
- Department of Physiology of Visceral Function, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - John L Sapp
- Dalhousie University, Queen Elizabeth II Health Sciences Centre, Halifax, Nova Scotia, Canada.
| | - Stanley Nattel
- Departments of Medicine and Research Center, Montreal Heart Institute and Université de Montréal and Pharmacology and Therapeutics McGill University, Montreal, Quebec, Canada; Institute of Pharmacology, West German Heart and Vascular Center, University of Duisburg-Essen, Essen, Germany; IHU LIYRC Institute, Bordeaux, France.
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