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Peled Y, Ducharme A, Kittleson M, Bansal N, Stehlik J, Amdani S, Saeed D, Cheng R, Clarke B, Dobbels F, Farr M, Lindenfeld J, Nikolaidis L, Patel J, Acharya D, Albert D, Aslam S, Bertolotti A, Chan M, Chih S, Colvin M, Crespo-Leiro M, D'Alessandro D, Daly K, Diez-Lopez C, Dipchand A, Ensminger S, Everitt M, Fardman A, Farrero M, Feldman D, Gjelaj C, Goodwin M, Harrison K, Hsich E, Joyce E, Kato T, Kim D, Luong ML, Lyster H, Masetti M, Matos LN, Nilsson J, Noly PE, Rao V, Rolid K, Schlendorf K, Schweiger M, Spinner J, Townsend M, Tremblay-Gravel M, Urschel S, Vachiery JL, Velleca A, Waldman G, Walsh J. International Society for Heart and Lung Transplantation Guidelines for the Evaluation and Care of Cardiac Transplant Candidates-2024. J Heart Lung Transplant 2024; 43:1529-1628.e54. [PMID: 39115488 DOI: 10.1016/j.healun.2024.05.010] [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] [Received: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 08/18/2024] Open
Abstract
The "International Society for Heart and Lung Transplantation Guidelines for the Evaluation and Care of Cardiac Transplant Candidates-2024" updates and replaces the "Listing Criteria for Heart Transplantation: International Society for Heart and Lung Transplantation Guidelines for the Care of Cardiac Transplant Candidates-2006" and the "2016 International Society for Heart Lung Transplantation Listing Criteria for Heart Transplantation: A 10-year Update." The document aims to provide tools to help integrate the numerous variables involved in evaluating patients for transplantation, emphasizing updating the collaborative treatment while waiting for a transplant. There have been significant practice-changing developments in the care of heart transplant recipients since the publication of the International Society for Heart and Lung Transplantation (ISHLT) guidelines in 2006 and the 10-year update in 2016. The changes pertain to 3 aspects of heart transplantation: (1) patient selection criteria, (2) care of selected patient populations, and (3) durable mechanical support. To address these issues, 3 task forces were assembled. Each task force was cochaired by a pediatric heart transplant physician with the specific mandate to highlight issues unique to the pediatric heart transplant population and ensure their adequate representation. This guideline was harmonized with other ISHLT guidelines published through November 2023. The 2024 ISHLT guidelines for the evaluation and care of cardiac transplant candidates provide recommendations based on contemporary scientific evidence and patient management flow diagrams. The American College of Cardiology and American Heart Association modular knowledge chunk format has been implemented, allowing guideline information to be grouped into discrete packages (or modules) of information on a disease-specific topic or management issue. Aiming to improve the quality of care for heart transplant candidates, the recommendations present an evidence-based approach.
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Affiliation(s)
- Yael Peled
- Leviev Heart & Vascular Center, Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel; Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel.
| | - Anique Ducharme
- Deparment of Medicine, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada.
| | - Michelle Kittleson
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Neha Bansal
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Josef Stehlik
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Shahnawaz Amdani
- Department of Pediatric Cardiology, Cleveland Clinic Children's, Cleveland, Ohio, USA
| | - Diyar Saeed
- Heart Center Niederrhein, Helios Hospital Krefeld, Krefeld, Germany
| | - Richard Cheng
- Division of Cardiology, University of Washington, Seattle, WA, USA
| | - Brian Clarke
- Division of Cardiology, University of British Columbia, St Paul's Hospital, Vancouver, British Columbia, Canada
| | - Fabienne Dobbels
- Academic Centre for Nursing and Midwifery, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - Maryjane Farr
- Division of Cardiology, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX; Parkland Health System, Dallas, TX, USA
| | - JoAnn Lindenfeld
- Division of Cardiovascular Medicine, Vanderbilt University, Nashville, TN, USA
| | | | - Jignesh Patel
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Deepak Acharya
- Division of Cardiovascular Diseases, University of Arizona Sarver Heart Center, Tucson, Arizona, USA
| | - Dimpna Albert
- Department of Paediatric Cardiology, Paediatric Heart Failure and Cardiac Transplant, Heart Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Saima Aslam
- Division of Infectious Diseases and Global Public Health, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Alejandro Bertolotti
- Heart and Lung Transplant Service, Favaloro Foundation University Hospital, Buenos Aires, Argentina
| | - Michael Chan
- University of Alberta Hospital, Edmonton, Alberta, Canada
| | - Sharon Chih
- Heart Failure and Transplantation, Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Monica Colvin
- Department of Cardiology, University of Michigan, Ann Arbor, MI; Scientific Registry of Transplant Recipients, Hennepin Healthcare Research Institute, Minneapolis, MN, USA
| | - Maria Crespo-Leiro
- Cardiology Department Complexo Hospitalario Universitario A Coruna (CHUAC), CIBERCV, INIBIC, UDC, La Coruna, Spain
| | - David D'Alessandro
- Massachusetts General Hospital, Boston; Harvard School of Medicine, Boston, MA, USA
| | - Kevin Daly
- Boston Children's Hospital & Harvard Medical School, Boston, MA, USA
| | - Carles Diez-Lopez
- Advanced Heart Failure and Heart Transplant Unit, Department of Cardiology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Anne Dipchand
- Division of Cardiology, Department of Paediatrics, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | | | - Melanie Everitt
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Alexander Fardman
- Leviev Heart & Vascular Center, Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel; Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Marta Farrero
- Department of Cardiology, Hospital Clínic, Barcelona, Spain
| | - David Feldman
- Newark Beth Israel Hospital & Rutgers University, Newark, NJ, USA
| | - Christiana Gjelaj
- Department of Cardiovascular and Thoracic Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Matthew Goodwin
- Division of Cardiothoracic Surgery, University of Utah, Salt Lake City, UT, USA
| | - Kimberly Harrison
- Department of Pharmaceutical Services, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Eileen Hsich
- Cleveland Clinic Foundation, Division of Cardiovascular Medicine, Cleveland, OH, USA
| | - Emer Joyce
- Department of Cardiology, Mater University Hospital, Dublin, Ireland; School of Medicine, University College Dublin, Dublin, Ireland
| | - Tomoko Kato
- Department of Cardiology, International University of Health and Welfare School of Medicine, Narita, Chiba, Japan
| | - Daniel Kim
- University of Alberta & Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada
| | - Me-Linh Luong
- Division of Infectious Disease, Department of Medicine, University of Montreal Hospital Center, Montreal, Quebec, Canada
| | - Haifa Lyster
- Department of Heart and Lung Transplantation, The Royal Brompton and Harefield NHS Foundation Trust, Harefield Hospital, Harefield, Middlesex, UK
| | - Marco Masetti
- Heart Failure and Transplant Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | | | - Johan Nilsson
- Department of Cardiothoracic and Vascular Surgery, Skane University Hospital, Lund, Sweden
| | | | - Vivek Rao
- Division of Cardiac Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Katrine Rolid
- Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Kelly Schlendorf
- Division of Cardiology, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - Joseph Spinner
- Section of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA
| | - Madeleine Townsend
- Division of Pediatric Cardiology, Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Maxime Tremblay-Gravel
- Deparment of Medicine, Montreal Heart Institute, Université?de Montréal, Montreal, Quebec, Canada
| | - Simon Urschel
- Stollery Children's Hospital, University of Alberta, Edmonton, Alberta, Canada
| | - Jean-Luc Vachiery
- Department of Cardiology, Cliniques Universitaires de Bruxelles, Hôpital Académique Erasme, Bruxelles, Belgium
| | - Angela Velleca
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Georgina Waldman
- Department of Pharmacy, Massachusetts General Hospital, Boston, MA, USA
| | - James Walsh
- Allied Health Research Collaborative, The Prince Charles Hospital, Brisbane; Heart Lung Institute, The Prince Charles Hospital, Brisbane, Australia
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Stąpór M, Piłat A, Misiuda A, Górkiewicz-Kot I, Kaleta M, Kleczyński P, Żmudka K, Legutko J, Kapelak B, Wierzbicki K, Gackowski A. Preoperative and mid-term right ventricular systolic function assessment, at rest and during exercise, with speckle-tracking echocardiography after left ventricular assist device implantation. Hellenic J Cardiol 2024; 76:31-39. [PMID: 37295667 DOI: 10.1016/j.hjc.2023.05.011] [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] [Received: 01/22/2023] [Revised: 04/12/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
OBJECTIVES The study aimed to compare pre- and postoperative resting as well as postprocedural resting and exertional right ventricular speckle-tracking echocardiographic parameters at a mid-term follow-up after left ventricular assist device (LVAD) implantation. METHODS Patients with implanted third-generation LVADs with hydrodynamic bearings were prospectively enrolled (NCT05063006). Myocardial deformation was evaluated before pump implantation and at least three months after the procedure, both at rest and during exercise. RESULTS We included 22 patients, 7.3 months (IQR, 4.7-10.2) after the surgery. The mean age was 58.4 ± 7 years, 95.5% were men, and 45.5% had dilated cardiomyopathy. The RV strain analysis was feasible in all subjects both at rest and during exercise. The RV free wall strain (RVFWS) worsened from -13% (IQR, -17.3 to -10.9) to -11.3% (IQR, -12.9 to -6; p = 0.033) after LVAD implantation with a particular decline in the apical RV segment [-11.3% (IQR, -16.4 to -6.2) vs -7.8% (IQR, -11.7 to -3.9; p = 0.012)]. The RV four-chamber longitudinal strain (RV4CSL) remained unchanged [-8.5% (IQR, -10.8 to -6.9) vs -7.3% (IQR, -9.8 to -4.7; p = 0.184)]. Neither RVFWS (-11.3% (IQR, -12.9 to -6) vs -9.9% (IQR, -13.5 to -7.5; p = 0.077) nor RV4CSL [-7.3% (IQR, -9.8 to -4.7) vs -7.9% (IQR, -9.8 to -6.3; p = 0.548)] changed during the exercise test. CONCLUSIONS In patients who are pump-supported, the right ventricular free wall strain tends to worsen after LVAD implantation and remains unchanged during a cycle ergometer stress test.
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Affiliation(s)
- Maciej Stąpór
- Department of Interventional Cardiology, John Paul II Hospital, Kraków, Poland; Noninvasive Cardiovascular Laboratory, John Paul II Hospital, Kraków, Poland
| | - Adam Piłat
- AGH University of Science and Technology, Department of Automatic Control and Robotics, Kraków, Poland
| | - Agnieszka Misiuda
- Noninvasive Cardiovascular Laboratory, John Paul II Hospital, Kraków, Poland
| | - Izabela Górkiewicz-Kot
- Department of Cardiovascular Surgery and Transplantology, John Paul II Hospital, Kraków, Poland
| | - Michał Kaleta
- Department of Cardiovascular Surgery and Transplantology, John Paul II Hospital, Kraków, Poland
| | - Paweł Kleczyński
- Department of Interventional Cardiology, John Paul II Hospital, Kraków, Poland; Jagiellonian University Medical College, Faculty of Medicine, Institute of Cardiology, Department of Interventional Cardiology, John Paul II Hospital, Kraków, Poland
| | - Krzysztof Żmudka
- Department of Interventional Cardiology, John Paul II Hospital, Kraków, Poland; Jagiellonian University Medical College, Faculty of Medicine, Institute of Cardiology, Department of Interventional Cardiology, John Paul II Hospital, Kraków, Poland
| | - Jacek Legutko
- Department of Interventional Cardiology, John Paul II Hospital, Kraków, Poland; Jagiellonian University Medical College, Faculty of Medicine, Institute of Cardiology, Department of Interventional Cardiology, John Paul II Hospital, Kraków, Poland
| | - Bogusław Kapelak
- Department of Cardiovascular Surgery and Transplantology, John Paul II Hospital, Kraków, Poland; Jagiellonian University Medical College, Faculty of Medicine, Institute of Cardiology, Department of Cardiovascular Surgery and Transplantology, John Paul II Hospital, Kraków, Poland
| | - Karol Wierzbicki
- Department of Cardiovascular Surgery and Transplantology, John Paul II Hospital, Kraków, Poland; Jagiellonian University Medical College, Faculty of Medicine, Institute of Cardiology, Department of Cardiovascular Surgery and Transplantology, John Paul II Hospital, Kraków, Poland
| | - Andrzej Gackowski
- Noninvasive Cardiovascular Laboratory, John Paul II Hospital, Kraków, Poland; Department of Coronary Disease and Heart Failure, Faculty of Medicine, Institute of Cardiology, John Paul II Hospital, Jagiellonian University Medical College, Kraków, Poland.
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3
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Bounader K, Flécher E. End-stage heart failure: The future of heart transplant and artificial heart. Presse Med 2024; 53:104191. [PMID: 37898310 DOI: 10.1016/j.lpm.2023.104191] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 08/10/2023] [Accepted: 10/02/2023] [Indexed: 10/30/2023] Open
Abstract
In the last decades, outcomes significantly improved for both heart transplantation and LVAD. Heart transplantation remains the gold standard for the treatment of end stage heart failure and will remain for many years to come. The most relevant limitations are the lack of grafts and the effects of long-term immunosuppressive therapy that involve infectious, cancerous and metabolic complications despite advances in immunosuppression management. Mechanical circulatory support has an irreplaceable role in the treatment of end-staged heart failure, as bridge to transplant or as definitive implantation in non-transplant candidates. Although clinical results do not overcome those of HTx, improvement in the new generation of devices may help to reach the equipoise between the two therapies. This review will go through the evolution, current status and perspectives of both therapeutics.
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Affiliation(s)
- Karl Bounader
- Department of Cardiac Surgery, La Pitié Sâlpétrière Charles Foix Hospital, Paris, France
| | - Erwan Flécher
- Department of Vascular and Cardio-Thoracic Surgery, Rennes University Hospital, Rennes, France.
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Benedetto M, Piccone G, Nardozi L, Baca GL, Baiocchi M. Proportion of right ventricular failure and echocardiographic predictors in continuous-flow left ventricular assist device: a systematic review and meta-analysis. Indian J Thorac Cardiovasc Surg 2023; 39:170-181. [PMID: 37525703 PMCID: PMC10387004 DOI: 10.1007/s12055-022-01447-7] [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: 06/30/2022] [Revised: 11/13/2022] [Accepted: 11/17/2022] [Indexed: 01/13/2023] Open
Abstract
Background Right ventricular failure (RVF) in patients with a continuous-flow left ventricle assist device (CF-LVAD) is associated with higher incidence of mortality. This systematic review aims to assess the overall proportion of RVF and the pre-operative echocardiographic parameters which are best correlating to RVF. Methods A systematic research was conducted between 2008 and 2019 on MEDLINE, EMBASE, PUBMED, UPTODATE, OVID, COCHRANE LIBRARY, and Google Scholar electronic databases by performing a PRISMA flowchart. All observational studies regarding echocardiographic predictors of RVF in patients undergoing CF-LVAD implantation were included. Results A total number of 19 observational human studies published between 2008 and 2019 were included. We identified 524 RVF patients out of a pooled final population of 1741 patients. The RVF overall proportion was 28.25% with 95% confidence interval (CI) 0.24-0.34. The highest variability of perioperative echocardiographic parameters between the RVF and no right ventricular failure (NO-RVF) groups has been found with tricuspid annular plane systolic excursion (TAPSE), fractional area change (FAC), and right ventricular global longitudinal strain (RVGLS). Their standardized mean deviation (SMD) was - 0.33 (95% CI - 0.54 to - 0.11; p value 0.003), - 0.34 (95% CI - 0.53 to - 0.15; p value 0.0001), and 0.52 (95% CI 0.79 to 0.25; p value 0.0001), respectively. Conclusions The echocardiographic predictors of RVF after CF-LVAD placement are still uncertain. However, there seems to be a trend of statistical correlation between TAPSE, FAC, and RVGLS with RVF event after CF-LVAD placement. Supplementary Information The online version contains supplementary material available at 10.1007/s12055-022-01447-7.
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Affiliation(s)
- Maria Benedetto
- Anaesthesiology and Intensive Care, Cardiothoracic and Vascular Department, IRCSS Azienda Ospedaliero-Universitaria Di Bologna, Via Albertoni 15, Bologna, Italy
| | - Giulia Piccone
- Anaesthesiology and Intensive Care, Cardiothoracic and Vascular Department, IRCSS Azienda Ospedaliero-Universitaria Di Bologna, Via Albertoni 15, Bologna, Italy
| | - Ludovica Nardozi
- Anaesthesiology and Intensive Care, Cardiothoracic and Vascular Department, IRCSS Azienda Ospedaliero-Universitaria Di Bologna, Via Albertoni 15, Bologna, Italy
| | - Georgiana Luisa Baca
- Laboratory of Cardiovascular Science, National Institute On Aging, NIH, Baltimore, USA
| | - Massimo Baiocchi
- Anaesthesiology and Intensive Care, Cardiothoracic and Vascular Department, IRCSS Azienda Ospedaliero-Universitaria Di Bologna, Via Albertoni 15, Bologna, Italy
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Pienta MJ, Noly PE, Janda AM, Tang PC, Bitar A, Mathis MR, Aaronson KD, Pagani FD, Likosky DS. Rescuing the right ventricle: A conceptual framework to target new interventions for patients receiving a durable left ventricular assist device. J Thorac Cardiovasc Surg 2023; 165:2126-2131. [PMID: 35527048 PMCID: PMC11170340 DOI: 10.1016/j.jtcvs.2022.03.025] [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: 01/24/2022] [Revised: 03/14/2022] [Accepted: 03/22/2022] [Indexed: 11/23/2022]
Abstract
Despite significant advances in durable LVAD technology, right heart failure remains a morbid and fatal condition that is difficult to predict, prevent, and successfully treat.
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Affiliation(s)
- Michael J Pienta
- Section of Health Services Research and Quality, Department of Cardiac Surgery, Michigan Medicine, Ann Arbor, Mich
| | - Pierre-Emmanuel Noly
- Section of Health Services Research and Quality, Department of Cardiac Surgery, Michigan Medicine, Ann Arbor, Mich
| | - Allison M Janda
- Department of Anesthesiology, Michigan Medicine, Ann Arbor, Mich
| | - Paul C Tang
- Section of Health Services Research and Quality, Department of Cardiac Surgery, Michigan Medicine, Ann Arbor, Mich
| | - Abbas Bitar
- Division of Cardiovascular Medicine, Department of Internal Medicine, Michigan Medicine, Ann Arbor, Mich
| | - Michael R Mathis
- Department of Anesthesiology, Michigan Medicine, Ann Arbor, Mich
| | - Keith D Aaronson
- Division of Cardiovascular Medicine, Department of Internal Medicine, Michigan Medicine, Ann Arbor, Mich
| | - Francis D Pagani
- Section of Health Services Research and Quality, Department of Cardiac Surgery, Michigan Medicine, Ann Arbor, Mich
| | - Donald S Likosky
- Section of Health Services Research and Quality, Department of Cardiac Surgery, Michigan Medicine, Ann Arbor, Mich.
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Bonios MJ, Armenis I, Kogerakis N, Thodou A, Fragoulis S, Georgiadou P, Leontiadis E, Chamogeorgakis T, Drakos SG, Adamopoulos S. Prospective Phenotyping of Right Ventricle Function Following Intra-Aortic Balloon Pump Counterpulsation in Left Ventricular Assist Device Candidates: Outcomes and Predictors of Response. ASAIO J 2023; 69:e215-e222. [PMID: 37000672 DOI: 10.1097/mat.0000000000001927] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2023] Open
Abstract
Intra-aortic balloon pump (IABP) may be applied to optimize advanced heart failure (AHF) patients and improve right ventricular (RV) function before left ventricular assist device (LVAD) implantation. We aimed to evaluate the outcome of this intervention and define RV response predictors. Decompensated AHF patients, not eligible for LVAD because of poor RV function, who required IABP for stabilization were enrolled. Echocardiography and invasive hemodynamics were serially applied to determine fulfillment of prespecified "LVAD eligibility RV function" criteria (right atrium pressure [RA] <12 mm Hg, pulmonary artery pulsatility index [PAPi] >2.00, RA/pulmonary capillary wedge pressure [PCWP] <0.67, RV strain <-14.0%). Right ventricular-free wall tissue was harvested to assess interstitial fibrosis. Eighteen patients (12 male), aged 38 ± 14 years were supported with IABP for 55 ± 51 (3-180) days. In 11 (61.1%), RV improved and fulfilled the prespecified criteria, while seven (38.9%) showed no substantial improvement. Histopathology revealed an inverse correlation between RV interstitial fibrosis and functional benefit following IABP: interstitial fibrosis correlated with post-IABP RA ( r = 0.63, p = 0.037), RA/PCWP ( r = 0.87, p = 0.001), PAPi ( r = -0.83, p = 0.003). Conclusively, IABP improves RV function in certain AHF patients facilitating successful LVAD implantation. Right ventricular interstitial fibrosis quantification may be applied to predict response and guide preoperative patient selection and optimization. http://links.lww.com/ASAIO/A995.
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Affiliation(s)
- Michael J Bonios
- From the Heart Failure and Transplant Units, Onassis Cardiac Surgery Center, Athens, Greece
- Division of Cardiovascular Medicine and Nora Eccles Treadwell Cardiovascular Research and Training Institute, University of Utah School of Medicine, Salt Lake City, Utah
| | - Iakovos Armenis
- From the Heart Failure and Transplant Units, Onassis Cardiac Surgery Center, Athens, Greece
| | - Nektarios Kogerakis
- From the Heart Failure and Transplant Units, Onassis Cardiac Surgery Center, Athens, Greece
| | - Aspasia Thodou
- Division of Cardiovascular Medicine and Nora Eccles Treadwell Cardiovascular Research and Training Institute, University of Utah School of Medicine, Salt Lake City, Utah
| | - Socrates Fragoulis
- From the Heart Failure and Transplant Units, Onassis Cardiac Surgery Center, Athens, Greece
| | - Panagiota Georgiadou
- From the Heart Failure and Transplant Units, Onassis Cardiac Surgery Center, Athens, Greece
| | - Evangelos Leontiadis
- From the Heart Failure and Transplant Units, Onassis Cardiac Surgery Center, Athens, Greece
| | | | - Stavros G Drakos
- Division of Cardiovascular Medicine and Nora Eccles Treadwell Cardiovascular Research and Training Institute, University of Utah School of Medicine, Salt Lake City, Utah
| | - Stamatis Adamopoulos
- From the Heart Failure and Transplant Units, Onassis Cardiac Surgery Center, Athens, Greece
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7
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Scott A, Kligerman S, Hernandez DH, Kim P, Tran H, Pretorius V, Adler E, Contijoch F. Preoperative Computed Tomography Assessment of Risk of Right Ventricle Failure After Left Ventricular Assist Device Placement. ASAIO J 2023; 69:69-75. [PMID: 36583772 PMCID: PMC10684273 DOI: 10.1097/mat.0000000000001710] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Identification of patients who are at a high risk for right ventricular failure (RVF) after left ventricular assist device (LVAD) implantation is of critical importance. Conventional tools for predicting RVF, including two-dimensional echocardiography, right heart catheterization (RHC), and clinical parameters, generally have limited sensitivity and specificity. We retrospectively examined the ability of computed tomography (CT) ventricular volume measures to identify patients who experienced RVF after LVAD implantation. Between September 2017 and November 2021, 92 patients underwent LVAD surgery at our institution. Preoperative CT-derived ventricular volumes were obtained in 20 patients. Patients who underwent CT evaluation had a similar demographics and rate of RVF after LVAD as patients who did not undergo cardiac CT imaging. In the study cohort, seven of 20 (35%) patients experienced RVF (2 unplanned biventricular assist device, 5 prolonged inotropic support). Computed tomography-derived right ventricular end-diastolic and end-systolic volume indices were the strongest predictors of RVF compared with demographic, echocardiographic, and RHC data with areas under the receiver operating curve of 0.79 and 0.76, respectively. Computed tomography volumetric assessment of RV size can be performed in patients evaluated for LVAD treatment. RV measures of size provide a promising means of pre-LVAD assessment for postoperative RV failure.
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Affiliation(s)
- Anderson Scott
- Department of Bioengineering, UC San Diego, 9500 Gilman Drive, La Jolla CA, United States
| | - Seth Kligerman
- Department of Radiology, UC San Diego, 9500 Gilman Drive, La Jolla CA, United States
| | | | - Paul Kim
- Department of Medicine, UC San Diego, 9500 Gilman Drive, La Jolla CA, United States
| | - Hao Tran
- Department of Medicine, UC San Diego, 9500 Gilman Drive, La Jolla CA, United States
| | - Victor Pretorius
- Department of Surgery, UC San Diego, 9500 Gilman Drive, La Jolla CA, United States
| | - Eric Adler
- Department of Medicine, UC San Diego, 9500 Gilman Drive, La Jolla CA, United States
| | - Francisco Contijoch
- Department of Bioengineering, UC San Diego, 9500 Gilman Drive, La Jolla CA, United States
- Department of Radiology, UC San Diego, 9500 Gilman Drive, La Jolla CA, United States
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Nicoara A, Wright MC, Rosenkrans D, Patel CB, Schroder JN, Cherry AD, Hashmi NK, Pollak AL, McCartney SL, Katz J, Milano CA, Podgoreanu MV. Predictive capabilities of the European Registry for Patients with Mechanical Circulatory Support Right-Sided Heart Failure risk score after left ventricular assist device implantation. J Cardiothorac Vasc Anesth 2022; 36:3740-3746. [DOI: 10.1053/j.jvca.2022.06.022] [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: 04/13/2022] [Revised: 06/09/2022] [Accepted: 06/17/2022] [Indexed: 11/11/2022]
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(Physiology of Continuous-flow Left Ventricular Assist Device Therapy. Translation of the document prepared by the Czech Society of Cardiology). COR ET VASA 2022. [DOI: 10.33678/cor.2022.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Essandoh M, Kumar N, Hussain N, Dalia AA, Wang D, Al-Qudsi O, Wilsak D, Stahl D, Bhatt A, Sawyer TR, Iyer MH. Pulmonary Artery Pulsatility Index as a Predictor of Right Ventricular Failure in Left Ventricular Assist Device Recipients: A Systematic Review. J Heart Lung Transplant 2022; 41:1114-1123. [DOI: 10.1016/j.healun.2022.04.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 04/16/2022] [Accepted: 04/19/2022] [Indexed: 12/25/2022] Open
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Kislitsina ON, D Rich J, Wilcox JE, E Vorovich E, Wu T, Churyla A, S Harap R, Andrei AC, McCarthy PM, Yancy CW, Pham DT. Propensity Score-Matched Comparison of Right Ventricular Strain in Women and Men Before and After Left Ventricular Assist Device Implantation. INNOVATIONS-TECHNOLOGY AND TECHNIQUES IN CARDIOTHORACIC AND VASCULAR SURGERY 2022; 17:102-110. [PMID: 35275496 DOI: 10.1177/15569845221081937] [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: 11/16/2022]
Abstract
Objective: Adverse events following left ventricular assist device (LVAD) implantation are more common in women than in men, but the impact of gender differences on right ventricular (RV) failure is not well defined. Therefore, we calculated RV strain before and after LVAD implantation in matched groups of men and women to determine if gender differences in RV failure after LVAD might account for the gender differences in overall outcomes. Methods: RV free wall longitudinal strain (FWS) and fractional area change were calculated preoperatively and 3 months postoperatively using speckle-tracking echocardiography analysis. A total of 172 patients (86 women, 86 men) were then propensity score matched (1:1) for comparison. Results: Although women had higher preoperative CHA2DS2-VASc scores and more frequent moderate mitral regurgitation than men (P = 0.018), the preoperative hemodynamic parameters were similar. Preoperative RV-FWS was -6.7% in women and -6.0% in men (P = 0.65). Postoperatively, women had more progression to severe tricuspid regurgitation (TR) than men (15% vs 7%, P = 0.06). At 3 months the RV-FWS was -7.7% in women and -7.0% in men (P = 0.59). Postoperative TR was moderate-severe in 20% of women and in 9% of men (P = 0.001). Women had a higher incidence of venous thromboembolism, cardiac arrhythmias, and bleeding compared with men. Women also had higher mortality rates at discharge and 30 days after surgery, but the survival rates at 5 years were similar. Conclusions: RV strain measurements track standard hemodynamic and echocardiographic parameters and confirm that gender differences in outcomes following LVAD implantation are not related to gender differences in RV failure rates.
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Affiliation(s)
- Olga N Kislitsina
- Division of Cardiology, Feinberg School of Medicine, 12244Northwestern University, Chicago, IL, USA.,Division of Cardiac Surgery, Feinberg School of Medicine, 3270Northwestern University, Chicago, IL, USA
| | - Jonathan D Rich
- Division of Cardiology, Feinberg School of Medicine, 12244Northwestern University, Chicago, IL, USA
| | - Jane E Wilcox
- Division of Cardiology, Feinberg School of Medicine, 12244Northwestern University, Chicago, IL, USA
| | - Esther E Vorovich
- Division of Cardiology, Feinberg School of Medicine, 12244Northwestern University, Chicago, IL, USA
| | - Tingqing Wu
- Division of Cardiology, Feinberg School of Medicine, 12244Northwestern University, Chicago, IL, USA
| | - Andrei Churyla
- Division of Cardiac Surgery, Feinberg School of Medicine, 3270Northwestern University, Chicago, IL, USA
| | - Rebecca S Harap
- Division of Cardiology, Feinberg School of Medicine, 12244Northwestern University, Chicago, IL, USA
| | - Adin-Christian Andrei
- Division of Cardiac Surgery, Feinberg School of Medicine, 3270Northwestern University, Chicago, IL, USA
| | - Patrick M McCarthy
- Division of Cardiac Surgery, Feinberg School of Medicine, 3270Northwestern University, Chicago, IL, USA
| | - Clyde W Yancy
- Division of Cardiology, Feinberg School of Medicine, 12244Northwestern University, Chicago, IL, USA
| | - Duc Thin Pham
- Division of Cardiac Surgery, Feinberg School of Medicine, 3270Northwestern University, Chicago, IL, USA
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12
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Rosenbaum AN, Antaki JF, Behfar A, Villavicencio MA, Stulak J, Kushwaha SS. Physiology of Continuous-Flow Left Ventricular Assist Device Therapy. Compr Physiol 2021; 12:2731-2767. [PMID: 34964115 DOI: 10.1002/cphy.c210016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The expanding use of continuous-flow left ventricular assist devices (CF-LVADs) for end-stage heart failure warrants familiarity with the physiologic interaction of the device with the native circulation. Contemporary devices utilize predominantly centrifugal flow and, to a lesser extent, axial flow rotors that vary with respect to their intrinsic flow characteristics. Flow can be manipulated with adjustments to preload and afterload as in the native heart, and ascertainment of the predicted effects is provided by differential pressure-flow (H-Q) curves or loops. Valvular heart disease, especially aortic regurgitation, may significantly affect adequacy of mechanical support. In contrast, atrioventricular and ventriculoventricular timing is of less certain significance. Although beneficial effects of device therapy are typically seen due to enhanced distal perfusion, unloading of the left ventricle and atrium, and amelioration of secondary pulmonary hypertension, negative effects of CF-LVAD therapy on right ventricular filling and function, through right-sided loading and septal interaction, can make optimization challenging. Additionally, a lack of pulsatile energy provided by CF-LVAD therapy has physiologic consequences for end-organ function and may be responsible for a series of adverse effects. Rheological effects of intravascular pumps, especially shear stress exposure, result in platelet activation and hemolysis, which may result in both thrombotic and hemorrhagic consequences. Development of novel solutions for untoward device-circulatory interactions will facilitate hemodynamic support while mitigating adverse events. © 2021 American Physiological Society. Compr Physiol 12:1-37, 2021.
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Affiliation(s)
- Andrew N Rosenbaum
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA.,William J von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, Minnesota, USA
| | - James F Antaki
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York, USA
| | - Atta Behfar
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA.,William J von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, Minnesota, USA.,VanCleve Cardiac Regenerative Medicine Program, Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | | | - John Stulak
- Department of Cardiovascular Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Sudhir S Kushwaha
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA.,William J von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, Minnesota, USA
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13
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Pergola V, Previtero M, Lorenzoni G, Ocagli H, Simeti G, Aruta P, Baritussio A, Cecchetto A, Leoni L, Mancuso D, Gregori D, Salvo GD, Iliceto S, Mele D. Feasibility and Role of Right Ventricular Stress Echocardiography in Adult Patients. J Cardiovasc Echogr 2021; 31:68-72. [PMID: 34485031 PMCID: PMC8388328 DOI: 10.4103/jcecho.jcecho_4_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/06/2021] [Indexed: 12/02/2022] Open
Abstract
Background: The great technological advancements in the field of echocardiography have led to applications of stress echocardiography (SE) in almost all diagnostic fields of cardiology, from ischemic heart disease to valvular heart disease and diastolic function. However, the assessment of the right ventricle (RV) in general, and in particular in regard to the contractile reserve of the RV, is an area that has not been previously explored. We, therefore, propose a study to investigate the potential use of SE for the assessment of RV function in adult patients. Aims and objectives: The primary aim is to evaluate the feasibility of right ventricular SE. The secondary aim is to assess right ventricular contractile reserve. Matherials and Methods: Eighty-one patients undergoing a physical or dobutamine stress echocardiogram for cardiovascular risk stratification or chest pain were the subject of the study. An exercise leg cycle using a standard WHO protocol was used to simultaneously assess the right and left ventricular global and regional function as well as acquiring Doppler data. Whereas the patient had limitations in mobility, a dobutamine SE was be performed. We evaluated the average values of tricuspid annular plane systolic excursion (TAPSE), fractional area change (FAC), S-wave, systolic pulmonary artery pressure (sPAP), and right ventricle global longitudinal (free wall) strain (RVGLS) during baseline and at the peak of the effort. RV contractile reserve was defined as the change in RVGLS from rest to peak exercise. We also assessed the reproducibility of these measurements between two different expert operators (blind analysis). Results: At least 3 over 5 RV function parameters were measurable both during baseline and at the peak of the effort in 95% of patients, while all 5 parameters in 65% of our population, demonstrating an excellent feasibility. All RV-studied variables showed a statistically significant increase (P < 0.001) at peak compared to the baseline. The average percentage increases at peak were 31.1% for TAPSE, 24.8% for FAC, 50.6% for S-wave, 55.2% for PAPS, and 39.8% for RV strain. The reproducibility between operators at baseline and peak was excellent. Our study demonstrates that TAPSE, FAC, and S-wave are highly feasible at rest and at peak, while TAPSE, S-wave, and sPAP are the most reliable measurements during RV stress echo. Conclusion: RVGLS is useful in the assessment of RV contractile reserve in patients with good acoustic window. Further studies are needed to evaluate the impact of contrast echocardiography in improving RV contractile reserve assessment during SE.
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Affiliation(s)
- Valeria Pergola
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Marco Previtero
- Department of Cardiac, Thoracic, Vascular Sciences, and Public Health, Unit of Biostatistics, Epidemiology and Public Health, University of Padova, Padova, Italy
| | - Giulia Lorenzoni
- Department of Cardiac, Thoracic, Vascular Sciences, and Public Health, Unit of Biostatistics, Epidemiology and Public Health, University of Padova, Padova, Italy
| | - Honoria Ocagli
- Department of Cardiac, Thoracic, Vascular Sciences, and Public Health, Unit of Biostatistics, Epidemiology and Public Health, University of Padova, Padova, Italy
| | - Giuseppe Simeti
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Patrizia Aruta
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Anna Baritussio
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Antonella Cecchetto
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Loira Leoni
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Daniela Mancuso
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Dario Gregori
- Department of Cardiac, Thoracic, Vascular Sciences, and Public Health, Unit of Biostatistics, Epidemiology and Public Health, University of Padova, Padova, Italy
| | - Giovanni Di Salvo
- Department of Women Children Health, University of Padova, Padova, Italy
| | - Sabino Iliceto
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Donato Mele
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padova, Padova, Italy
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14
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Kittipibul V, Blumer V, Hernandez GA, Fudim M, Flowers R, Chaparro S, Agarwal R. Pre-operative atrial fibrillation and early right ventricular failure after left ventricular assist device implantation: a systematic review and meta-analysis. Am Heart J 2021; 239:120-128. [PMID: 34038705 DOI: 10.1016/j.ahj.2021.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 05/14/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Right ventricular failure (RVF) remains a major cause of morbidity and mortality after left ventricular assist device (LVAD). Atrial fibrillation (AF) is known for its deleterious effects on cardiac function and hemodynamics. The association of pre-operative AF with the risk of early post-LVAD RVF has not been well described. METHOD A comprehensive literature search was performed through April, 9 2021. Cohort studies comparing the risk of post-operative RVF and/or need for right ventricular assist device (RVAD) after LVAD in patients with or without AF were included. Pooled odds ratio (OR) with 95% confidence intervals (CI) and I2 statistic were calculated using the random-effects model. RESULTS Six studies were included in the analysis. Post-operative RVF was reported in 5 studies (1,841 patients) and RVAD use was reported in 4 studies (1,355 patients). There is a non-significant trend toward a higher risk of post-operative RVF in the AF group (pooled OR=1.25, 95%CI=0.99-1.58). No significant association between AF and RVAD use is noted (pooled OR=1.17, 95%CI=0.82-1.66). CONCLUSIONS Pre-operative AF is not significantly associated with higher risks of post-operative RVF and RVAD use after LVAD implantation, although the trend toward higher post-operative RVF is observed in patients with pre-operative AF. Additional research using a larger study population is warranted to better understand the association of pre-operative AF and the development of post-LVAD RVF.
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Key Words
- BTT, Bridge to transplant
- CI, Cardiac index
- CVP, Central venous pressure
- DT, Destination therapy
- HF, Heart failure
- LV, Left ventricle
- LVAD, Left ventricular assist device
- None, ABBREVIATIONS: AF, Atrial fibrillation
- PAP, Pulmonary artery pressure
- RV, Right ventricle
- RVAD, Right ventricular assist device
- RVF, Right ventricular failure
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15
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Shad R, Quach N, Fong R, Kasinpila P, Bowles C, Castro M, Guha A, Suarez EE, Jovinge S, Lee S, Boeve T, Amsallem M, Tang X, Haddad F, Shudo Y, Woo YJ, Teuteberg J, Cunningham JP, Langlotz CP, Hiesinger W. Predicting post-operative right ventricular failure using video-based deep learning. Nat Commun 2021; 12:5192. [PMID: 34465780 PMCID: PMC8408163 DOI: 10.1038/s41467-021-25503-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 08/11/2021] [Indexed: 11/22/2022] Open
Abstract
Despite progressive improvements over the decades, the rich temporally resolved data in an echocardiogram remain underutilized. Human assessments reduce the complex patterns of cardiac wall motion, to a small list of measurements of heart function. All modern echocardiography artificial intelligence (AI) systems are similarly limited by design - automating measurements of the same reductionist metrics rather than utilizing the embedded wealth of data. This underutilization is most evident where clinical decision making is guided by subjective assessments of disease acuity. Predicting the likelihood of developing post-operative right ventricular failure (RV failure) in the setting of mechanical circulatory support is one such example. Here we describe a video AI system trained to predict post-operative RV failure using the full spatiotemporal density of information in pre-operative echocardiography. We achieve an AUC of 0.729, and show that this ML system significantly outperforms a team of human experts at the same task on independent evaluation.
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Affiliation(s)
- Rohan Shad
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA
| | - Nicolas Quach
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA
| | - Robyn Fong
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA
| | - Patpilai Kasinpila
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA
| | - Cayley Bowles
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA
| | - Miguel Castro
- Department of Cardiovascular Medicine, Houston Methodist DeBakey Heart Centre, Houston, TX, USA
| | - Ashrith Guha
- Department of Cardiovascular Medicine, Houston Methodist DeBakey Heart Centre, Houston, TX, USA
| | - Erik E Suarez
- Department of Cardiothoracic Surgery, Houston Methodist DeBakey Heart Centre, Houston, TX, USA
| | - Stefan Jovinge
- Department of Cardiovascular Surgery, Spectrum Health Grand Rapids, Grand Rapids, MI, USA
| | - Sangjin Lee
- Department of Cardiovascular Surgery, Spectrum Health Grand Rapids, Grand Rapids, MI, USA
| | - Theodore Boeve
- Department of Cardiovascular Surgery, Spectrum Health Grand Rapids, Grand Rapids, MI, USA
| | - Myriam Amsallem
- Department of Cardiovascular Medicine, Stanford University, Stanford, CA, USA
| | - Xiu Tang
- Department of Cardiovascular Medicine, Stanford University, Stanford, CA, USA
| | - Francois Haddad
- Department of Cardiovascular Medicine, Stanford University, Stanford, CA, USA
| | - Yasuhiro Shudo
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA
| | - Y Joseph Woo
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA
| | - Jeffrey Teuteberg
- Department of Cardiovascular Medicine, Stanford University, Stanford, CA, USA
- Stanford Artificial Intelligence in Medicine Centre, Stanford, CA, USA
| | | | - Curtis P Langlotz
- Stanford Artificial Intelligence in Medicine Centre, Stanford, CA, USA
- Department of Radiology and Biomedical Informatics, Stanford University, Stanford, CA, USA
| | - William Hiesinger
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA.
- Stanford Artificial Intelligence in Medicine Centre, Stanford, CA, USA.
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16
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Shah H, Murray T, Schultz J, John R, Martin CM, Thenappan T, Cogswell R. External assessment of the EUROMACS right-sided heart failure risk score. Sci Rep 2021; 11:16064. [PMID: 34373475 PMCID: PMC8352910 DOI: 10.1038/s41598-021-94792-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 07/01/2021] [Indexed: 11/15/2022] Open
Abstract
The EUROMACS Right-Sided Heart Failure Risk Score was developed to predict right ventricular failure (RVF) after left ventricular assist device (LVAD) placement. The predictive ability of the EUROMACS score has not been tested in other cohorts. We performed a single center analysis of a continuous-flow (CF) LVAD cohort (n = 254) where we calculated EUROMACS risk scores and assessed for right ventricular heart failure after LVAD implantation. Thirty-nine percent of patients (100/254) had post-operative RVF, of which 9% (23/254) required prolonged inotropic support and 5% (12/254) required RVAD placement. For patients who developed RVF after LVAD implantation, there was a 45% increase in the hazards of death on LVAD support (HR 1.45, 95% CI 0.98–2.2, p = 0.066). Two variables in the EUROMACS score (Hemoglobin and Right Atrial Pressure to Pulmonary Capillary Wedge Pressure ratio) were not predictive of RVF in our cohort. Overall, the EUROMACS score had poor external discrimination in our cohort with area under the curve of 58% (95% CI 52–66%). Further work is necessary to enhance our ability to predict RVF after LVAD implantation.
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Affiliation(s)
- Hirak Shah
- Department of Medicine, Division of Cardiology, University of Minnesota, 401 East River Parkway, Variety Club Research Center (VCRC), 1st Floor - Suite 131, Minneapolis, MN, 55455, USA
| | - Thomas Murray
- Division of Biostatistics, University of Minnesota, Minneapolis, MN, USA
| | - Jessica Schultz
- Department of Medicine, Division of Cardiology, University of Minnesota, 401 East River Parkway, Variety Club Research Center (VCRC), 1st Floor - Suite 131, Minneapolis, MN, 55455, USA
| | - Ranjit John
- Department of Cardiothoracic Surgery, Division of Surgery, University of Minnesota, Minneapolis, MN, USA
| | - Cindy M Martin
- Department of Medicine, Division of Cardiology, University of Minnesota, 401 East River Parkway, Variety Club Research Center (VCRC), 1st Floor - Suite 131, Minneapolis, MN, 55455, USA
| | - Thenappan Thenappan
- Department of Medicine, Division of Cardiology, University of Minnesota, 401 East River Parkway, Variety Club Research Center (VCRC), 1st Floor - Suite 131, Minneapolis, MN, 55455, USA
| | - Rebecca Cogswell
- Department of Medicine, Division of Cardiology, University of Minnesota, 401 East River Parkway, Variety Club Research Center (VCRC), 1st Floor - Suite 131, Minneapolis, MN, 55455, USA.
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17
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Rivas-Lasarte M, Kumar S, Derbala MH, Ferrall J, Cefalu M, Rashid SMI, Joseph DT, Goldstein DJ, Jorde UP, Guha A, Bhimaraj A, Suarez EE, Smith SA, Sims DB. Prediction of right heart failure after left ventricular assist implantation: external validation of the EUROMACS right-sided heart failure risk score. EUROPEAN HEART JOURNAL-ACUTE CARDIOVASCULAR CARE 2021; 10:723-732. [PMID: 34050652 DOI: 10.1093/ehjacc/zuab029] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 03/21/2021] [Indexed: 11/13/2022]
Abstract
AIMS Prediction of right heart failure (RHF) after left ventricular assist device (LVAD) implant remains a challenge. The EUROMACS right-sided heart failure (EUROMACS-RHF) risk score was proposed as a prediction tool for post-LVAD RHF but lacks from large external validation. The aim of our study was to externally validate the score. METHODS AND RESULTS From January 2007 to December 2017, 878 continuous-flow LVADs were implanted at three tertiary centres. We calculated the EUROMACS-RHF score in 662 patients with complete data. We evaluated its predictive performance for early RHF defined as either (i) need for short- or long-term right-sided circulatory support, (ii) continuous inotropic support for ≥14 days, or (iii) nitric oxide for ≥48 h post-operatively. Right heart failure occurred in 211 patients (32%). When compared with non-RHF patients, pre-operatively they had higher creatinine, bilirubin, right atrial pressure, and lower INTERMACS class (P < 0.05); length of stay and in-hospital mortality were higher. Area under the ROC curve for RHF prediction of the EUROMACS-RHF score was 0.64 [95% confidence interval (CI) 0.60-0.68]. Reclassification of patients with RHF was significantly better when applying the EUROMACS-RHF risk score on top of previous published scores. Patients in the high-risk category had significantly higher in-hospital and 2-year mortality [hazard ratio: 1.64 (95% CI 1.16-2.32) P = 0.005]. CONCLUSION In an external cohort, the EUROMACS-RHF had limited discrimination predicting RHF. The clinical utility of this score remains to be determined.
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Affiliation(s)
- Mercedes Rivas-Lasarte
- Division of Cardiology, Department of Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, 3400 Bainbridge Avenue, Bronx, NY 10467, USA.,Advanced Heart Failure and Transplant Unit, Hospital Universitario Puerta de Hierro Majadahonda, CIBERCV, Majadahonda, Madrid, Spain
| | - Salil Kumar
- Division of Cardiology, Department of Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, 3400 Bainbridge Avenue, Bronx, NY 10467, USA.,Houston Methodist DeBakey Heart and Vascular Center, Houston Methodist Hospital, Houston, TX, USA
| | - Mohamed H Derbala
- Department of Cardiovascular Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Joel Ferrall
- Department of Cardiovascular Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Matthew Cefalu
- Department of Cardiovascular Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Syed Muhammad Ibrahim Rashid
- Division of Cardiology, Department of Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, 3400 Bainbridge Avenue, Bronx, NY 10467, USA
| | - Denny T Joseph
- Department of Internal Medicine, Houston Methodist Hospital, Houston, TX, USA
| | - Daniel J Goldstein
- Department of Cardiothoracic and Vascular Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Ulrich P Jorde
- Division of Cardiology, Department of Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, 3400 Bainbridge Avenue, Bronx, NY 10467, USA
| | - Ashrith Guha
- Houston Methodist DeBakey Heart and Vascular Center, Houston Methodist Hospital, Houston, TX, USA
| | - Arvind Bhimaraj
- Houston Methodist DeBakey Heart and Vascular Center, Houston Methodist Hospital, Houston, TX, USA
| | - Erik E Suarez
- Houston Methodist DeBakey Heart and Vascular Center, Houston Methodist Hospital, Houston, TX, USA
| | - Sakima A Smith
- Department of Cardiovascular Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Daniel B Sims
- Division of Cardiology, Department of Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, 3400 Bainbridge Avenue, Bronx, NY 10467, USA
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18
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Ventricular systolic dysfunction with and without altered myocardial contractility: Clinical value of echocardiography for diagnosis and therapeutic decision-making. Int J Cardiol 2020; 327:236-250. [PMID: 33285193 DOI: 10.1016/j.ijcard.2020.11.068] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 02/06/2023]
Abstract
The inability of one of the two or both ventricles to contract normally and expel sufficient blood to meet the functional demands of the body results from a complex interplay between intrinsic abnormalities and extracardiac factors that limit ventricular pump function and is a major cause for heart failure (HF). Even if impaired myocardial contractile function was the primary cause for ventricular dysfunction, with the progression of systolic dysfunction, additionally developed diastolic dysfunction can also contribute to the severity of HF. Although at the first sight, the diagnosis of systolic HF appears quite easy because it is usually defined by reduction of the ejection fraction (EF), in reality this issue is far more complex because ventricular pumping performance depends not only on myocardial contractility, but also largely on loading conditions (preload and afterload), being also influenced by valvular function, ventricular interdependence, pericardial constraint, synchrony of ventricular contrac-tion and heart rhythm. Conventional echocardiography (ECHO) combined with new imaging techniques such as tissue Doppler and tissue tracking can detect early subclinical alteration of ventricular systolic function. However, no single ECHO parameter reveals alone the whole picture of systolic dysfunction. Multiparametric ECHO evaluation and the use of integrative approaches using ECHO-parameter combinations which include also the ventricular loading conditions appeared particularly useful especially for differentiation between primary (myocardial damage-induced) and secondary (hemodynamic overload-induced) systolic dysfunction. This review summarizes the available evidence on the usefulness and limitations of comprehensive evaluation of LV and RV systolic function by using all the currently available ECHO techniques.
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19
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Barssoum K, Altibi AM, Rai D, Kharsa A, Kumar A, Chowdhury M, Elkaryoni A, Abuzaid AS, Baibhav B, Parikh V, Masri A, Amsallem M, Nanda NC. Assessment of right ventricular function following left ventricular assist device (LVAD) implantation-The role of speckle-tracking echocardiography: A meta-analysis. Echocardiography 2020; 37:2048-2060. [PMID: 33084128 DOI: 10.1111/echo.14884] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/03/2020] [Accepted: 09/20/2020] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Right ventricular failure (RVF) following left ventricular assist device (LVAD) implantation is associated with worse outcomes. Prediction of RVF is difficult with routine transthoracic echocardiography (TTE), while speckle-tracking echocardiography (STE) showed promising results. We performed systematic review and meta-analysis of published literature. METHODS We queried multiple databases to compile articles reporting preoperative or intraoperative right ventricle global longitudinal strain (RVGLS) or right ventricle free wall strain (RVFWS) in LVAD recipients. The standard mean difference (SMD) in RVGLS and RVFWS in patients with and without RVF postoperatively was pooled using random-effects model. RESULTS Seventeen studies were included. Patients with RVF had significantly lower RVGLS and RVFWS as compared to non-RVF patients; SMD: 2.79 (95% CI: -4.07 to -1.50; P: <.001) and -3.05 (95% CI: -4.11 to -1.99; P: <.001), respectively. The pooled odds ratio (OR) for RVF per percentage increase of RVGLS and RVFWS were 1.10 (95 CI: 0.98-1.25) and 1.63 (95% CI 1.07-2.47), respectively. In a subgroup analysis, TTE-derived GLS and FWS were significantly lower in RVF patients as compared to non-RVF patients; SMD of -3.97 (95% CI: -5.40 to -2.54; P: <.001) and -3.05 (95% CI: -4.11 to -1.99; P: <.001), respectively. There was no significant difference between RVF and non-RVF groups in TEE-derived RVGLS and RVFWS. CONCLUSION RVGLS and RVFWS were lower in patients who developed RVF as compared to non-RVF patients. In a subgroup analysis, TTE-derived RVGLS and RVFWS were reduced in RVF patients as compared to non-RVF patients. This difference was not reported with TEE.
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Affiliation(s)
- Kirolos Barssoum
- Department of Internal Medicine, Unity Hospital, Rochester Regional Health System, Rochester, NY, USA
| | - Ahmed M Altibi
- Department of Internal Medicine, Henry Ford Allegiance Health, Jackson, MI, USA
| | - Devesh Rai
- Department of Internal Medicine, Rochester General Hospital, Rochester, NY, USA
| | - Adnan Kharsa
- Department of Internal Medicine, Rochester General Hospital, Rochester, NY, USA
| | - Ashish Kumar
- Department of Critical Care, St. John's Medical College, Bangalore, India
| | - Medhat Chowdhury
- Department of Internal Medicine, Rochester General Hospital, Rochester, NY, USA
| | - Ahmed Elkaryoni
- Department of Cardiovascular Medicine, Loyola University Medical Center, Maywood, IL, USA
| | - Ahmed Sami Abuzaid
- Department of Cardiology, Alaska and Vascular Institute LLC, Anchorage, AL, USA
| | - Bipul Baibhav
- Department of Cardiology, Sands Constellation Heart Institute, Rochester Regional Health, Rochester, NY, USA
| | - Vishal Parikh
- Department of Advanced Heart Failure and Transplant, Sands Constellation Heart Institute, Rochester Regional Health, Rochester, NY, USA
| | - Ahmad Masri
- Department of Cardiology, Oregon Health and Science University, Portland, Oregon, USA
| | - Myriam Amsallem
- Department of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Navin C Nanda
- Division of Cardiovascular Disease, University of Alabama, Birmingham, AL, USA
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20
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Frankfurter C, Molinero M, Vishram-Nielsen JK, Foroutan F, Mak S, Rao V, Billia F, Orchanian-Cheff A, Alba AC. Predicting the Risk of Right Ventricular Failure in Patients Undergoing Left Ventricular Assist Device Implantation. Circ Heart Fail 2020; 13:e006994. [DOI: 10.1161/circheartfailure.120.006994] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Background:
Right ventricular failure (RVF) is a cause of major morbidity and mortality after left ventricular assist device (LVAD) implantation. It is, therefore, integral to identify patients who may benefit from biventricular support early post-LVAD implantation. Our objective was to explore the performance of risk prediction models for RVF in adult patients undergoing LVAD implantation.
Methods:
A systematic search was performed on Medline, Embase, Cochrane Central Register of Controlled Trials, and Cochrane Database of Systematic Reviews from inception until August 2019 for all relevant studies. Performance was assessed by discrimination (via C statistic) and calibration if reported. Study quality was assessed using the Prediction Model Risk of Bias Assessment Tool criteria.
Results:
After reviewing 3878 citations, 25 studies were included, featuring 20 distinctly derived models. Five models were derived from large multicenter cohorts: the European Registry for Patients With Mechanical Circulatory Support, Interagency Registry for Mechanically Assisted Circulatory Support, Kormos, Pittsburgh Bayesian, and Mechanical Circulatory Support Research Network RVF models. Seventeen studies (68%) were conducted in cohorts implanted with continuous-flow LVADs exclusively. The definition of RVF as an outcome was heterogenous among models. Seven derived models (28%) were validated in at least 2 cohorts, reporting limited discrimination (C-statistic range, 0.53–0.65). Calibration was reported in only 3 studies and was variable.
Conclusions:
Existing RVF prediction models exhibit heterogeneous derivation and validation methodologies, varying definitions of RVF, and are mostly derived from single centers. Validation studies of these prediction models demonstrate poor-to-modest discrimination. Newer models are derived in cohorts implanted with continuous-flow LVADs exclusively and exhibit modest discrimination. Derivation of enhanced discriminatory models and their validations in multicenter cohorts is needed.
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Affiliation(s)
| | - Micaela Molinero
- Heart Failure and Transplant Program, Peter Munk Cardiac Centre (M.M., J.K.K.V.-N., F.F., F.B., A.C.A.), University Health Network, Toronto, Canada
| | - Julie K.K. Vishram-Nielsen
- Heart Failure and Transplant Program, Peter Munk Cardiac Centre (M.M., J.K.K.V.-N., F.F., F.B., A.C.A.), University Health Network, Toronto, Canada
- Department of Cardiology, Rigshospitalet, University Hospital of Copenhagen, Denmark (J.K.K.V.-N.)
| | - Farid Foroutan
- Heart Failure and Transplant Program, Peter Munk Cardiac Centre (M.M., J.K.K.V.-N., F.F., F.B., A.C.A.), University Health Network, Toronto, Canada
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada (F.F., A.C.A.)
| | - Susanna Mak
- Division of Cardiology, Mount Sinai Hospital, Sinai Health System, Toronto, Canada (S.M.)
| | - Vivek Rao
- Division of Cardiovascular Surgery, Peter Munk Cardiac Centre (V.R.), University Health Network, Toronto, Canada
| | - Filio Billia
- Department of Medicine, University of Toronto, Canada (C.F., F.B.)
- Heart Failure and Transplant Program, Peter Munk Cardiac Centre (M.M., J.K.K.V.-N., F.F., F.B., A.C.A.), University Health Network, Toronto, Canada
| | - Ani Orchanian-Cheff
- Library and Information Services (A.O.-C.), University Health Network, Toronto, Canada
| | - Ana Carolina Alba
- Heart Failure and Transplant Program, Peter Munk Cardiac Centre (M.M., J.K.K.V.-N., F.F., F.B., A.C.A.), University Health Network, Toronto, Canada
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada (F.F., A.C.A.)
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21
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Dandel M, Javier MFDM, Javier Delmo EMD, Hetzer R. Accurate assessment of right heart function before and after long-term left ventricular assist device implantation. Expert Rev Cardiovasc Ther 2020; 18:289-308. [DOI: 10.1080/14779072.2020.1761790] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Michael Dandel
- Department of Cardiology, Cardio Centrum Berlin, Berlin, Germany
| | | | | | - Roland Hetzer
- Department of Cardiothoracic and Vascular Surgery, Cardio Centrum Berlin, Berlin, Germany
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22
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Pastore MC, De Carli G, Mandoli GE, D'Ascenzi F, Focardi M, Contorni F, Mondillo S, Cameli M. The prognostic role of speckle tracking echocardiography in clinical practice: evidence and reference values from the literature. Heart Fail Rev 2020; 26:1371-1381. [PMID: 32219615 DOI: 10.1007/s10741-020-09945-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Speckle tracking echocardiography (STE) is a second-level echocardiographic technique which has gradually gained relevance in the last years. It allows semi-automatic quantification of myocardial deformation and function, overcoming most of the limitations characterizing basic echocardiography and providing an early detection of cardiac impairment. Today, its feasibility and usefulness are highly supported by literature. In particular, several studies demonstrated that STE could provide additional prognostic information beyond conventional echocardiographic and traditional clinical parameters. Moreover, a recent standardization of speckle tracking analysis regarding all cardiac chambers paved the way for the integration of STE in diagnostic and prognostic protocols for particular clinical settings. The aim of this review is to describe the prognostic role of STE in different clinical scenarios basing on currently available evidence.
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Affiliation(s)
- Maria Concetta Pastore
- Department of Cardiovascular Diseases, University of Siena, Viale Bracci 1, Siena, Italy.
| | - Giuseppe De Carli
- Department of Cardiovascular Diseases, University of Siena, Viale Bracci 1, Siena, Italy
| | - Giulia Elena Mandoli
- Department of Cardiovascular Diseases, University of Siena, Viale Bracci 1, Siena, Italy
| | - Flavio D'Ascenzi
- Department of Cardiovascular Diseases, University of Siena, Viale Bracci 1, Siena, Italy
| | - Marta Focardi
- Department of Cardiovascular Diseases, University of Siena, Viale Bracci 1, Siena, Italy
| | - Francesco Contorni
- Department of Cardiovascular Diseases, University of Siena, Viale Bracci 1, Siena, Italy
| | - Sergio Mondillo
- Department of Cardiovascular Diseases, University of Siena, Viale Bracci 1, Siena, Italy
| | - Matteo Cameli
- Department of Cardiovascular Diseases, University of Siena, Viale Bracci 1, Siena, Italy
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23
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Iacobelli R, Di Molfetta A, Cobianchi Bellisari F, Toscano A, Filippelli S, Di Chiara L, Pasquini L, Iorio FS, Amodeo A. Changes in left and right ventricular two-dimensional echocardiographic speckle-tracking indices in pediatric LVAD population: A retrospective clinical study. Int J Artif Organs 2019; 42:711-716. [PMID: 31238772 DOI: 10.1177/0391398819857446] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Echocardiographic strain and strain-rate imaging is a promising tool for the evaluation of myocardial segmental function, for the early detection of myocardial dysfunction, and for the prediction of reverse remodeling. We aimed at studying the changes in left and right ventricular function in pulsatile left ventricular assist device pediatric patients by two-dimensional echocardiography and two-dimensional speckle-tracking echocardiography. Echocardiographic and clinical data of patients implanted with a pulsatile-flow left ventricular assist device from 2011 to 2018 were retrospectively reviewed before and after implantation at 1, 3, and 6 months. A total of 18 patients were enrolled. Median age and weight at implantation were 9 months (5-23 months) and 5.85 kg (4.85-8.75 kg), respectively; median left ventricular assist device support was 181 (114.5-289.5) days. 13 patients (73%) were transplanted and 5 patients (27%) died. At follow-up: left ventricular ejection fraction increase at 1 month (p = 0.001) and 3 months (p = 0.01), left ventricular global longitudinal strain improvement at 1 month (p = 0.0008) and 3 months (p = 0.02), and right ventricular free-wall longitudinal strain increase at 1 month (p = 0.01). At short term after left ventricular assist device implantation, both left ventricular and right ventricular mechanics improved. The temporary benefit seems to decrease over time. The worsening of left ventricular function has been followed by a worsening of right ventricular function probably due to the ventricular interdependence.
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Affiliation(s)
- Roberta Iacobelli
- Department of Cardiology and Cardiac Surgery, Bambino Gesù Pediatric Hospital, Rome, Italy
| | - Arianna Di Molfetta
- Department of Cardiac Surgery, Policlinico Universitario A. Gemelli, Rome, Italy
| | | | - Alessandra Toscano
- Department of Cardiology and Cardiac Surgery, Bambino Gesù Pediatric Hospital, Rome, Italy
| | - Sergio Filippelli
- Department of Cardiology and Cardiac Surgery, Bambino Gesù Pediatric Hospital, Rome, Italy
| | - Luca Di Chiara
- Department of Cardiology and Cardiac Surgery, Bambino Gesù Pediatric Hospital, Rome, Italy
| | - Luciano Pasquini
- Department of Cardiology and Cardiac Surgery, Bambino Gesù Pediatric Hospital, Rome, Italy
| | - Fiore Salvatore Iorio
- Department of Cardiology and Cardiac Surgery, Bambino Gesù Pediatric Hospital, Rome, Italy
| | - Antonio Amodeo
- Department of Cardiology and Cardiac Surgery, Bambino Gesù Pediatric Hospital, Rome, Italy
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