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Bijvoet GP, Nies HMJM, Holtackers RJ, Martens BM, Smink J, Linz D, Vernooy K, Wildberger JE, Nijveldt R, Chaldoupi SM, Mihl C. Tissue characterization of acute lesions during cardiac magnetic resonance-guided ablation of cavo-tricuspid isthmus-dependent atrial flutter: a feasibility study. Eur Heart J Cardiovasc Imaging 2024; 25:635-644. [PMID: 38156446 PMCID: PMC11057941 DOI: 10.1093/ehjci/jead334] [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: 08/11/2023] [Revised: 10/18/2023] [Accepted: 11/28/2023] [Indexed: 12/30/2023] Open
Abstract
AIMS To characterize acute lesions during cardiac magnetic resonance (CMR)-guided radiofrequency (RF) ablation of cavo-tricuspid isthmus (CTI)-dependent atrial flutter by combining T2-weighted imaging (T2WI), T1 mapping, first-pass perfusion, and late gadolinium enhancement (LGE) imaging. CMR-guided catheter ablation offers a unique opportunity to investigate acute ablation lesions. Until present, studies only used T2WI and LGE CMR to assess acute lesions. METHODS AND RESULTS Fifteen patients with CTI-dependent atrial flutter scheduled for CMR-guided RF ablation were prospectively enrolled. Directly after achieving bidirectional block of the CTI line, CMR imaging was performed using: T2WI (n = 15), T1 mapping (n = 10), first-pass perfusion (n = 12), and LGE (n = 12) imaging. In case of acute reconnection, additional RF ablation was performed. In all patients, T2WI demonstrated oedema in the ablation region. Right atrial T1 mapping was feasible and could be analysed with a high inter-observer agreement (r = 0.931, ICC 0.921). The increase in T1 values post-ablation was significantly lower in regions showing acute reconnection compared with regions without reconnection [37 ± 90 ms vs. 115 ± 69 ms (P = 0.014), and 3.9 ± 9.0% vs. 11.1 ± 6.8% (P = 0.022)]. Perfusion defects were present in 12/12 patients. The LGE images demonstrated hyper-enhancement with a central area of hypo-enhancement in 12/12 patients. CONCLUSION Tissue characterization of acute lesions during CMR-guided CTI-dependent atrial flutter ablation demonstrates oedema, perfusion defects, and necrosis with a core of microvascular damage. Right atrial T1 mapping is feasible, and may identify regions of acute reconnection that require additional RF ablation.
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Affiliation(s)
- G P Bijvoet
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
- Department of Cardiology, Maastricht University Medical Center, P.Debyelaan 25, PO Box 5800, 6202 AZ Maastricht, The Netherlands
| | - H M J M Nies
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - R J Holtackers
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - B M Martens
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - J Smink
- Department of Clinical Research, Philips Healthcare, Best, The Netherlands
| | - D Linz
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
- Department of Cardiology, Maastricht University Medical Center, P.Debyelaan 25, PO Box 5800, 6202 AZ Maastricht, The Netherlands
- Faculty of Health and Medical Sciences, Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - K Vernooy
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
- Department of Cardiology, Maastricht University Medical Center, P.Debyelaan 25, PO Box 5800, 6202 AZ Maastricht, The Netherlands
| | - J E Wildberger
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - R Nijveldt
- Department of Cardiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - S M Chaldoupi
- Department of Cardiology, Maastricht University Medical Center, P.Debyelaan 25, PO Box 5800, 6202 AZ Maastricht, The Netherlands
| | - C Mihl
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
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Scanavacca MI, Kulchetscki RM, Rochitte CE, Pisani CF. Cardiac Magnetic Resonance to Evaluate Complete Substrate Elimination after Endocardial Ventricular Tachycardia Ablation in Chagas Disease. Arq Bras Cardiol 2024; 121:e20230421. [PMID: 38422351 PMCID: PMC11098567 DOI: 10.36660/abc.20230421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/14/2023] [Accepted: 10/04/2023] [Indexed: 03/02/2024] Open
Affiliation(s)
- Mauricio I. Scanavacca
- Instituto do Coração do Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasil Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - Departamento de Arritmia, São Paulo , SP – Brasil
| | - Rodrigo M. Kulchetscki
- Instituto do Coração do Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasil Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - Departamento de Arritmia, São Paulo , SP – Brasil
| | - Carlos E. Rochitte
- Instituto do Coração do Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasil Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - Departamento de Imagem Cardiovascular, São Paulo , SP – Brasil
| | - Cristiano F. Pisani
- Instituto do Coração do Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasil Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - Departamento de Arritmia, São Paulo , SP – Brasil
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Guglielmo M, Rier S, Zan GD, Krafft AJ, Schmidt M, Kunze KP, Botnar RM, Prieto C, van der Heijden J, Van Driel V, Ramanna H, van der Harst P, van der Bilt I. Cardiac magnetic resonance for early atrial lesion visualization post atrial fibrillation radiofrequency catheter ablation. J Cardiovasc Electrophysiol 2024; 35:258-266. [PMID: 38065834 DOI: 10.1111/jce.16152] [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: 09/08/2023] [Revised: 11/01/2023] [Accepted: 11/27/2023] [Indexed: 02/07/2024]
Abstract
BACKGROUND Incomplete atrial lesions resulting in pulmonary vein-left atrium reconnection after pulmonary vein antrum isolation (PVAI), are related to atrial fibrillation (AF) recurrence. Unfortunately, during the PVAI procedure, fluoroscopy and electroanatomic mapping cannot accurately determine the location and size of the ablation lesions in the atrial wall and this can result in incomplete PVAI lesions (PVAI-L) after radiofrequency catheter ablation (RFCA). AIM We seek to evaluate whether cardiac magnetic resonance (CMR), immediately after RFCA of AF, can identify PVAI-L by characterizing the left atrial tissue. METHODS Ten patients (63.1 ± 5.7 years old, 80% male) receiving a RFCA for paroxysmal AF underwent a CMR before (<1 week) and after (<1 h) the PVAI. Two-dimensional dark-blood T2-weighted short tau inversion recovery (DB-STIR), Three-dimensional inversion-recovery prepared long inversion time (3D-TWILITE) and three-dimensional late gadolinium enhancement (3D-LGE) images were performed to visualize PVAI-L. RESULTS The PVAI-L was visible in 10 patients (100%) using 3D-TWILITE and 3D-LGE. Conversely, On DB-STIR, the ablation core of the PAVI-L could not be identified because of a diffuse high signal of the atrial wall post-PVAI. Microvascular obstruction was identified in 7 (70%) patients using 3D-LGE. CONCLUSION CMR can visualize PVAI-L immediately after the RFCA of AF even without the use of contrast agents. Future studies are needed to understand if the use of CMR for PVAI-L detection after RFCA can improve the results of ablation procedures.
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Affiliation(s)
- Marco Guglielmo
- Department of Cardiology, Division of Heart and Lungs, Utrecht University Medical Center, Utrecht University, Utrecht, The Netherlands
- Department of Cardiology, Haga Teaching Hospital, The Hague, The Netherlands
| | - Sophie Rier
- Department of Cardiology, Haga Teaching Hospital, The Hague, The Netherlands
| | - Giulia De Zan
- Department of Cardiology, Division of Heart and Lungs, Utrecht University Medical Center, Utrecht University, Utrecht, The Netherlands
- Department of Translational Medicine, University of Eastern Piedmont, Novara, Italy
| | | | | | - Karl P Kunze
- MR Research Collaborations, Siemens Healthcare Limited, Camberley, UK
- King's College London, London, UK
| | - Rene M Botnar
- MR Research Collaborations, Siemens Healthcare Limited, Camberley, UK
- King's College London, London, UK
| | - Claudia Prieto
- MR Research Collaborations, Siemens Healthcare Limited, Camberley, UK
- King's College London, London, UK
| | | | - Vincent Van Driel
- Department of Cardiology, Haga Teaching Hospital, The Hague, The Netherlands
| | - Hemanth Ramanna
- Department of Cardiology, Haga Teaching Hospital, The Hague, The Netherlands
| | - Pim van der Harst
- Department of Cardiology, Division of Heart and Lungs, Utrecht University Medical Center, Utrecht University, Utrecht, The Netherlands
| | - Ivo van der Bilt
- Department of Cardiology, Division of Heart and Lungs, Utrecht University Medical Center, Utrecht University, Utrecht, The Netherlands
- Department of Cardiology, Haga Teaching Hospital, The Hague, The Netherlands
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4
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Roca-Luque I, Vázquez-Calvo S, Garre P, Ortiz-Perez JT, Prat-Gonzalez S, Sanchez-Somonte P, Ferro E, Quinto L, Alarcón F, Althoff T, Perea RJ, Figueras i Ventura RM, Guasch E, Tolosana JM, Lorenzatti D, Morr-Verenzuela CI, Porta-Sanchez A, Arbelo E, Sitges M, Brugada J, Mont L. Post-Ablation cardiac Magnetic resonance to assess Ventricular Tachycardia recurrence (PAM-VT study). Eur Heart J Cardiovasc Imaging 2024; 25:188-198. [PMID: 37819047 PMCID: PMC10824475 DOI: 10.1093/ehjci/jead261] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/04/2023] [Accepted: 09/24/2023] [Indexed: 10/13/2023] Open
Abstract
AIMS Conducting channels (CCs) detected by late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) are related to ventricular tachycardia (VT). The aim of this work was to study the ability of post-ablation LGE-CMR to evaluate ablation lesions. METHODS AND RESULTS This is a prospective study of consecutive patients referred for a scar-related VT ablation. LGE-CMR was performed 6-12 months prior to ablation and 3-6 months after ablation. Scar characteristics of pre- and post-ablation LGE-CMR were compared. During the study period (March 2019-April 2021), 61 consecutive patients underwent scar-related VT ablation after LGE-CMR. Overall, 12 patients were excluded (4 had poor-quality LGE-CMR, 2 died before post-ablation LGE-CMR, and 6 underwent post-ablation LGE-CMR 12 months after ablation). Finally, 49 patients (age: 65.5 ± 9.8 years, 97.9% male, left ventricular ejection fraction: 34.8 ± 10.4%, 87.7% ischaemic cardiomyopathy) were included. Post-ablation LGE-CMR showed a decrease in the number (3.34 ± 1.03 vs. 1.6 ± 0.2; P < 0.0001) and mass (8.45 ± 1.3 vs. 3.5 ± 0.6 g; P < 0.001) of CCs. Arrhythmogenic CCs disappeared in 74.4% of patients. Dark core was detected in 75.5% of patients, and its presence was not related to CC reduction (52.2 ± 7.4% vs. 40.8 ± 10.6%, P = 0.57). VT recurrence after one year follow-up was 16.3%. The presence of two or more channels in the post-ablation LGE-CMR was a predictor of VT recurrence (31.82% vs. 0%, P = 0.0038) with a sensibility of 100% and specificity of 61% (area under the curve 0.82). In the same line, a reduction of CCs < 55% had sensibility of 100% and specificity of 61% (area under the curve 0.83) to predict VT recurrence. CONCLUSION Post-ablation LGE-CMR is feasible, and a reduction in the number of CCs is related with lower risk of VT recurrence. The dark core was not present in all patients. A decrease in VT substrate was also observed in patients without a dark core area in the post-ablation LGE-CMR.
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Affiliation(s)
- Ivo Roca-Luque
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Sara Vázquez-Calvo
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Paz Garre
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Jose T Ortiz-Perez
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Susanna Prat-Gonzalez
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Paula Sanchez-Somonte
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Elisenda Ferro
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Levio Quinto
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Francisco Alarcón
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Till Althoff
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Rosario Jesús Perea
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centre de Diagnòstic per la Imatge, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain
| | | | - Eduard Guasch
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - José Maria Tolosana
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Daniel Lorenzatti
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Carlos Igor Morr-Verenzuela
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Andreu Porta-Sanchez
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Elena Arbelo
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Marta Sitges
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Josep Brugada
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Lluís Mont
- Arrhyhtmia Section, Institut Clinic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Villarroel st. 170, Catalonia, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
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Kim D, Collins JD, White JA, Hanneman K, Lee DC, Patel AR, Hu P, Litt H, Weinsaft JW, Davids R, Mukai K, Ng MY, Luetkens JA, Roguin A, Rochitte CE, Woodard PK, Manisty C, Zareba KM, Mont L, Bogun F, Ennis DB, Nazarian S, Webster G, Stojanovska J. SCMR expert consensus statement for cardiovascular magnetic resonance of patients with a cardiac implantable electronic device. J Cardiovasc Magn Reson 2024; 26:100995. [PMID: 38219955 PMCID: PMC11211236 DOI: 10.1016/j.jocmr.2024.100995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 01/09/2024] [Indexed: 01/16/2024] Open
Abstract
Cardiovascular magnetic resonance (CMR) is a proven imaging modality for informing diagnosis and prognosis, guiding therapeutic decisions, and risk stratifying surgical intervention. Patients with a cardiac implantable electronic device (CIED) would be expected to derive particular benefit from CMR given high prevalence of cardiomyopathy and arrhythmia. While several guidelines have been published over the last 16 years, it is important to recognize that both the CIED and CMR technologies, as well as our knowledge in MR safety, have evolved rapidly during that period. Given increasing utilization of CIED over the past decades, there is an unmet need to establish a consensus statement that integrates latest evidence concerning MR safety and CIED and CMR technologies. While experienced centers currently perform CMR in CIED patients, broad availability of CMR in this population is lacking, partially due to limited availability of resources for programming devices and appropriate monitoring, but also related to knowledge gaps regarding the risk-benefit ratio of CMR in this growing population. To address the knowledge gaps, this SCMR Expert Consensus Statement integrates consensus guidelines, primary data, and opinions from experts across disparate fields towards the shared goal of informing evidenced-based decision-making regarding the risk-benefit ratio of CMR for patients with CIEDs.
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Affiliation(s)
- Daniel Kim
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
| | | | - James A White
- Departments of Cardiac Sciences and Diagnostic Imaging, Cummings School of Medicine, University of Calgary, Calgary, Canada
| | - Kate Hanneman
- Department of Medical Imaging, University Medical Imaging Toronto, Toronto General Hospital and Peter Munk Cardiac Centre, University of Toronto, Toronto, Canada
| | - Daniel C Lee
- Department of Medicine (Division of Cardiology), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Amit R Patel
- Cardiovascular Division, University of Virginia, Charlottesville, VA, USA
| | - Peng Hu
- School of Biomedical Engineering, ShanghaiTech University, Shanghai, China
| | - Harold Litt
- Department of Radiology, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA, USA
| | - Jonathan W Weinsaft
- Department of Medicine (Division of Cardiology), Weill Cornell Medicine, New York, NY, USA
| | - Rachel Davids
- SHS AM NAM USA DI MR COLLAB ADV-APPS, Siemens Medical Solutions USA, Inc., Chicago, Il, USA
| | - Kanae Mukai
- Salinas Valley Memorial Healthcare System, Ryan Ranch Center for Advanced Diagnostic Imaging, Monterey, CA, USA
| | - Ming-Yen Ng
- Department of Diagnostic Radiology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, the Hong Kong Special Administrative Region of China
| | - Julian A Luetkens
- Department of Diagnostic and Interventional Radiology, University Hospital Bonn, Venusberg-Campus 1, Bonn, Germany
| | - Ariel Roguin
- Department of Cardiology, Hillel Yaffe Medical Center, Hadera and Faculty of Medicine. Technion - Israel Institute of Technology, Israel
| | - Carlos E Rochitte
- Heart Institute, InCor, University of São Paulo Medical School, São Paulo, SP, Brazil
| | - Pamela K Woodard
- Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Charlotte Manisty
- Institute of Cardiovascular Science, University College London, London, UK
| | - Karolina M Zareba
- Division of Cardiovascular Medicine, The Ohio State University, Columbus, OH, USA
| | - Lluis Mont
- Cardiovascular Institute, Hospital Clínic, University of Barcelona, Catalonia, Spain
| | - Frank Bogun
- Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Daniel B Ennis
- Department of Radiology, Stanford University, Stanford, CA, USA
| | - Saman Nazarian
- Section of Cardiac Electrophysiology, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA, USA
| | - Gregory Webster
- Department of Pediatrics (Cardiology), Ann & Robert H. Lurie Children's Hospital, Chicago, IL, USA
| | - Jadranka Stojanovska
- Department of Radiology, Grossman School of Medicine, New York University, New York, NY, USA
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Tampakis K, Pastromas S, Sykiotis A, Kampanarou S, Kourgiannidis G, Pyrpiri C, Bousoula M, Rozakis D, Andrikopoulos G. Real-time cardiovascular magnetic resonance-guided radiofrequency ablation: A comprehensive review. World J Cardiol 2023; 15:415-426. [PMID: 37900261 PMCID: PMC10600785 DOI: 10.4330/wjc.v15.i9.415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 08/10/2023] [Accepted: 08/31/2023] [Indexed: 09/21/2023] Open
Abstract
Cardiac magnetic resonance (CMR) imaging could enable major advantages when guiding in real-time cardiac electrophysiology procedures offering high-resolution anatomy, arrhythmia substrate, and ablation lesion visualization in the absence of ionizing radiation. Over the last decade, technologies and platforms for performing electrophysiology procedures in a CMR environment have been developed. However, performing procedures outside the conventional fluoroscopic laboratory posed technical, practical and safety concerns. The development of magnetic resonance imaging compatible ablation systems, the recording of high-quality electrograms despite significant electromagnetic interference and reliable methods for catheter visualization and lesion assessment are the main limiting factors. The first human reports, in order to establish a procedural workflow, have rationally focused on the relatively simple typical atrial flutter ablation and have shown that CMR-guided cavotricuspid isthmus ablation represents a valid alternative to conventional ablation. Potential expansion to other more complex arrhythmias, especially ventricular tachycardia and atrial fibrillation, would be of essential impact, taking into consideration the widespread use of substrate-based strategies. Importantly, all limitations need to be solved before application of CMR-guided ablation in a broad clinical setting.
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Affiliation(s)
- Konstantinos Tampakis
- Department of Pacing & Electrophysiology, Henry Dunant Hospital Center, Athens 11526, Greece.
| | - Sokratis Pastromas
- Department of Pacing & Electrophysiology, Henry Dunant Hospital Center, Athens 11526, Greece
| | - Alexandros Sykiotis
- Department of Pacing & Electrophysiology, Henry Dunant Hospital Center, Athens 11526, Greece
| | | | - Georgios Kourgiannidis
- Department of Pacing & Electrophysiology, Henry Dunant Hospital Center, Athens 11526, Greece
| | - Chrysa Pyrpiri
- Department of Radiology, Henry Dunant Hospital Center, Athens 11526, Greece
| | - Maria Bousoula
- Department of Anesthesiology, Henry Dunant Hospital Center, Athens 11526, Greece
| | - Dimitrios Rozakis
- Department of Anesthesiology, Henry Dunant Hospital Center, Athens 11526, Greece
| | - George Andrikopoulos
- Department of Pacing & Electrophysiology, Henry Dunant Hospital Center, Athens 11526, Greece
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Rogers T, Campbell-Washburn AE, Ramasawmy R, Yildirim DK, Bruce CG, Grant LP, Stine AM, Kolandaivelu A, Herzka DA, Ratnayaka K, Lederman RJ. Interventional cardiovascular magnetic resonance: state-of-the-art. J Cardiovasc Magn Reson 2023; 25:48. [PMID: 37574552 PMCID: PMC10424337 DOI: 10.1186/s12968-023-00956-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 07/25/2023] [Indexed: 08/15/2023] Open
Abstract
Transcatheter cardiovascular interventions increasingly rely on advanced imaging. X-ray fluoroscopy provides excellent visualization of catheters and devices, but poor visualization of anatomy. In contrast, magnetic resonance imaging (MRI) provides excellent visualization of anatomy and can generate real-time imaging with frame rates similar to X-ray fluoroscopy. Realization of MRI as a primary imaging modality for cardiovascular interventions has been slow, largely because existing guidewires, catheters and other devices create imaging artifacts and can heat dangerously. Nonetheless, numerous clinical centers have started interventional cardiovascular magnetic resonance (iCMR) programs for invasive hemodynamic studies or electrophysiology procedures to leverage the clear advantages of MRI tissue characterization, to quantify cardiac chamber function and flow, and to avoid ionizing radiation exposure. Clinical implementation of more complex cardiovascular interventions has been challenging because catheters and other tools require re-engineering for safety and conspicuity in the iCMR environment. However, recent innovations in scanner and interventional device technology, in particular availability of high performance low-field MRI scanners could be the inflection point, enabling a new generation of iCMR procedures. In this review we review these technical considerations, summarize contemporary clinical iCMR experience, and consider potential future applications.
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Affiliation(s)
- Toby Rogers
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA.
- Section of Interventional Cardiology, MedStar Washington Hospital Center, 110 Irving St NW, Suite 4B01, Washington, DC, 20011, USA.
| | - Adrienne E Campbell-Washburn
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
| | - Rajiv Ramasawmy
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
| | - D Korel Yildirim
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
| | - Christopher G Bruce
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
| | - Laurie P Grant
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
| | - Annette M Stine
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
| | - Aravindan Kolandaivelu
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
- Johns Hopkins Hospital, Baltimore, MD, USA
| | - Daniel A Herzka
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
| | - Kanishka Ratnayaka
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA
- Rady Children's Hospital, San Diego, CA, USA
| | - Robert J Lederman
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10/Room 2C713, 9000 Rockville Pike, Bethesda, MD, 20892-1538, USA.
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Kawamura I, Reddy VY, Santos-Gallego CG, Wang BJ, Chaudhry HW, Buck ED, Mavroudis G, Jerrell S, Schneider CW, Speltz M, Dukkipati SR, Koruth JS. Electrophysiology, Pathology, and Imaging of Pulsed Field Ablation of Scarred and Healthy Ventricles in Swine. Circ Arrhythm Electrophysiol 2023; 16:e011369. [PMID: 36595634 DOI: 10.1161/circep.122.011369] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Pulsed field ablation (PFA) has recently been shown to penetrate ischemic scar, but details on its efficacy, risk of arrhythmias, and imaging insights are lacking. In a porcine model of myocardial scar, we studied the ability of ventricular PFA to penetrate scarred tissue, induce ventricular arrhythmias, and assess the influence of QRS gating during pulse delivery. METHODS Of a total of 6 swine, 5 underwent coronary occlusion and 1 underwent radiofrequency ablation to create infarct scar and iatrogenic scar models, respectively. Two additional swine served as healthy controls. An 8 Fr focal PFA catheter was used to deliver bipolar, biphasic PFA (2.0 kV) lesions guided by electroanatomical mapping, fluoroscopy, and intracardiac echocardiography over both scarred and healthy myocardium. Swine underwent magnetic resonance imaging 2-7 days post-PFA. RESULTS PFA successfully penetrated scar without significant difference in lesion depth between lesion at the infarct border (5.9±1.0 mm, n=41) and healthy myocardium (5.7±1.3 mm, n=26; P=0.53). PFA penetration of both infarct and iatrogenic radiofrequency abalation scar was observed in all examined sections. Sustained ventricular arrhythmias requiring defibrillation occurred in 4 of 187 (2.1%) ungated applications, whereas no ventricular arrhythmias occurred during gated PFA applications (0 of 64 [0%]). Dark-blood late-gadolinium-enhanced sequences allowed for improved endocardial border detection as well as lesion boundaries compared with conventional bright-blood late-gadolinium-enhanced sequences. CONCLUSIONS PFA penetrates infarct and iatrogenic scar successfully to create deep lesions. Gated delivery eliminates the occurrence of ventricular arrhythmias observed with ungated porcine PFA. Optimized magnetic resonance imaging sequences can be helpful in detecting lesion boundaries.
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Affiliation(s)
- Iwanari Kawamura
- Helmsley Electrophysiology Center (I.K., V.Y.R., S.R.D., J.S.K.)
| | - Vivek Y Reddy
- Helmsley Electrophysiology Center (I.K., V.Y.R., S.R.D., J.S.K.)
| | | | - Bingyan J Wang
- Cardiovascular Regenerative Medicine, Department of Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY (B.J.W., H.W.C.)
| | - Hina W Chaudhry
- Cardiovascular Regenerative Medicine, Department of Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY (B.J.W., H.W.C.)
| | - Eric D Buck
- FARAPULSE, Menlo Park, CA (E.D.B., G.M., S.J., C.W.S.). R. & M. Speltz, LLC, Pathology Services, Stanchfield, MN
| | - George Mavroudis
- FARAPULSE, Menlo Park, CA (E.D.B., G.M., S.J., C.W.S.). R. & M. Speltz, LLC, Pathology Services, Stanchfield, MN
| | - Samantha Jerrell
- FARAPULSE, Menlo Park, CA (E.D.B., G.M., S.J., C.W.S.). R. & M. Speltz, LLC, Pathology Services, Stanchfield, MN
| | - Christopher W Schneider
- FARAPULSE, Menlo Park, CA (E.D.B., G.M., S.J., C.W.S.). R. & M. Speltz, LLC, Pathology Services, Stanchfield, MN
| | | | | | - Jacob S Koruth
- Helmsley Electrophysiology Center (I.K., V.Y.R., S.R.D., J.S.K.)
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9
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Padilla-Cueto D, Ferro E, Garre P, Prat S, Guichard JB, Perea RJ, Tolosana JM, Guasch E, Arbelo E, Porta-Sanchéz A, Roca-Luque I, Sitges M, Brugada J, Mont L, Althoff TF. Non-invasive assessment of pulmonary vein isolation durability using late gadolinium enhancement magnetic resonance imaging. Europace 2022; 25:360-365. [PMID: 36125227 PMCID: PMC9935036 DOI: 10.1093/europace/euac163] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 08/19/2022] [Indexed: 11/13/2022] Open
Abstract
AIMS Electrical reconnection of pulmonary veins (PVs) is considered an important determinant of recurrent atrial fibrillation (AF) after pulmonary vein isolation (PVI). To date, AF recurrences almost automatically trigger invasive repeat procedures, required to assess PVI durability. With recent technical advances, it is becoming increasingly common to find all PVs isolated in those repeat procedures. Thus, as ablation of extra-PV targets has failed to show benefit in randomized trials, more and more often these highly invasive procedures are performed only to rule out PV reconnection. Here we aim to define the ability of late gadolinium enhancement (LGE)-magnetic resonance imaging (MRI) to rule out PV reconnection non-invasively. METHODS AND RESULTS This study is based on a prospective registry in which all patients receive an LGE-MRI after AF ablation. Included were all patients that-after an initial PVI and post-ablation LGE-MRI-underwent an invasive repeat procedure, which served as a reference to determine the predictive value of non-invasive lesion assessment by LGE-MRI.: 152 patients and 304 PV pairs were analysed. LGE-MRI predicted electrical PV reconnection with high sensitivity (98.9%) but rather low specificity (55.6%). Of note, LGE lesions without discontinuation ruled out reconnection of the respective PV pair with a negative predictive value of 96.9%, and patients with complete LGE lesion sets encircling all PVs were highly unlikely to show any PV reconnection (negative predictive value: 94.4%). CONCLUSION LGE-MRI has the potential to guide selection of appropriate candidates and planning of the ablation strategy for repeat procedures and may help to identify patients that will not benefit from a redo-procedure if no ablation of extra-PV targets is intended.
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Affiliation(s)
- David Padilla-Cueto
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain
| | - Elisenda Ferro
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain
| | - Paz Garre
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain
| | - Susanna Prat
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), 28029 Madrid, Spain
| | - Jean-Baptiste Guichard
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Department of Cardiology, University Hospital of Saint-Étienne, 42055 Saint-Étienne, France
| | - Rosario J Perea
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain
| | - Jose Maria Tolosana
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), 28029 Madrid, Spain
| | - Eduard Guasch
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), 28029 Madrid, Spain
| | - Elena Arbelo
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), 28029 Madrid, Spain
| | - Andreu Porta-Sanchéz
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), 28029 Madrid, Spain
| | - Ivo Roca-Luque
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), 28029 Madrid, Spain
| | - Marta Sitges
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), 28029 Madrid, Spain
| | - Josep Brugada
- Atrial Fibrillation Unit, Department of Cardiology, Cardiovascular Institute (ICCV), CLÍNIC—University Hospital Barcelona, C/Villarroel N° 170, 08036 Barcelona, Catalonia, Spain,Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), 28029 Madrid, Spain
| | | | - Till F Althoff
- Corresponding author: Tel: +34 93 2275551, fax: +34 93 4513045. E-mail address:
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10
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Mont L, Roca-Luque I, Althoff TF. Ablation Lesion Assessment with MRI. Arrhythm Electrophysiol Rev 2022; 11:e02. [PMID: 35444808 PMCID: PMC9014705 DOI: 10.15420/aer.2021.63] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 12/11/2021] [Indexed: 12/17/2022] Open
Abstract
Late gadolinium enhancement (LGE) MRI is capable of detecting not only native cardiac fibrosis, but also ablation-induced scarring. Thus, it offers the unique opportunity to assess ablation lesions non-invasively. In the atrium, LGE-MRI has been shown to accurately detect and localise gaps in ablation lines. With a negative predictive value close to 100% it can reliably rule out pulmonary vein reconnection non-invasively and thus may avoid unnecessary invasive repeat procedures where a pulmonary vein isolation only approach is pursued. Even LGE-MRI-guided repeat pulmonary vein isolation has been demonstrated to be feasible as a standalone approach. LGE-MRI-based lesion assessment may also be of value to evaluate the efficacy of ventricular ablation. In this respect, the elimination of LGE-MRI-detected arrhythmogenic substrate may serve as a potential endpoint, but validation in clinical studies is lacking. Despite holding great promise, the widespread use of LGE-MRI is still limited by the absence of standardised protocols for image acquisition and post-processing. In particular, reproducibility across different centres is impeded by inconsistent thresholds and internal references to define fibrosis. Thus, uniform methodological and analytical standards are warranted to foster a broader implementation in clinical practice.
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Affiliation(s)
- Lluís Mont
- Arrhythmia Section, Cardiovascular Institute, Clínic - University Hospital Barcelona Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Ivo Roca-Luque
- Arrhythmia Section, Cardiovascular Institute, Clínic - University Hospital Barcelona Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Till F Althoff
- Arrhythmia Section, Cardiovascular Institute, Clínic - University Hospital Barcelona Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Department of Cardiology and Angiology, Charité University Medicine Berlin, Berlin, Germany.,German Centre for Cardiovascular Research (DZHK), Berlin, Germany
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11
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Krahn PRP, Biswas L, Ferguson S, Ramanan V, Barry J, Singh SM, Pop M, Wright GA. MRI-Guided Cardiac RF Ablation for Comparing MRI Characteristics of Acute Lesions and Associated Electrophysiologic Voltage Reductions. IEEE Trans Biomed Eng 2022; 69:2657-2666. [PMID: 35171765 DOI: 10.1109/tbme.2022.3152145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Objective: Radiofrequency (RF) energy delivered to cardiac tissue produces a core ablation lesion with surrounding edema, the latter of which has been implicated in acute procedural failure of Ventricular Tachycardia (VT) ablation and late arrhythmia recurrence. This study sought to investigate the electrophysiological characteristics of acute RF lesions in the left ventricle (LV) visualized with native-contrast Magnetic Resonance Imaging (MRI). Methods: An MR-guided electrophysiology system was used to deliver RF ablation in the LV of 8 swine (9 RF lesions in total), then perform MRI and electroanatomic mapping. The permanent RF lesions and transient edema were delineated via native-contrast MRI segmentation of T1-weighted images and T2 maps respectively. Bipolar voltage measurements were matched with image characteristics of pixels adjacent to the catheter tip. Native-contrast MR visualization was verified with 3D late gadolinium enhanced MRI and histology. Results: The T2-derived edema was significantly larger than the T1-derived RF lesion (2.11.5 mL compared to 0.580.34 mL; p=0.01). Bipolar voltage was significantly reduced in the presence of RF lesion core (p<0.05) and edema (p<0.05), with similar trends suggesting that both the permanent lesion and transient edema contributed to the region of reduced voltage. While bipolar voltage was significantly decreased where RF lesions are present (p<0.05), voltage did not change significantly with lesion transmurality (p>0.05). Conclusion: Permanent RF lesions and transient edema are distinct in native-contrast MR images, but not differentiable using bipolar voltage. Significance: Intraprocedural native-contrast MRI may provide valuable lesion assessment in MR-guided ablation, whose clinical application is now feasible.
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12
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Nakamura K, Sasaki T, Koyama K, Naito S. A confluent non-enhanced dark core on serial late gadolinium enhancement imaging after a moderator band-ventricular tachycardia ablation. Indian Pacing Electrophysiol J 2022; 22:154-157. [PMID: 35134485 PMCID: PMC9091750 DOI: 10.1016/j.ipej.2022.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/12/2022] [Accepted: 02/03/2022] [Indexed: 10/26/2022] Open
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13
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Desai MJ, Safriel Y. MRI for in vivo Analysis of Ablation Zones Formed by Cooled Radiofrequency Neurotomy to Treat Chronic Joint Pain Across Multiple Axial Spine Sites. J Pain Res 2022; 15:423-430. [PMID: 35177931 PMCID: PMC8843798 DOI: 10.2147/jpr.s342795] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 01/18/2022] [Indexed: 12/02/2022] Open
Abstract
Purpose Radiofrequency (RF) ablation is the targeted damage of neural tissues to disrupt pain transmission in sensory nerves using thermal energy generated in situ by an RF probe. The present study aims to evaluate the utility of magnetic resonance imaging (MRI) for in vivo quantitative assessment of ablation zones in human subjects following cooled radiofrequency neurotomy for chronic pain at spinal facet or sacroiliac joints. Ablation zone size and shape have been shown in animal models to be influenced by size and type of RF probe – with cooled RF probes typically forming larger, more spherical ablation zones. To date, MRI of RF ablation zones in humans has been limited to two single retrospective case reports. Patients and Methods A prospective, open-label pilot study of MRI for evaluation of cooled radiofrequency ablation zones following standard of care procedures in adult outpatients was conducted. Adult subjects (n=13) received monopolar cooled RF (CRF) ablation (COOLIEF™, Avanos Medical) of sensory nerves at spinal facet or sacroiliac joints, followed by an MRI 2–7 days after the procedure. MRI data were acquired using both Short Tau Inversion Recovery (STIR) and contrast-enhanced T1-weighted (T1C) protocols. T1C MRI was used to calculate 3-dimensional ellipsoid ablation zone volumes (V), where well-defined regions of signal hyperintensity were used to identify three orthogonal diameters (T, D, L) and apply the formula V=π/6×T×D×L. Results Among 13 patients, 96 CRF ablation zones were created at 4 different anatomic sites (sacroiliac, lumbar, thoracic and cervical). CRF ablation zone morphology varied by anatomical location and structural features of surrounding tissues. In some cases, proximity to bone and striations of surrounding musculature obscured ablation zone borders. The volumes of 75 of the 96 ablation zones were measurable from MRI, with values (mean±SD) ranging from 0.4679 (±0.29) cm3 to 2.735 (±2.62) cm3 for the cervical and thoracic sites, respectively. Conclusion In vivo T1C MRI analysis of cooled RF ablation zones at spinal facet and sacroiliac joints demonstrated variable effects of local tissues on ablation zone morphology. Placement of the CRFA probe very close to bone alters the ablation zone in a negative way, causing non-spherical and incomplete lesioning. These new data may serve to inform practicing physicians about optimal cooled RF probe placement in clinical procedures.
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Affiliation(s)
- Mehul J Desai
- International Spine, Pain & Performance Center, Washington, DC, USA
- Department of Anesthesiology and Critical Care, George Washington University, School of Medicine & Health Sciences, Washington, DC, USA
- Correspondence: Mehul J Desai, International Spine, Pain & Performance Center, Washington, DC, 20006, USA, Tel +1 202 808 8295, Email
| | - Yair Safriel
- Pharmascan, Wilmington, DE, USA
- University of South Florida Affiliated Programs, Clearwater, FL, USA
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14
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González-Suárez A, Pérez JJ, Irastorza RM, D'Avila A, Berjano E. Computer modeling of radiofrequency cardiac ablation: 30 years of bioengineering research. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2022; 214:106546. [PMID: 34844766 DOI: 10.1016/j.cmpb.2021.106546] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/08/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
This review begins with a rationale of the importance of theoretical, mathematical and computational models for radiofrequency (RF) catheter ablation (RFCA). We then describe the historical context in which each model was developed, its contribution to the knowledge of the physics of RFCA and its implications for clinical practice. Next, we review the computer modeling studies intended to improve our knowledge of the biophysics of RFCA and those intended to explore new technologies. We describe the most important technical details of the implementation of mathematical models, including governing equations, tissue properties, boundary conditions, etc. We discuss the utility of lumped element models, which despite their simplicity are widely used by clinical researchers to provide a physical explanation of how RF power is absorbed in different tissues. Computer model verification and validation are also discussed in the context of RFCA. The article ends with a section on the current limitations, i.e. aspects not yet included in state-of-the-art RFCA computer modeling and on future work aimed at covering the current gaps.
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Affiliation(s)
- Ana González-Suárez
- Electrical and Electronic Engineering, National University of Ireland Galway, Ireland; Translational Medical Device Lab, National University of Ireland Galway, Ireland
| | - Juan J Pérez
- Department of Electronic Engineering, BioMIT, Universitat Politècnica de València, Valencia, Spain
| | - Ramiro M Irastorza
- Instituto de Física de Líquidos y Sistemas Biológicos (CONICET), La Plata, Argentina; Instituto de Ingeniería y Agronomía, Universidad Nacional Arturo Jauretche, Florencio Varela, Argentina
| | - Andre D'Avila
- Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Enrique Berjano
- Department of Electronic Engineering, BioMIT, Universitat Politècnica de València, Valencia, Spain.
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15
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Bauer BK, Meier C, Bietenbeck M, Lange PS, Eckardt L, Yilmaz A. Cardiovascular Magnetic Resonance-Guided Radiofrequency Ablation: Where Are We Now? JACC Clin Electrophysiol 2022; 8:261-274. [PMID: 35210090 DOI: 10.1016/j.jacep.2021.11.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/08/2021] [Accepted: 11/17/2021] [Indexed: 11/16/2022]
Abstract
The possibilities of cardiovascular magnetic resonance (CMR) imaging for myocardial tissue characterization and catheter ablation guidance are accompanied by some fictional concepts. In this review, we present the available facts about CMR-guided catheter ablation procedures as well as promising, however unproven, theoretical concepts. CMR promises to visualize the respective arrhythmogenic substrate and may thereby make it more localizable for electrophysiology (EP)-based ablation. Robust CMR imaging is challenged by motion of the heart resulting from cardiac and respiratory cycles. In contrast to conventional "passive" tracking of the catheter tip by real-time CMR, novel approaches based on "active" tracking are performed by integrating microcoils into the catheter tip that send a receiver signal. Several experimental and clinical studies were already performed based on real-time CMR for catheter ablation of atrial and ventricular arrhythmias. Importantly, successful ablation of the cavotricuspid isthmus was already performed in patients with typical atrial flutter. However, a complete EP procedure with real-time CMR-guided transseptal puncture and subsequent pulmonary vein isolation has not been shown so far in patients with atrial fibrillation. Moreover, real-time CMR-guided EP for ventricular tachycardia ablation was only performed in animal models using a transseptal, retrograde, or epicardial access-but not in humans. Essential improvements within the next few years regarding basic technical requirements, such as higher spatial and temporal resolution of real-time CMR imaging as well as clinically approved cardiac magnetic resonance-conditional defibrillators, are ultimately required-but can also be expected-and will move this field forward.
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Affiliation(s)
- Bastian Klemens Bauer
- Department of Cardiology II - Electrophysiology, University Hospital Münster, Münster, Germany
| | - Claudia Meier
- Department of Cardiology, Division of Cardiovascular Imaging, University Hospital Münster, Münster, Germany
| | - Michael Bietenbeck
- Department of Cardiology, Division of Cardiovascular Imaging, University Hospital Münster, Münster, Germany
| | - Philipp Sebastian Lange
- Department of Cardiology II - Electrophysiology, University Hospital Münster, Münster, Germany
| | - Lars Eckardt
- Department of Cardiology II - Electrophysiology, University Hospital Münster, Münster, Germany
| | - Ali Yilmaz
- Department of Cardiology, Division of Cardiovascular Imaging, University Hospital Münster, Münster, Germany.
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16
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El Hajjar AH, Huang C, Zhang Y, Mekhael M, Noujaim C, Dagher L, Nedunchezhian S, Pottle C, Kholmovski E, Ayoub T, Dhorepatil A, Barakat M, Yamaguchi T, Chelu M, Marrouche N. Acute Lesion Imaging in Predicting Chronic Tissue Injury in the Ventricles. Front Cardiovasc Med 2022; 8:791217. [PMID: 35155604 PMCID: PMC8831749 DOI: 10.3389/fcvm.2021.791217] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 12/07/2021] [Indexed: 11/26/2022] Open
Abstract
Background Chronic lesion formation after cardiac tissue ablation is an important indicator for procedural outcome. Moreover, there is a lack of knowledge regarding the features that predict chronic lesion formation. Objective The aim of this study is to determine whether acute lesion visualization using late gadolinium enhanced magnetic resonance imaging (LGE-MRI) can reliably predict chronic lesion size. Methods Focal lesions were created in left and right ventricles of canine models using either radiofrequency (RF) ablation or cryofocal ablation. Multiple ablation parameters were used. The first LGE-MRI was acquired within 1–5 h post-ablation and the second LGE-MRI was obtained 47–82 days later. Corview software was used to perform lesion segmentations and size calculations. Results: Fifty-Five lesions were created in different locations in the ventricles. Chronic volume size decreased by a mean of 62.5 % (95% CI 58.83–67.97, p < 0.0005). Similar regression of lesion volume was observed regardless of ablation location (p = 0.32), ablation technique (p = 0.94), duration (p = 0.37), power (p = 0.55) and whether lesions were connected or not (p = 0.35). There was no significant difference in lesion volume reduction assessed at 47–54 days and 72–82 days after ablation (p = 0.31). Chronic lesion volume was equal to 0.32 of the acute lesion volumes (R2 = 0.75). Conclusion Chronic tissue injury related to catheter ablation can be reliably modeled as a linear function of the acute lesion volume as assessed by LGE-MRI, regardless of the ablation parameters.
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Affiliation(s)
- Abdel Hadi El Hajjar
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Chao Huang
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Yichi Zhang
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Mario Mekhael
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Charbel Noujaim
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Lilas Dagher
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Saihariharan Nedunchezhian
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Christopher Pottle
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Eugene Kholmovski
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, United States
| | - Tarek Ayoub
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Aneesh Dhorepatil
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
| | - Michel Barakat
- Department of Cardiology, PeaceHealth, Bellingham, WA, United States
| | | | - Mihail Chelu
- Baylor Heart Clinic, Baylor College of Medicine, Houston, TX, United States
| | - Nassir Marrouche
- Tulane Research Innovation for Arrhythmia Discoveries, Tulane University School of Medicine, New Orleans, LA, United States
- *Correspondence: Nassir Marrouche
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El‐Harasis MA, Richardson TD. Can Dark Core Lesions on Cardiac MRI Shed Some Light on Recurrence After VT Ablation? J Cardiovasc Electrophysiol 2022; 33:722-724. [DOI: 10.1111/jce.15381] [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: 01/10/2022] [Accepted: 01/13/2022] [Indexed: 12/01/2022]
Affiliation(s)
- Majd A. El‐Harasis
- Division of Cardiovascular MedicineVanderbilt University Medical CenterNashvilleTNUSA
| | - Travis D. Richardson
- Division of Cardiovascular MedicineVanderbilt University Medical CenterNashvilleTNUSA
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18
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Roca-Luque I, Mont-Girbau L. Cardiac Magnetic Resonance for Ventricular Tachycardia Ablation and Risk Stratification. Front Cardiovasc Med 2022; 8:797864. [PMID: 35097017 PMCID: PMC8790056 DOI: 10.3389/fcvm.2021.797864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 11/17/2021] [Indexed: 11/10/2022] Open
Abstract
Ventricular tachycardia is the most frequent cause of sudden cardiovascular death in patients with structural heart disease. Radiofrequency ablation is the treatment cornerstone in this population. Main mechanism for structural heart disease-related ventricular tachycardia is re-entry due to presence of slow conduction area within the scar tissue. Electroanatomical mapping with high density catheters can elucidate the presence of both scar (voltage maps) and slow conduction (activation maps). Despite the technological improvements recurrence rate after ventricular tachycardia ablation is high. Cardiac magnetic resonance has demonstrated to be useful to define the location of the scar tissue in endocardium, midmyocardium and/or epicardial region. Furthermore, recent studies have shown that cardiac magnetic resonance can analyse in detail the ventricular tachycardia substrate in terms of core scar and border zone tissue. This detailed tissue analysis has been proved to have good correlation with slow conduction areas and ventricular tachycardia isthmuses in electroanatomical maps. This review will provide a summary of the current role of cardiac magnetic resonance in different scenarios related with ventricular tachycardia in patients with structural heart disease, its limitations and the future perspectives.
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Affiliation(s)
- Ivo Roca-Luque
- Arrhythmia Section, Cardiology Department, Cardiovascular Clinical Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain,Centro de Investigación Médica en Red, Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain,*Correspondence: Ivo Roca-Luque
| | - Lluis Mont-Girbau
- Arrhythmia Section, Cardiology Department, Cardiovascular Clinical Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain,Centro de Investigación Médica en Red, Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
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19
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Althoff TF, Garre P, Caixal G, Perea R, Prat S, Tolosana JM, Guasch E, Roca-Luque I, Arbelo E, Sitges M, Brugada J, Mont L. Late gadolinium enhancement-MRI determines definite lesion formation most accurately at 3 months post ablation compared to later time points. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2021; 45:72-82. [PMID: 34820857 DOI: 10.1111/pace.14415] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/22/2021] [Accepted: 11/12/2021] [Indexed: 11/28/2022]
Abstract
AIMS Neither the long-term development of ablation lesions nor the capability of late gadolinium enhancement (LGE)-MRI to detect ablation-induced fibrosis at late stages of scar formation have been defined. We sought to assess the development of atrial ablation lesions over time using LGE-MRI and invasive electroanatomical mapping (EAM). METHODS AND RESULTS Ablation lesions and total atrial fibrosis were assessed in serial LGE-MRI scans 3 months and >12 months post pulmonary vein (PV) isolation. High-density EAM performed in subsequent repeat ablation procedures served as a reference. Serial LGE-MRI of 22 patients were analyzed retrospectively. The PV encircling ablation lines displayed an average LGE, indicative of ablation-induced fibrosis, of 91.7% ± 7.0% of the circumference at 3 months, but only 62.8% ± 25.0% at a median of 28 months post ablation (p < 0.0001). EAM performed in 18 patients undergoing a subsequent repeat procedure revealed that the consistent decrease in LGE over time was owed to a reduced detectability of ablation-induced fibrosis by LGE-MRI at time-points > 12 months post ablation. Accordingly, the agreement with EAM regarding detection of ablation-induced fibrosis and functional gaps was good for the LGE-MRI at 3 months (κ .74; p < .0001), but only weak for the LGE-MRI at 28 months post-ablation (κ .29; p < .0001). CONCLUSION While non-invasive lesion assessment with LGE-MRI 3 months post ablation provides accurate guidance for future redo-procedures, detectability of atrial ablation lesions appears to decrease over time. Thus, it should be considered to perform LGE-MRI 3 months post-ablation rather than at later time-points > 12 months post ablation, like for example, prior to a planned redo-ablation procedure.
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Affiliation(s)
- Till F Althoff
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Department of Cardiology and Angiology, Charité - University Medicine Berlin, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Berlin, Germany
| | - Paz Garre
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Gala Caixal
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Rosario Perea
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Susanna Prat
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Jose Maria Tolosana
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Eduard Guasch
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Ivo Roca-Luque
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Elena Arbelo
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Marta Sitges
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Josep Brugada
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
| | - Lluís Mont
- Hospital Clínic Atrial Fibrillation Unit (UFA), Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Cardiovascular (CIBERCV), Madrid, Spain
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20
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Kolandaivelu A, Bruce CG, Ramasawmy R, Yildirim DK, O'Brien KJ, Schenke WH, Rogers T, Campbell-Washburn AE, Lederman RJ, Herzka DA. Native contrast visualization and tissue characterization of myocardial radiofrequency ablation and acetic acid chemoablation lesions at 0.55 T. J Cardiovasc Magn Reson 2021; 23:50. [PMID: 33952312 PMCID: PMC8101152 DOI: 10.1186/s12968-020-00693-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 12/09/2020] [Indexed: 01/18/2023] Open
Abstract
PURPOSE Low-field (0.55 T) high-performance cardiovascular magnetic resonance (CMR) is an attractive platform for CMR-guided intervention as device heating is reduced around 7.5-fold compared to 1.5 T. This work determines the feasibility of visualizing cardiac radiofrequency (RF) ablation lesions at low field CMR and explores a novel alternative method for targeted tissue destruction: acetic acid chemoablation. METHODS N = 10 swine underwent X-ray fluoroscopy-guided RF ablation (6-7 lesions) and acetic acid chemoablation (2-3 lesions) of the left ventricle. Animals were imaged at 0.55 T with native contrast 3D-navigator gated T1-weighted T1w) CMR for lesion visualization, gated single-shot imaging to determine potential for real-time visualization of lesion formation, and T1 mapping to measure change in T1 in response to ablation. Seven animals were euthanized on ablation day and hearts imaged ex vivo. The remaining animals were imaged again in vivo at 21 days post ablation to observe lesion evolution. RESULTS Chemoablation lesions could be visualized and displayed much higher contrast than necrotic RF ablation lesions with T1w imaging. On the day of ablation, in vivo myocardial T1 dropped by 19 ± 7% in RF ablation lesion cores, and by 40 ± 7% in chemoablation lesion cores (p < 4e-5). In high resolution ex vivo imaging, with reduced partial volume effects, lesion core T1 dropped by 18 ± 3% and 42 ± 6% for RF and chemoablation, respectively. Mean, median, and peak lesion signal-to-noise ratio (SNR) were all at least 75% higher with chemoablation. Lesion core to myocardium contrast-to-noise (CNR) was 3.8 × higher for chemoablation. Correlation between in vivo and ex vivo CMR and histology indicated that the periphery of RF ablation lesions do not exhibit changes in T1 while the entire extent of chemoablation exhibits T1 changes. Correlation of T1w enhancing lesion volumes indicated in vivo estimates of lesion volume are accurate for chemoablation but underestimate extent of necrosis for RF ablation. CONCLUSION The visualization of coagulation necrosis from cardiac ablation is feasible using low-field high-performance CMR. Chemoablation produced a more pronounced change in lesion T1 than RF ablation, increasing SNR and CNR and thereby making it easier to visualize in both 3D navigator-gated and real-time CMR and more suitable for low-field imaging.
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Affiliation(s)
- Aravindan Kolandaivelu
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Chris G Bruce
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Rajiv Ramasawmy
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
- Biophysics and Biochemistry Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Dursun Korel Yildirim
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
- Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey
| | - Kendall J O'Brien
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - William H Schenke
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Toby Rogers
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
- Medstar Washington Hospital Center, Washington, DC, USA
| | - Adrienne E Campbell-Washburn
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
- Biophysics and Biochemistry Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Robert J Lederman
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Daniel A Herzka
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA.
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21
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Chronic Ablation Lesions on CMR: Is Black a Red Herring? JACC Cardiovasc Imaging 2020; 14:599-601. [PMID: 33248955 DOI: 10.1016/j.jcmg.2020.09.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 09/28/2020] [Indexed: 11/21/2022]
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22
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Role of Imaging in Improving Outcomes with Ablation. CURRENT TREATMENT OPTIONS IN CARDIOVASCULAR MEDICINE 2020. [DOI: 10.1007/s11936-020-00835-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Lichter J, Kholmovski EG, Coulombe N, Ghafoori E, Kamali R, MacLeod R, Ranjan R. Real-time magnetic resonance imaging-guided cryoablation of the pulmonary veins with acute freeze-zone and chronic lesion assessment. Europace 2020; 21:154-162. [PMID: 29878090 DOI: 10.1093/europace/euy089] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 04/04/2018] [Indexed: 11/13/2022] Open
Abstract
Aims The goals of this study were to develop a method that combines cryoablation with real-time magnetic resonance imaging (MRI) guidance for pulmonary vein isolation (PVI) and to further quantify the lesion formation by imaging both acute and chronic cryolesions. Methods and results Investigational MRI-compatible cryoablation devices were created by modifying cryoballoons and cryocatheters. These devices were used in canines (n = 8) and a complete series of lesions (PVI: n = 5, superior vena cava: n = 4, focal: n = 13) were made under real-time MRI guidance. Late gadolinium enhancement (LGE) magnetic resonance imaging was acquired at acute and chronic time points. Late gadolinium enhancement magnetic resonance imagings show a significant amount of acute tissue injury immediately following cryoablation which subsides over time. In the pulmonary veins, scar covered 100% of the perimeter of the ostium of the veins acutely, which subsided to 95.6 ± 4.3% after 3 months. Focal point lesions showed significantly larger acute enhancement volumes compared to the volumes estimated from gross pathology measurements (0.4392 ± 0.28 cm3 vs. 0.1657 ± 0.08 cm3, P = 0.0043). Additionally, our results with focal point ablations indicate that freeze-zone formation reached a maximum area after 120 s. Conclusion This study reports on the development of an MRI-based cryoablation system and shows that with acute cryolesions there is a large area of reversible injury. Real-time MRI provides the ability to visualize the freeze-zone formation during the freeze cycle and for focal lesions reaches a maximum after 120 s suggesting that for maximizing lesion size 120 s might be the lower limit for dosing duration.
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Affiliation(s)
- Justin Lichter
- Division of Cardiovascular Medicine, University of Utah, 30 N 1900 E Rm 4A100, Salt Lake City, UT, USA.,Department of Bioengineering, University of Utah, Salt Lake City, UT, USA.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Eugene G Kholmovski
- UCAIR, Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA.,CARMA Center, University of Utah, Salt Lake City, UT, USA
| | - Nicolas Coulombe
- Medtronic Cryopath LP, 9000 Trans-Canada Hwy, Pointe-Claire, Quebec, Canada
| | - Elyar Ghafoori
- Division of Cardiovascular Medicine, University of Utah, 30 N 1900 E Rm 4A100, Salt Lake City, UT, USA.,Department of Bioengineering, University of Utah, Salt Lake City, UT, USA.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Roya Kamali
- Division of Cardiovascular Medicine, University of Utah, 30 N 1900 E Rm 4A100, Salt Lake City, UT, USA.,Department of Bioengineering, University of Utah, Salt Lake City, UT, USA.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Rob MacLeod
- Division of Cardiovascular Medicine, University of Utah, 30 N 1900 E Rm 4A100, Salt Lake City, UT, USA.,Department of Bioengineering, University of Utah, Salt Lake City, UT, USA.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Ravi Ranjan
- Division of Cardiovascular Medicine, University of Utah, 30 N 1900 E Rm 4A100, Salt Lake City, UT, USA.,Department of Bioengineering, University of Utah, Salt Lake City, UT, USA.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
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24
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Habibi M, Chrispin J, Spragg DD, Zimmerman SL, Tandri H, Nazarian S, Halperin H, Trayanova N, Calkins H. Utility of Cardiac MRI in Atrial Fibrillation Management. Card Electrophysiol Clin 2020; 12:131-139. [PMID: 32451098 DOI: 10.1016/j.ccep.2020.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Advances in cardiac magnetic resonance (CMR) techniques and image acquisition have made it an excellent tool in the assessment of atrial myopathy. Remolding of the left atrium is the mainstay of atrial fibrillation (AF) development and its progression. CMR can detect phasic atrial volumes, atrial function, and atrial fibrosis using cine, and contrast-enhanced or non-contrast-enhanced images. These abilities make CMR a versatile and extraordinary tool in management of patients with AF including for risk stratification, ablation prognostication and planning, and assessment of stroke risk. We review the latest advancements in utility of CMR in management of patients with AF.
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Affiliation(s)
- Mohammadali Habibi
- Division of Cardiology, Section for Cardiac Electrophysiology, Johns Hopkins University, Baltimore, MD, USA
| | - Jonathan Chrispin
- Division of Cardiology, Section for Cardiac Electrophysiology, Johns Hopkins University, Baltimore, MD, USA
| | - David D Spragg
- Division of Cardiology, Section for Cardiac Electrophysiology, Johns Hopkins University, Baltimore, MD, USA
| | | | - Harikrishna Tandri
- Division of Cardiology, Section for Cardiac Electrophysiology, Johns Hopkins University, Baltimore, MD, USA
| | - Saman Nazarian
- Division of Cardiology, Section for Cardiac Electrophysiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Henry Halperin
- Division of Cardiology, Section for Cardiac Electrophysiology, Johns Hopkins University, Baltimore, MD, USA; Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Natalia Trayanova
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Hugh Calkins
- Division of Cardiology, Section for Cardiac Electrophysiology, Johns Hopkins University, Baltimore, MD, USA.
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25
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Guttman MA, Tao S, Fink S, Tunin R, Schmidt EJ, Herzka DA, Halperin HR, Kolandaivelu A. Acute enhancement of necrotic radio-frequency ablation lesions in left atrium and pulmonary vein ostia in swine model with non-contrast-enhanced T 1 -weighted MRI. Magn Reson Med 2020; 83:1368-1379. [PMID: 31565818 PMCID: PMC6949368 DOI: 10.1002/mrm.28001] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 08/21/2019] [Accepted: 08/27/2019] [Indexed: 12/20/2022]
Abstract
PURPOSE To evaluate non-contrast-enhanced MRI of acute radio-frequency ablation (RFA) lesions in the left atrium (LA) and pulmonary vein (PV) ostia. The goal is to provide a method for discrimination between necrotic (permanent) lesions and reversible injury, which is associated with recurrence after treatment of atrial fibrillation. METHODS Fifteen normal swine underwent RFA around the right-superior PV ostia. Electrical pulmonary vein isolation (PVI) was verified by electro-anatomic mapping (EAM) and pacing. MRI was carried out using a 3D respiratory-gated T1 -weighted long inversion time (TWILITE) sequence without contrast agent. Key settings were: inversion time 700 ms, triggering over 2 cardiac cycles, pixel size 1.1 mm3 . Contrast-enhanced imaging and T2 -weighted imaging were carried out for comparison. Six animals were sacrificed on ablation day for TTC-stained gross pathology, 9 animals were sacrificed after 2-3 mo after repeat EAM and MRI. Image intensity ratio (IIR) was used to measure lesion enhancement, and gross pathology was used to validate image enhancement patterns and compare lesion widths. RESULTS RFA lesions exhibited unambiguous enhancement in acute TWILITE imaging (IIR = 2.34 ± 0.49 at 1.5T), and the enhancement patterns corresponded well with gross pathology. Lesion widths in MRI correlated well with gross pathology (R2 = 0.84), with slight underestimation by 0.9 ± 0.5 mm. Lesion enhancement subsided chronically. CONCLUSION TWILITE imaging allowed acute detection of permanent RFA lesions in swine LA and PV ostia, without the need for contrast agent. Lesion enhancement pattern showed good correspondence to gross pathology and was well visualized by volume rendering. This method may provide valuable intra- or post-procedural assessment of RFA treatment.
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Affiliation(s)
- Michael A Guttman
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Susumu Tao
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Sarah Fink
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Rick Tunin
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Ehud J Schmidt
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Daniel A Herzka
- Cardiovascular Branch, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland
| | - Henry R Halperin
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Aravindan Kolandaivelu
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
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Vunnam R, Maheshwari V, Jeudy J, Ghzally Y, Imanli H, Abdulghani M, Mahat JB, Timilsina S, Restrepo A, See V, Shorofsky S, Dickfeld T. Ventricular arrhythmia ablation lesions detectability and temporal changes on cardiac magnetic resonance. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2020; 43:314-321. [DOI: 10.1111/pace.13886] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 01/09/2020] [Accepted: 02/03/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Rama Vunnam
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Varun Maheshwari
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Jean Jeudy
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Department of Diagnostic Radiology and Nuclear MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Yousra Ghzally
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Hasan Imanli
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Mohammed Abdulghani
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Jagat B. Mahat
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Saroj Timilsina
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Alejandro Restrepo
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Vincent See
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Stephen Shorofsky
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
| | - Timm Dickfeld
- Maryland Arrhythmia and Cardiology Imaging Group Baltimore Maryland
- Division of Cardiology, Department of MedicineUniversity of Maryland School of Medicine Baltimore Maryland
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Yamashita K, Kamali R, Kwan E, MacLeod RS, Dosdall DJ, Ranjan R. Effective Ablation Settings That Predict Chronic Scar After Left Atrial Ablation. JACC Clin Electrophysiol 2020; 6:143-152. [DOI: 10.1016/j.jacep.2019.10.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 10/09/2019] [Accepted: 10/10/2019] [Indexed: 12/17/2022]
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Yamashita K, Kwan E, Kamali R, Ghafoori E, Steinberg BA, MacLeod RS, Dosdall DJ, Ranjan R. Blanking period after radiofrequency ablation for atrial fibrillation guided by ablation lesion maturation based on serial MR imaging. J Cardiovasc Electrophysiol 2020; 31:450-456. [PMID: 31916637 DOI: 10.1111/jce.14340] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 12/20/2019] [Accepted: 12/26/2019] [Indexed: 01/05/2023]
Abstract
BACKGROUND Recent guidelines recommend a 3-month blanking period after atrial fibrillation (AF) ablations, which are based on clinical observation. Our goal was to quantify the timeline of the radiofrequency ablation lesion maturation using serial late gadolinium enhancement-magnetic resonance imaging (LGE-MRI) and to develop a blanking period estimate based on visible lesion maturation. METHODS Inclusion criteria targeted patients who underwent AF ablation and at least four MRI scans: at baseline before ablation, within 24 hours after (acute), between 24 hours and 90 days after (subacute), and more than 90 days after ablation (chronic). Central nonenhanced (NE) and surrounding hyperenhanced (HE) area volumes were measured and normalized to chronic lesion volume. RESULTS This study assessed 75 patients with 309 MRIs. The acute lesion was heterogeneous with a HE region surrounding a central NE region in LGE-MRI; the acute volume of the total (HE + NE) lesion was 2.62 ± 0.46 times larger than that of the chronic lesion. Acute T2-weighted imaging also showed a relatively large area of edema. Both NE and HE areas gradually receded over time and NE was not observed after 30 days. Larger initial NE volume was associated with a significantly greater chronic scar volume and this total lesion volume receded to equal the chronic lesion size at approximately 72.5 days (95% prediction interval: 57.4-92.2). CONCLUSION On the basis of serial MRI, atrial ablation lesions are often fully mature before the typical 90-day blanking period, which could support more timely clinical decision making for arrhythmia recurrence.
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Affiliation(s)
- Kennosuke Yamashita
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
- Nora Eccles Harrison, Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
| | - Eugene Kwan
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
- Nora Eccles Harrison, Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
| | - Roya Kamali
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
- Nora Eccles Harrison, Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
| | - Elyar Ghafoori
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
- Nora Eccles Harrison, Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
| | | | - Rob S MacLeod
- Nora Eccles Harrison, Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
| | - Derek J Dosdall
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
- Nora Eccles Harrison, Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
- Division of Cardiothoracic Surgery, University of Utah, Salt Lake City, Utah
| | - Ravi Ranjan
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
- Nora Eccles Harrison, Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
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29
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Yamashita K, Ghafoori E, Silvernagel J, Ashton J, J Dosdall D, MacLeod R, Ranjan R. The Effective Contact Force to Minimize Edema Relative to Chronic Lesion Formation During Radiofrequency Ablation in Ventricular Wall. Int Heart J 2019; 60:1407-1414. [PMID: 31735778 DOI: 10.1536/ihj.19-128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Radiofrequency (RF) ablation results in creation of acute edema which can lead to temporary disruption of electrical propagation.The goal of this study was to find the effective contact force (CF) to minimize edema formation in comparison to the lesion size.Ventricular RF lesions (n = 49) were created by a CF-sensing catheter in a canine model (n = 10) with varying force for 30 seconds. Animals underwent T2-weighted (T2w) and late gadolinium enhancement MRI (LGE-MRI) immediately after ablation and at 12 weeks. Acute LGE lesion volume, acute edema, and chronic LGE lesion volume were measured. Acute edema/acute LGE lesion volume ratio was used to divide the lesions into two groups.Mean edema/lesion volume ratio was 5.0 ± 2.8. The lesions were divided into greater edema group (n = 8) and smaller edema group (n = 41) based on a cutoff edema/lesion volume ratio. When comparing the two groups, the CF and force time integral (FTI) were significantly lower in the greater edema group. There was no difference in catheter power setting, tip temperature change, impedance drop, and bipolar electrogram voltage change. Acute LGE volume and chronic lesion depth were significantly smaller in the greater edema group. Moreover, receiver-operator characteristic curve for the smaller edema lesion group showed that the most discriminant cutoff values for CF and FTI were 12.4 g and 584 gs, respectively.To minimize edema size while still forming permanent lesions, ablation should be performed with FTI > 584 gs or CF > 12.4 g.
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Affiliation(s)
- Kennosuke Yamashita
- Division of Cardiovascular Medicine, University of Utah
- Nora Eccles Harrison CVRTI, University of Utah
| | - Elyar Ghafoori
- Nora Eccles Harrison CVRTI, University of Utah
- Department of Bioengineering, University of Utah
| | - Josh Silvernagel
- Nora Eccles Harrison CVRTI, University of Utah
- Department of Bioengineering, University of Utah
| | | | - Derek J Dosdall
- Nora Eccles Harrison CVRTI, University of Utah
- Department of Bioengineering, University of Utah
- Division of Cardiothoracic Surgery, University of Utah
| | - Robert MacLeod
- Nora Eccles Harrison CVRTI, University of Utah
- Department of Bioengineering, University of Utah
| | - Ravi Ranjan
- Division of Cardiovascular Medicine, University of Utah
- Nora Eccles Harrison CVRTI, University of Utah
- Department of Bioengineering, University of Utah
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30
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Okada DR, Wu KC. Applications of Cardiac MR Imaging in Electrophysiology. Magn Reson Imaging Clin N Am 2019; 27:465-473. [PMID: 31279450 DOI: 10.1016/j.mric.2019.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Mukherjee RK, Whitaker J, Williams SE, Razavi R, O'Neill MD. Magnetic resonance imaging guidance for the optimization of ventricular tachycardia ablation. Europace 2019; 20:1721-1732. [PMID: 29584897 PMCID: PMC6212773 DOI: 10.1093/europace/euy040] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 02/19/2018] [Indexed: 01/02/2023] Open
Abstract
Catheter ablation has an important role in the management of patients with ventricular tachycardia (VT) but is limited by modest long-term success rates. Magnetic resonance imaging (MRI) can provide valuable anatomic and functional information as well as potentially improve identification of target sites for ablation. A major limitation of current MRI protocols is the spatial resolution required to identify the areas of tissue responsible for VT but recent developments have led to new strategies which may improve substrate assessment. Potential ways in which detailed information gained from MRI may be utilized during electrophysiology procedures include image integration or performing a procedure under real-time MRI guidance. Image integration allows pre-procedural magnetic resonance (MR) images to be registered with electroanatomical maps to help guide VT ablation and has shown promise in preliminary studies. However, multiple errors can arise during this process due to the registration technique used, changes in ventricular geometry between the time of MRI and the ablation procedure, respiratory and cardiac motion. As isthmus sites may only be a few millimetres wide, reducing these errors may be critical to improve outcomes in VT ablation. Real-time MR-guided intervention has emerged as an alternative solution to address the limitations of pre-acquired imaging to guide ablation. There is now a growing body of literature describing the feasibility, techniques, and potential applications of real-time MR-guided electrophysiology. We review whether real-time MR-guided intervention could be applied in the setting of VT ablation and the potential challenges that need to be overcome.
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Affiliation(s)
- Rahul K Mukherjee
- School of Biomedical Engineering and Imaging Sciences, 4th Floor, North Wing, St Thomas' Hospital, King's College London, London, UK
| | - John Whitaker
- School of Biomedical Engineering and Imaging Sciences, 4th Floor, North Wing, St Thomas' Hospital, King's College London, London, UK
| | - Steven E Williams
- School of Biomedical Engineering and Imaging Sciences, 4th Floor, North Wing, St Thomas' Hospital, King's College London, London, UK.,Department of Cardiology, Guy's and St Thomas' Hospital NHS Foundation Trust, London, UK
| | - Reza Razavi
- School of Biomedical Engineering and Imaging Sciences, 4th Floor, North Wing, St Thomas' Hospital, King's College London, London, UK
| | - Mark D O'Neill
- School of Biomedical Engineering and Imaging Sciences, 4th Floor, North Wing, St Thomas' Hospital, King's College London, London, UK.,Department of Cardiology, Guy's and St Thomas' Hospital NHS Foundation Trust, London, UK
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Yamashita K, Ranjan R. Imaging for Risk Stratification in Atrial Fibrillation with Heart Failure. Cardiol Clin 2019; 37:147-156. [PMID: 30926016 PMCID: PMC6446587 DOI: 10.1016/j.ccl.2019.01.007] [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] [Indexed: 11/20/2022]
Abstract
Atrial fibrillation (AF) is the most common cardiac rhythm disorder and is associated with heart failure (HF). Cardiac imaging modalities play an important role in risk assessment and managing AF. This article reviews the use of cardiac imaging for risk assessment and to optimize treatment strategy in patients with AF and HF. First, the clinical role of echocardiography, computed tomography, and cardiac magnetic resonance for risk stratification is provided. Second, the value of imaging in catheter ablation is reviewed, including preoperative assessment, optimizing patient selection for ablation, use during the ablation procedure, and postoperative scar assessment.
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Affiliation(s)
- Kennosuke Yamashita
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Utah, 30 N 1900 E, Room 4A100, Salt Lake City, Utah 84132, USA; Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, 95 South 2000 East, Salt Lake City, UT 84112, USA
| | - Ravi Ranjan
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Utah, 30 N 1900 E, Room 4A100, Salt Lake City, Utah 84132, USA; Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, 95 South 2000 East, Salt Lake City, UT 84112, USA; Department of Biomedical Engineering, University of Utah, 36 S. Wasatch Drive, Rm. 3100, Salt Lake City, UT 84112, USA.
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Tzou WS, Hussein AA, Madhavan M, Viswanathan MN, Steinberg BA, Ceresnak SR, Davis DR, Park DS, Wang PJ, Kapa S. Year in Review in Cardiac Electrophysiology. Circ Arrhythm Electrophysiol 2019; 12:e007142. [PMID: 30744401 DOI: 10.1161/circep.118.007142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wendy S Tzou
- Department of Medicine, University of Colorado, Aurora (W.S.T.)
| | - Ayman A Hussein
- Department of Cardiovascular Medicine, Cleveland Clinic, OH (A.A.H.)
| | - Malini Madhavan
- Department of Cardiovascular Medicine, Mayo Clinic College of Medicine, Rochester, MN (M.M., S.K.)
| | - Mohan N Viswanathan
- Department of Medicine, Stanford University Medical Center, Palo Alto, CA (M.N.V., P.J.W.)
| | | | - Scott R Ceresnak
- Department of Medicine, Stanford Children's Health, Palo Alto, CA (S.R.C.)
| | - Darryl R Davis
- Division of Cardiology, University of Ottawa Heart Institute, Ontario, Canada (D.R.D.)
| | - David S Park
- Department of Medicine, New York University Langone Health, NY (D.S.P.)
| | - Paul J Wang
- Department of Medicine, Stanford University Medical Center, Palo Alto, CA (M.N.V., P.J.W.)
| | - Suraj Kapa
- Department of Cardiovascular Medicine, Mayo Clinic College of Medicine, Rochester, MN (M.M., S.K.)
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Mukherjee RK, Chubb H, Roujol S, Razavi R, O'Neill MD. Advances in Real-Time MRI-Guided Electrophysiology. CURRENT CARDIOVASCULAR IMAGING REPORTS 2019; 12:6. [PMID: 31501689 PMCID: PMC6733706 DOI: 10.1007/s12410-019-9481-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Purpose of Review Theoretical benefits of real-time MRI guidance over conventional electrophysiology include contemporaneous 3D substrate assessment and accurate intra-procedural guidance and evaluation of ablation lesions. We review the unique challenges inherent to MRI-guided electrophysiology and how to translate the potential benefits in the treatment of cardiac arrhythmias. Recent Findings Over the last 5 years, there has been substantial progress, initially in animal models and more recently in clinical studies, to establish methods and develop workflows within the MR environment that resemble those of conventional electrophysiology laboratories. Real-time MRI-guided systems have been used to perform electroanatomic mapping and ablation in patients with atrial flutter, and there is interest in developing the technology to tackle more complex arrhythmias including atrial fibrillation and ventricular tachycardia. Summary Mainstream adoption of real-time MRI-guided electrophysiology will require demonstration of clinical benefit and will be aided by increased availability of devices suitable for use in the MRI environment.
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Affiliation(s)
- Rahul K Mukherjee
- School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor, North Wing, St Thomas' Hospital, London SE1 7EH, UK
| | - Henry Chubb
- School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor, North Wing, St Thomas' Hospital, London SE1 7EH, UK
| | - Sébastien Roujol
- School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor, North Wing, St Thomas' Hospital, London SE1 7EH, UK
| | - Reza Razavi
- School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor, North Wing, St Thomas' Hospital, London SE1 7EH, UK
| | - Mark D O'Neill
- School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor, North Wing, St Thomas' Hospital, London SE1 7EH, UK.,Department of Cardiology, King's College Hospital NHS Foundation Trust, London, UK
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Yamashita K, Kholmovski E, Ghafoori E, Kamali R, Kwan E, Lichter J, MacLeod R, Dosdall DJ, Ranjan R. Characterization of edema after cryo and radiofrequency ablations based on serial magnetic resonance imaging. J Cardiovasc Electrophysiol 2018; 30:255-262. [PMID: 30375090 DOI: 10.1111/jce.13785] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 10/16/2018] [Accepted: 10/23/2018] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Radiofrequency (RF) and cryoablation are routinely used to treat arrhythmias, but the extent and time course of edema associated with the two different modalities is unknown. Our goal was to follow the lesion maturation and edema formation after RF and cryoablation using serial magnetic resonance imaging (MRI). METHODS AND RESULTS Ventricular ablation was performed in a canine model (n = 11) using a cryo or an irrigated RF catheter. T2-weighted (T2w) edema imaging and late gadolinium enhancement (LGE)-MRI were done immediately (0 day: acute), 1 to 2 weeks (subacute), and 8 to 12 weeks (chronic) after ablation. After the final MRI, excised hearts underwent pathological evaluation. As a result, 45 ventricular lesions (cryo group: 20; RF group: 25) were evaluated. Acute LGE volume was not significantly different but acute edema volume in cryo group was significantly smaller (1225.0 ± 263.5 vs 1855.2 ± 520.5 mm3 ; P = 0.01). One week after ablation, edema still existed in both group but was similar in size. Two weeks after ablation there was no edema in either of the groups. In the chronic phase, the lesion volume for cryo and RF in LGE-MRI (296.7 ± 156.4 vs 281.6 ± 140.8 mm3 ; P = 0.73); and pathology (243.3 ± 125.9 vs 214.5 ± 148.6 mm3 ; P = 0.49), as well as depth, was comparable. CONCLUSIONS When comparing cryo and RF lesions of similar chronic size, acute edema is larger for RF lesions. Edema resolves in both cryo and RF lesions in 1 to 2 weeks.
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Affiliation(s)
- Kennosuke Yamashita
- Department of Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
| | - Eugene Kholmovski
- Department of Radiology and Imaging Sciences, UCAIR, University of Utah, Salt Lake City, Utah.,CARMA Center, Department of Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
| | - Elyar Ghafoori
- Department of Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah.,Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
| | - Roya Kamali
- Department of Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah.,Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
| | - Eugene Kwan
- Department of Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah.,Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
| | - Justin Lichter
- Department of Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
| | - Robert MacLeod
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah.,Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
| | - Derek J Dosdall
- Department of Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah.,Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah.,Department of Surgery, Division of Cardiothoracic Surgery, University of Utah, Salt Lake City, Utah
| | - Ravi Ranjan
- Department of Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah.,Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah
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36
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Preoperative imaging in search of ventricular tachycardia circuit. Heart Rhythm 2018; 16:595-596. [PMID: 30445169 DOI: 10.1016/j.hrthm.2018.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Indexed: 11/24/2022]
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37
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Kholmovski EG, Silvernagel J, Angel N, Vijayakumar S, Thomas S, Dosdall D, MacLeod R, Marrouche NF, Ranjan R. Acute noncontrast T1-weighted magnetic resonance imaging predicts chronic radiofrequency ablation lesions. J Cardiovasc Electrophysiol 2018; 29:1556-1562. [PMID: 30106244 DOI: 10.1111/jce.13709] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/30/2018] [Accepted: 08/03/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND Magnetic resonance imaging (MRI) has been used to visualize radiofrequency (RF) ablation lesions but the relationship between volumes that enhance in acute MRI and the chronic lesion size is unknown. OBJECTIVES The main goal was to use noncontrast (native) T1-weighted (T1w) MRI and late gadolinium enhancement (LGE)-MRI to visualize lesions acutely and chronically and correlate the acute area of enhancement with chronic lesion size in histology. MATERIALS AND METHODS In a canine (n = 9) model RF ablation lesions were created in both ventricles. Native T1w MRI and LGE-MRI were acquired acutely after the ablation procedure. After 8 weeks, another set of RF ablations was performed, and the MRI study was repeated. Volume and depth of enhancement in native T1w MRI and LGE-MRI acquired after the initial ablation procedure were correlated with chronic lesion volume and depth in histology. RESULTS Thirty-three lesions were analyzed. Native T1w MRI visualized the acute lesions but not the chronic lesions. LGE-MRI showed both acute and chronic lesions. Acute native T1w MRI volume (average of 102.1 ± 48.5 mm3 ) and depth (4.9 ± 1.2 mm) correlated well with chronic histological volume (105.9 ± 51.8 mm3 ) and depth (4.8 ± 1.3 mm) with R2 of 0.881 (P < 0.001) and 0.874 (P < 0.001), respectively. Acute LGE-MRI had a significantly higher volume of enhancement of 499.7 ± 214.4 mm3 (P < 0.001) and depth of 7.5 ± 1.8 mm ( P < 0.001) when compared with chronic histological lesion volume and depth. CONCLUSIONS Native T1w MRI acquired acutely after RF ablation is a good predictor of chronic lesion size. Acute LGE-MRI significantly overestimates the chronic lesion size.
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Affiliation(s)
- Eugene G Kholmovski
- Division of Cardiovascular Medicine, CARMA Center, University of Utah, Salt Lake City, Utah.,Department of Radiology and Imaging Sciences, UCAIR, University of Utah, Salt Lake City, Utah
| | - Josh Silvernagel
- Department of Bioengineering, University of Utah, Salt Lake City, Utah.,Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
| | - Nathan Angel
- Department of Bioengineering, University of Utah, Salt Lake City, Utah.,Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
| | - Sathya Vijayakumar
- Division of Cardiovascular Medicine, CARMA Center, University of Utah, Salt Lake City, Utah.,Department of Radiology and Imaging Sciences, UCAIR, University of Utah, Salt Lake City, Utah
| | - Samuel Thomas
- Department of Medicine, School of Medicine, University of Utah, Salt Lake City, Utah
| | - Derek Dosdall
- Department of Bioengineering, University of Utah, Salt Lake City, Utah.,Department of Surgery, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
| | - Rob MacLeod
- Department of Bioengineering, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
| | - Nassir F Marrouche
- Division of Cardiovascular Medicine, CARMA Center, University of Utah, Salt Lake City, Utah.,Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
| | - Ravi Ranjan
- Department of Bioengineering, University of Utah, Salt Lake City, Utah.,Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah.,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
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38
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Thomas S, Silvernagel J, Angel N, Kholmovski E, Ghafoori E, Hu N, Ashton J, Dosdall DJ, MacLeod R, Ranjan R. Higher contact force during radiofrequency ablation leads to a much larger increase in edema as compared to chronic lesion size. J Cardiovasc Electrophysiol 2018; 29:1143-1149. [PMID: 29777548 PMCID: PMC6105416 DOI: 10.1111/jce.13636] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/25/2018] [Accepted: 04/27/2018] [Indexed: 01/16/2023]
Abstract
INTRODUCTION Reversible edema is a part of any radiofrequency ablation but its relationship with contact force is unknown. The goal of this study was to characterize through histology and MRI, acute and chronic ablation lesions and reversible edema with contact force. METHODS AND RESULTS In a canine model (n = 14), chronic ventricular lesions were created with a 3.5-mm tip ThermoCool SmartTouch (Biosense Webster) catheter at 25 W or 40 W for 30 seconds. Repeat ablation was performed after 3 months to create a second set of lesions (acute). Each ablation procedure was followed by in vivo T2-weighted MRI for edema and late-gadolinium enhancement (LGE) MRI for lesion characterization. For chronic lesions, the mean scar volumes at 25 W and 40 W were 77.8 ± 34.5 mm3 (n = 24) and 139.1 ± 69.7 mm3 (n = 12), respectively. The volume of chronic lesions increased (25 W: P < 0.001, 40 W: P < 0.001) with greater contact force. For acute lesions, the mean volumes of the lesion were 286.0 ± 129.8 mm3 (n = 19) and 422.1 ± 113.1 mm3 (n = 16) for 25 W and 40 W, respectively (P < 0.001 compared to chronic scar). On T2-weighted MRI, the acute edema volume was on average 5.6-8.7 times higher than the acute lesion volume and increased with contact force (25 W: P = 0.001, 40 W: P = 0.011). CONCLUSION With increasing contact force, there is a marginal increase in lesion size but accompanied with a significantly larger edema. The reversible edema that is much larger than the chronic lesion volume may explain some of the chronic procedure failures.
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Affiliation(s)
- Samuel Thomas
- Department of Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
| | - Josh Silvernagel
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, USA
| | - Nathan Angel
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, USA
| | - Eugene Kholmovski
- UCAIR, Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA
- CARMA Center, University of Utah, Salt Lake City, UT, USA
| | - Elyar Ghafoori
- Department of Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, USA
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Nan Hu
- Department of Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
| | | | - Derek J Dosdall
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, USA
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
- Division of Cardiothoracic Surgery, University of Utah,, Salt Lake City, UT, USA
| | - Rob MacLeod
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, USA
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
| | - Ravi Ranjan
- Department of Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, USA
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, USA
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Candemir B, Ozyurek E, Vurgun K, Turan N, Duzen V, Goksuluk H, Ozyuncu N, Kurklu S, Altin T, Akyurek O, Erol C. Effect of radiofrequency on epicardial myocardium after ablation of ventricular arrhythmias from within coronary sinus. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2018; 41:1060-1068. [PMID: 29935047 DOI: 10.1111/pace.13429] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 03/16/2018] [Accepted: 03/27/2018] [Indexed: 01/06/2023]
Abstract
BACKGROUND Radiofrequency (RF) ablation of idiopathic ventricular arrhythmias (IVA) from the coronary venous system (CVS) has been increasingly performed, but real effect of ablation lesions from CVS on epicardial myocardium has not been studied. OBJECTIVE To compare effects of RF delivered inside the distal CVS during ablation of IVAs originating from left ventricular summit (LVS) with IVAs ablated from right ventricular outflow tract (RVOT) using cardiac magnetic resonance imaging (CMRI). METHODS Twenty consecutive patients with IVAs who underwent acutely successful RF ablation at initial appropriate sites, i.e., distal CVS (Group 1, n = 10) or RVOT (Group 2; n = 10) were enrolled. Detailed contrast-enhanced CMRI of each patient was performed 3 months later. Presence and location of scars, distance of CVS to epicardial ventricular myocardium were measured and analyzed. RESULTS Group 1 consisted of 10 and Group 2 consisted of 10 patients. Three months after the ablation, only three patients in Group 1 had detectable late gadolinium enhancement (LGE) on CMRI while nine out of 10 patients in Group 2 had evident LGE on CMRI (P: 0.02). The mean distance of distal CVS to epicardial anterobasal myocardium was measured to be 8.8 ± 1.6 mm in Group 1. In three cases that had detectable scar on superior anterobasal LV epicardium, the mean distance was 7.4 ± 1.1 mm. CONCLUSIONS RF delivery inside the CVS is less likely to produce detectable LGE on CMRI compared to RVOT. This may partially explain less than ideal long-term results after ablation of LVS IVAs from within the great cardiac vein/anterior interventricular vein.
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Affiliation(s)
- Basar Candemir
- Cardiology Department, Ankara University, Ankara, Turkiye
| | - Elif Ozyurek
- Magnetic Resonance Imaging Division, Department of Radiology, Ankara University, Ankara, Turkiye
| | - Kutay Vurgun
- Cardiology Department, Ankara University, Ankara, Turkiye
| | - Nazli Turan
- Cardiology Department, Ankara University, Ankara, Turkiye
| | - Veysel Duzen
- Cardiology Department, Gaziantep Ersin Arslan Research Hospital, Ankara, Turkiye
| | | | - Nil Ozyuncu
- Cardiology Department, Ankara University, Ankara, Turkiye
| | - Seda Kurklu
- Cardiology Department, Ankara University, Ankara, Turkiye
| | - Timucin Altin
- Cardiology Department, Ankara University, Ankara, Turkiye
| | - Omer Akyurek
- Cardiology Department, Ankara University, Ankara, Turkiye
| | - Cetin Erol
- Cardiology Department, Ankara University, Ankara, Turkiye
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40
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Kalyanasundaram A, Fedorov VV. Lights on! Can visual light help distinguish fibrotic scars from ablation lesions? Heart Rhythm 2018; 15:576-577. [PMID: 29309840 DOI: 10.1016/j.hrthm.2018.01.003] [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: 12/23/2017] [Indexed: 11/25/2022]
Affiliation(s)
- Anuradha Kalyanasundaram
- Department of Physiology and Cell Biology, Davis Heart & Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Vadim V Fedorov
- Department of Physiology and Cell Biology, Davis Heart & Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio.
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41
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Berruezo A, Paetsch I. Inception: implanting the idea of magnetic resonance imaging-guided ventricular tachycardia substrate ablation. Europace 2017; 20:f143-f145. [DOI: 10.1093/europace/eux367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Antonio Berruezo
- Arrhythmia Section, Cardiology Department, Institut Clínic Cardiovascular, Hospital Clínic, Universitat de Barcelona, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), C/Villarroel 170, Barcelona, Spain
| | - Ingo Paetsch
- Department of Electrophysiology, HELIOS Heart Center Leipzig, University of Leipzig, Struempellstr. 39, Leipzig, Germany
- Department of Cardiology, HELIOS Heart Center Leipzig, University of Leipzig, Struempellstr. 39, Leipzig, Germany
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42
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Markman TM, Nazarian S. Cardiac Magnetic Resonance for Lesion Assessment in the Electrophysiology Laboratory. Circ Arrhythm Electrophysiol 2017; 10:CIRCEP.117.005839. [PMID: 29079665 DOI: 10.1161/circep.117.005839] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 09/29/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Timothy M Markman
- From the Division of Cardiology (T.M.M., S.N.) and Section for Cardiac Electrophysiology (S.N.), Hospital of the University of Pennsylvania, Philadelphia
| | - Saman Nazarian
- From the Division of Cardiology (T.M.M., S.N.) and Section for Cardiac Electrophysiology (S.N.), Hospital of the University of Pennsylvania, Philadelphia.
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