1
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Shen C, Chou TL, Shatz DY, Lam TV, Bai R, Su W. Pulsed field ablation of atrial tachyarrhythmia originating from atrial aeptal aneurysm. Heart Rhythm 2024:S1547-5271(24)03086-8. [PMID: 39094721 DOI: 10.1016/j.hrthm.2024.07.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2024] [Revised: 07/24/2024] [Accepted: 07/26/2024] [Indexed: 08/04/2024]
Affiliation(s)
- Caijie Shen
- Banner-University Medical Center, University of Arizona College of Medicine, Phoenix, AZ, USA; The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Tsai-Lin Chou
- Tsai-Lin Chou, Boston Scientific West Coast EP, AZ, USA
| | - Dalise Yidai Shatz
- Banner-University Medical Center, University of Arizona College of Medicine, Phoenix, AZ, USA
| | - Truc-Vy Lam
- New York University College of Arts and Science, NY, USA
| | - Rong Bai
- Banner-University Medical Center, University of Arizona College of Medicine, Phoenix, AZ, USA.
| | - Wilber Su
- Banner-University Medical Center, University of Arizona College of Medicine, Phoenix, AZ, USA
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van Hunnik A, Sobota V, Zeemering S, Opacic D, Scaf B, D’Alessandro E, Oyaert K, Kuiper M, Diness JG, Sørensen US, Milnes JT, van der Heyden MAG, Jespersen T, Schotten U, Verheule S. Analysis of drug-induced and spontaneous cardioversions reveals similar patterns leading to termination of atrial fibrillation. Front Physiol 2024; 15:1399037. [PMID: 39092426 PMCID: PMC11291310 DOI: 10.3389/fphys.2024.1399037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Accepted: 06/19/2024] [Indexed: 08/04/2024] Open
Abstract
Introduction The mechanisms leading to the conversion of atrial fibrillation (AF) to sinus rhythm are poorly understood. This study describes the dynamic behavior of electrophysiological parameters and conduction patterns leading to spontaneous and pharmacological AF termination. Methods Five independent groups of goats were investigated: (1) spontaneous termination of AF, and drug-induced terminations of AF by various potassium channel inhibitors: (2) AP14145, (3) PA-6, (4) XAF-1407, and (5) vernakalant. Bi-atrial contact mapping was performed during an open chest surgery and intervals with continuous and discrete atrial activity were determined. AF cycle length (AFCL), conduction velocity and path length were calculated for each interval, and the final conduction pattern preceding AF termination was evaluated. Results AF termination was preceded by a sudden episode of discrete activity both in the presence and absence of an antiarrhythmic drug. This episode was accompanied by substantial increases in AFCL and conduction velocity, resulting in prolongation of path length. In 77% ± 4% of all terminations the conduction pattern preceding AF termination involved medial to lateral conduction along Bachmann's bundle into both atria, followed by anterior to posterior conduction. This finding suggests conduction block in the interatrial septum and/or pulmonary vein area as final step of AF termination. Conclusion AF termination is preceded by an increased organization of fibrillatory conduction. The termination itself is a sudden process with a critical role for the interplay between spatiotemporal organization and anatomical structure.
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Affiliation(s)
- Arne van Hunnik
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
| | - Vladimír Sobota
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
- IHU-LIRYC, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Bordeaux, France
- Institute de Mathématiques de Bordeaux, University of Bordeaux, Talence, France
| | - Stef Zeemering
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
| | - Dragan Opacic
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
| | - Billy Scaf
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
| | - Elisa D’Alessandro
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
| | - Karel Oyaert
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
| | - Marion Kuiper
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
| | | | | | | | | | - Thomas Jespersen
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ulrich Schotten
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
| | - Sander Verheule
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, Netherlands
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Zhu K, Yan T, Qin C, Pan Y, Li J, Lai H, Xu D, Wang C, Hu N. Three-Dimensional Cardiomyocyte-Nanobiosensing System for Specific Recognition of Drug Subgroups. ACS Sens 2023; 8:2197-2206. [PMID: 37303111 DOI: 10.1021/acssensors.3c00070] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Abnormal cardiac electrophysiological activities significantly contribute to the incidence of cardiovascular diseases. Therefore, it is crucial to recognize effective drugs, which require an accurate, stable, and sensitive platform. Although conventional extracellular recordings offer a non-invasive and label-free manner to monitor the electrophysiological state of cardiomyocytes, the misrepresented and low-quality extracellular action potentials are difficult to provide accurate and high-content information for drug screening. This study presents the development of a three-dimensional cardiomyocyte-nanobiosensing system that can specifically recognize drug subgroups. The nanopillar-based electrode is manufactured by template synthesis and standard microfabrication technology on a porous polyethylene terephthalate membrane. Based on the cardiomyocyte-nanopillar interface, high-quality intracellular action potentials can be recorded by the minimally invasive electroporation. We validate the performance of a cardiomyocyte-nanopillar-based intracellular electrophysiological biosensing platform by two subclasses of sodium channel blockers, quinidine and lidocaine. The recorded intracellular action potentials accurately reveal the subtle differences between these drugs. Our study indicates that high-content intracellular recordings utilizing nanopillar-based biosensing can provide a promising platform for the electrophysiological and pharmacological investigation of cardiovascular diseases.
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Affiliation(s)
- Kai Zhu
- Department of Cardiac Surgery and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, Shanghai 200032, China
| | - Tao Yan
- Department of Cardiac Surgery and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, Shanghai 200032, China
| | - Chunlian Qin
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China
| | - Yuxiang Pan
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China
| | - Jun Li
- Department of Cardiac Surgery and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, Shanghai 200032, China
| | - Hao Lai
- Department of Cardiac Surgery and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, Shanghai 200032, China
| | - Dongxin Xu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Chunsheng Wang
- Department of Cardiac Surgery and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, Shanghai 200032, China
| | - Ning Hu
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
- State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Shanghai 200050, China
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4
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Miyoshi M, Abe I, Kodama N, Zhan Y, Kira S, Ishii Y, Harada T, Takano M, Takahashi M, Sato H, Tawara K, Kondo H, Fukui A, Fukuda T, Akioka H, Shinohara T, Teshima Y, Yufu K, Nakagawa M, Daa T, Shimada T, Takahashi N. Association between interatrial septum adiposity and atrial fibrillation: transesophageal echocardiography imaging and autopsy study. Sci Rep 2023; 13:9828. [PMID: 37330552 PMCID: PMC10276811 DOI: 10.1038/s41598-023-36677-1] [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: 11/29/2022] [Accepted: 06/08/2023] [Indexed: 06/19/2023] Open
Abstract
Recent clinical evidence has suggested that interatrial septal (IAS) adiposity contributes to atrial fibrillation (AF). The present study aimed to confirm the usefulness of transesophageal echocardiography (TEE) to estimate IAS adiposity in patients with AF. The histological IAS analysis based on autopsy samples sought to clarify characteristics that underlie the contribution of IAS adiposity to AF. The imaging study analyzed the TEE results in patients with AF (n = 184) in comparison with transthoracic echocardiography (TTE) and computed tomography (CT) results. The autopsy study histologically analyzed IAS in subjects with (n = 5) and without (n = 5) history of AF. In the imaging study, the ratio of interatrial septum adipose tissue (IAS-AT) volume per epicardial adipose tissue (EpAT) volume was greater in patients with persistent AF compared (PerAF) to those with paroxysmal AF (PAF). Multivariable analysis revealed that both TEE-assessed IAS thickness and TTE-assessed left atrial dimension were predicted by CT-assessed IAS-AT volume. In the autopsy study, the histologically-assessed IAS section thickness was greater in the AF group than that in the non-AF group and was positively correlated with the IAS-AT area percentage. In addition, the size of adipocytes in IAS-AT was smaller, compared to EpAT and subcutaneous adipose tissue (SAT). IAS-AT infiltrated into the IAS myocardium, as if adipose tissue split the myocardium (designated as myocardial splitting by IAS-AT). The number of island-like myocardium pieces as a result of myocardial splitting by IAS-AT was greater in the AF group than in the non-AF group and was positively correlated with the IAS-AT area percentage. The present imaging study confirmed the usefulness of TEE to estimate IAS adiposity in patients with AF without radiation exposure. The autopsy study suggested that the myocardial splitting by IAS-AT may contribute to atrial cardiomyopathy leading to AF.
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Affiliation(s)
- Miho Miyoshi
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan.
| | - Nozomi Kodama
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Yinge Zhan
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Shintaro Kira
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Yumi Ishii
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Taisuke Harada
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Masayuki Takano
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Masaki Takahashi
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Hiroki Sato
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Katsunori Tawara
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Hidekazu Kondo
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Akira Fukui
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Tomoko Fukuda
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Hidefumi Akioka
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan
| | - Mikiko Nakagawa
- Medical Education Center, Oita University Faculty of Medicine, Oita, Japan
| | - Tsutomu Daa
- Department of Diagnostic Pathology, Oita University Faculty of Medicine, Oita, Japan
| | - Tatsuo Shimada
- Oita Medical Technology School, College of Judo Therapy and Acupuncture-Moxibustion, Oita, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, 879-5593, Japan.
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Raina A, Tan NY, Fatunde OA, Asirvatham SJ, DeSimone CV. Case report: A case of perinodal atrial tachycardia and review of the relevant clinical anatomy surrounding the retroaortic node. Front Cardiovasc Med 2023; 10:1143409. [PMID: 37273874 PMCID: PMC10235778 DOI: 10.3389/fcvm.2023.1143409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 04/28/2023] [Indexed: 06/06/2023] Open
Abstract
A 70-year-old female presented with incessant supraventricular tachycardia that was refractory to metoprolol and sotalol. ECG revealed a narrow complex tachycardia with a rate of 163 beats per minute with a short RP relationship. She had salvos of atrial tachycardia which led to a severe reduction in ejection fraction as noted on echocardiography and hemodynamic instability. An electrophysiological study was performed, and findings suggested this to be an atrial tachycardia with earliest activation in the perinodal area. Radiofrequency ablation was carried out along the septum and associated structures to surround this region including the right atrium, non-coronary sinus of Valsalva, and the left atrium (anterior wall outside of the right superior pulmonary vein) to isolate this area and surround the focus with ablation lesions. The patient has done well post-procedure and continues to do well without any recurrence on low-dose flecainide at 8 months.
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Affiliation(s)
- Anvi Raina
- Department of Cardiovascular Medicine, Mayo Clinic College of Medicine, Rochester, MN, United States
| | - Nicholas Y. Tan
- Department of Cardiovascular Medicine, Mayo Clinic College of Medicine, Rochester, MN, United States
| | - Olubadewa A. Fatunde
- Department of Cardiovascular Medicine, Mayo Clinic College of Medicine, Phoenix, AZ, United States
| | - Samuel J. Asirvatham
- Department of Cardiovascular Medicine, Mayo Clinic College of Medicine, Rochester, MN, United States
| | - Christopher V. DeSimone
- Department of Cardiovascular Medicine, Mayo Clinic College of Medicine, Rochester, MN, United States
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Marazzato J, Marazzi R, Doni LA, Blasi F, Angeli F, Bagliani G, Leonelli FM, De Ponti R. Pathophysiology of Atypical Atrial Flutters. Card Electrophysiol Clin 2022; 14:411-420. [PMID: 36153123 DOI: 10.1016/j.ccep.2022.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Atypical atrial flutters are complex supraventricular arrhythmias that share different pathophysiological aspects in common. In most cases, the arrhythmogenic substrate is essentially embodied by slow-conducting areas eliciting re-entrant circuits. Although atrial scarring seems to promote slow conduction, these arrhythmias may occur even in the absence of structural heart disease. To set out the ablation strategy in this setting, three-dimensional mapping systems have proved invaluable over the last decades, helping the cardiac electrophysiologist understand the electrophysiological complexity of these circuits and easily identify critical areas amenable to effective catheter ablation.
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Affiliation(s)
- Jacopo Marazzato
- Department of Heart and Vessels, Ospedale di Circolo, Viale Borri, 57, Varese 21100, Italy; Department of Medicine and Surgery, University of Insubria, Viale Guicciardini, 9, Varese 21100, Italy
| | - Raffaella Marazzi
- Department of Heart and Vessels, Ospedale di Circolo, Viale Borri, 57, Varese 21100, Italy
| | - Lorenzo Adriano Doni
- Department of Heart and Vessels, Ospedale di Circolo, Viale Borri, 57, Varese 21100, Italy
| | - Federico Blasi
- Department of Heart and Vessels, Ospedale di Circolo, Viale Borri, 57, Varese 21100, Italy; Department of Medicine and Surgery, University of Insubria, Viale Guicciardini, 9, Varese 21100, Italy
| | - Fabio Angeli
- Department of Medicine and Surgery, University of Insubria, Viale Guicciardini, 9, Varese 21100, Italy; Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institutes, IRCCS, Via Crotto Roncaccio, 16, Tradate, Varese 21049, Italy
| | - Giuseppe Bagliani
- Cardiology and Arrhythmology Clinic, Marche Polytechnic University, University Hospital "Ospedali Riuniti Umberto I-Lancisi-Salesi", Via Conca 71, Ancona 60126, Italy
| | - Fabio M Leonelli
- Cardiology Department, James A. Haley Veterans' Hospital, University of South Florida, 13000 Bruce B Down Boulevard, Tampa, FL 33612, USA
| | - Roberto De Ponti
- Department of Heart and Vessels, Ospedale di Circolo, Viale Borri, 57, Varese 21100, Italy; Department of Medicine and Surgery, University of Insubria, Viale Guicciardini, 9, Varese 21100, Italy.
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Fixed complex electrograms during sinus rhythm and local pacing: potential ablation targets for persistent atrial fibrillation. Sci Rep 2022; 12:10697. [PMID: 35739217 PMCID: PMC9225993 DOI: 10.1038/s41598-022-14824-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 06/13/2022] [Indexed: 12/01/2022] Open
Abstract
In atrial fibrillation (AF) patients, complex electrograms during sinus rhythm (C-EGMs) could be pathological or not. We aimed to demonstrate whether local pacing was helpful to discern pathological C-EGMs. 126 persistent AF patients and 27 patients with left-side accessory pathway (LAP) underwent left atrial mapping during sinus rhythm. If C-EGMs were detected, local pacing was performed. If the electrograms turned normal, we defined them as non-fixed C-EGMs, otherwise as fixed C-EGMs. No difference was detected in the incidence and proportion of non-fixed C-EGMs between AF patients and LAP patients (101/126 vs. 19/27, P = 0.26; 9.1 ± 6.0% vs. 7.7 ± 5.7%, P = 0.28). However, the incidence and proportion of fixed C-EGMs were higher in persistent AF patients (87/126 vs. 1/27, P < 0.01; 4.3 ± 3.4% vs. 0.1 ± 0.5%, P < 0.01). Compared with non-fixed C-EGMs, fixed C-EGMs had lower amplitudes, longer electrogram durations and longer Stimuli-P wave internals. All AF patients received circumferential pulmonary vein isolation. Among AF patients with fixed C-EGMs, 45 patients received fixed C-EGMs ablation and 42 patients underwent linear ablation. Compared with linear ablation, fixed C-EGMs ablation reduced recurrence (HR: 0.43; 95% CI 0.21‐0.81; P = 0.011). Among patients without fixed C-EGMs ablation, the proportion of fixed C-EGMs was an independent predictor of ablation outcomes (HR for per percent: 1.13, 95% CI 1.01–1.28, P = 0.038). C-EGMs could be classified into fixed and non-fixed C-EGMs through local pacing. Fixed rather than non-fixed C-EGMs might indicate abnormal atrial substrates and fixed C-EGMs ablation improve outcomes of persistent AF ablation.
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De Ponti R, Marazzi R, Vilotta M, Angeli F, Marazzato J. Procedural Feasibility and Long-Term Efficacy of Catheter Ablation of Atypical Atrial Flutters in a Wide Spectrum of Heart Diseases: An Updated Clinical Overview. J Clin Med 2022; 11:jcm11123323. [PMID: 35743394 PMCID: PMC9224569 DOI: 10.3390/jcm11123323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 06/02/2022] [Accepted: 06/08/2022] [Indexed: 02/01/2023] Open
Abstract
Atypical atrial flutters (AAFL) are difficult-to-manage atrial arrhythmias, yet potentially amenable to effective radiofrequency catheter ablation (CA). However, data on CA feasibility are only sparingly reported in the literature in different clinical settings, such as AAFL related to surgical correction of congenital heart disease. The aim of this review was to provide an overview of the clinical settings in which AAFL may occur to help the cardiac electrophysiologist in the prediction of the tachycardia circuit location before CA. Moreover, the role and proper implementation of cutting-edge technologies in this setting were investigated as well as which procedural and clinical factors are associated with long-term failure to maintain sinus rhythm (SR) to find out which patients may, or may not, benefit from this procedure. Not only different surgical and non-surgical scenarios are associated with peculiar anatomical location of AAFL, but we also found that CA of AAFL is generally feasible. The success rate may be as low as 50% in surgically corrected congenital heart disease (CHD) patients but up to about 90% on average after pulmonary vein isolation (PVI) or in patients without structural heart disease. Over the years, the progressive implementation of three-dimensional mapping systems and high-density mapping tools has also proved helpful for ablation of these macro-reentrant circuits. However, the long-term maintenance of SR may still be suboptimal due to the progressive electroanatomic atrial remodeling occurring after cardiac surgery or other interventional procedures, thus limiting the likelihood of successful ablation in specific clinical settings.
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Affiliation(s)
- Roberto De Ponti
- Department of Medicine and Surgery, University of Insubria, 21100 Varese, Italy;
- Department of Heart and Vessels, Ospedale di Circolo, 21100 Varese, Italy; (R.M.); (M.V.)
- Correspondence:
| | - Raffaella Marazzi
- Department of Heart and Vessels, Ospedale di Circolo, 21100 Varese, Italy; (R.M.); (M.V.)
| | - Manola Vilotta
- Department of Heart and Vessels, Ospedale di Circolo, 21100 Varese, Italy; (R.M.); (M.V.)
| | - Fabio Angeli
- Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institute, IRCCS Tradate, 21049 Tradate, Italy;
| | - Jacopo Marazzato
- Department of Medicine and Surgery, University of Insubria, 21100 Varese, Italy;
- Department of Heart and Vessels, Ospedale di Circolo, 21100 Varese, Italy; (R.M.); (M.V.)
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Quah JX, Jenkins E, Dharmaprani D, Tiver K, Smith C, Hecker T, Joseph MX, Selvanayagam JB, Tung M, Stanton T, Ahmad W, Stoyanov N, Lahiri A, Chahadi F, Singleton C, Ganesan A. Role of interatrial conduction in atrial fibrillation. Mechanistic insights from renewal theory-based fibrillatory dynamic analysis. Heart Rhythm O2 2022; 3:335-343. [PMID: 36097465 PMCID: PMC9463713 DOI: 10.1016/j.hroo.2022.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Background Interatrial conduction has been postulated to play an important role in atrial fibrillation (AF). The pathways involved in interatrial conduction during AF remain incompletely defined. Objective We recently showed physiological assessment of fibrillatory dynamics could be performed using renewal theory, which determines rates of phase singularity formation (λf) and destruction (λd). Using the renewal approach, we aimed to understand the role of the interatrial septum and other electrically coupled regions during AF. Method RENEWAL-AF is a prospective multicenter observational study recruiting AF ablation patients (ACTRN 12619001172190). We studied unipolar electrograms obtained from 16 biatrial locations prior to ablation using a 16-electrode Advisor HD Grid catheter. Renewal rate constants λf and λd were calculated, and the relationships between these rate constants in regions of interatrial connectivity were examined. Results Forty-one AF patients (28.5% female) were recruited. A positive linear correlation was observed between λf and λd (1) across the interatrial septum (λf r2 = 0.5, P < .001, λd r2 = 0.45, P < .001), (2) in regions connected by the Bachmann bundle (right atrial appendage–left atrial appendage λf r2 = 0.29, P = .001; λd r2 = 0.2, P = .008), and (3) across the inferior interatrial routes (cavotricuspid isthmus–left atrial septum λf r2 = 0.67, P < .001; λd r2 = 0.55, P < .001). Persistent AF status and left atrial volume were found to be important effect modifiers of the degree of interatrial renewal rate statistical correlation. Conclusion Our findings support the role of interseptal statistically determined electrical disrelation in sustaining AF. Additionally, renewal theory identified preferential conduction through specific interatrial pathways during fibrillation. These findings may be of importance in identifying clinically significant targets for ablation in AF patients.
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Affiliation(s)
- Jing Xian Quah
- College of Medicine and Public Health, Flinders University of South Australia, Adelaide, Australia
- Department of Cardiovascular Medicine, Flinders Medical Centre, Adelaide, Australia
| | - Evan Jenkins
- College of Science and Engineering, Flinders University of South Australia, Adelaide, Australia
| | - Dhani Dharmaprani
- College of Medicine and Public Health, Flinders University of South Australia, Adelaide, Australia
- College of Science and Engineering, Flinders University of South Australia, Adelaide, Australia
| | - Kathryn Tiver
- Department of Cardiovascular Medicine, Flinders Medical Centre, Adelaide, Australia
| | - Corey Smith
- Department of Cardiology, Fiona Stanley Hospital, Perth, Australia
| | - Teresa Hecker
- Department of Cardiovascular Medicine, Flinders Medical Centre, Adelaide, Australia
| | - Majo X. Joseph
- Department of Cardiovascular Medicine, Flinders Medical Centre, Adelaide, Australia
| | | | - Matthew Tung
- Department of Cardiovascular Medicine, Sunshine Coast University Hospital, Birtinya, Australia
| | - Tony Stanton
- Department of Cardiovascular Medicine, Sunshine Coast University Hospital, Birtinya, Australia
- School of Medicine and Dentistry, Griffith University, Sunshine Coast University Hospital, Birtinya, Australia
| | - Waheed Ahmad
- Department of Cardiovascular Medicine, Princess Alexandra Hospital, Brisbane, Australia
| | - Nik Stoyanov
- Department of Cardiology, Fiona Stanley Hospital, Perth, Australia
| | - Anandaroop Lahiri
- Department of Cardiovascular Medicine, Flinders Medical Centre, Adelaide, Australia
| | - Fahd Chahadi
- Department of Cardiovascular Medicine, Flinders Medical Centre, Adelaide, Australia
| | - Cameron Singleton
- Department of Cardiovascular Medicine, Flinders Medical Centre, Adelaide, Australia
| | - Anand Ganesan
- College of Medicine and Public Health, Flinders University of South Australia, Adelaide, Australia
- Department of Cardiovascular Medicine, Flinders Medical Centre, Adelaide, Australia
- Address reprint requests and correspondence: Dr Anand Ganesan, College of Medicine and Public Health, Flinders University, Flinders Dr, Bedford Park SA 5042, Australia.
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10
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Implantation of Watchman FLX for Patients with Difficult Left Atrial Appendage Anatomy: A Case-Based Discussion. Curr Probl Cardiol 2022; 47:101266. [DOI: 10.1016/j.cpcardiol.2022.101266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 05/23/2022] [Indexed: 11/03/2022]
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Della Rocca DG, Tarantino N, Trivedi C, Mohanty S, Anannab A, Salwan AS, Gianni C, Bassiouny M, Al‐Ahmad A, Romero J, Briceño DF, Burkhardt JD, Gallinghouse GJ, Horton RP, Di Biase L, Natale A. Non‐pulmonary vein triggers in nonparoxysmal atrial fibrillation: Implications of pathophysiology for catheter ablation. J Cardiovasc Electrophysiol 2020; 31:2154-2167. [DOI: 10.1111/jce.14638] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 06/15/2020] [Accepted: 06/17/2020] [Indexed: 12/24/2022]
Affiliation(s)
| | - Nicola Tarantino
- Arrhythmia Services, Department of Medicine, Montefiore Medical CenterAlbert Einstein College of MedicineBronx New York
| | - Chintan Trivedi
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
| | | | - Alisara Anannab
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
- Department of Cardiovascular InterventionCentral Chest Institute of ThailandNonthaburi Thailand
| | - Anu S. Salwan
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
| | - Carola Gianni
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
| | - Mohamed Bassiouny
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
| | - Amin Al‐Ahmad
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
| | - Jorge Romero
- Arrhythmia Services, Department of Medicine, Montefiore Medical CenterAlbert Einstein College of MedicineBronx New York
| | - David F. Briceño
- Arrhythmia Services, Department of Medicine, Montefiore Medical CenterAlbert Einstein College of MedicineBronx New York
| | - J. David Burkhardt
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
| | | | - Rodney P. Horton
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
| | - Luigi Di Biase
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
- Arrhythmia Services, Department of Medicine, Montefiore Medical CenterAlbert Einstein College of MedicineBronx New York
- Department of Clinical and Experimental MedicineUniversity of FoggiaFoggia Italy
| | - Andrea Natale
- Texas Cardiac Arrhythmia InstituteSt. David's Medical CenterAustin Texas
- Interventional ElectrophysiologyScripps ClinicLa Jolla California
- Department of Cardiology, MetroHealth Medical CenterCase Western Reserve University School of MedicineCleveland Ohio
- Division of CardiologyStanford UniversityStanford California
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