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Wyatt B, McIntosh G, Campbell A, Little M, Rogers L, Wyatt B. Simulating left atrial arrhythmias with an interactive N-body model. J Electrocardiol 2024; 86:153762. [PMID: 39059214 DOI: 10.1016/j.jelectrocard.2024.153762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 05/31/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024]
Abstract
BACKGROUND Heart disease and strokes are leading global killers. While atrial arrhythmias are not deadly by themselves, they can disrupt blood flow in the heart, causing blood clots. These clots can travel to the brain, causing strokes, or to the coronary arteries, causing heart attacks. Additionally, prolonged periods of elevated heart rates can lead to structural and functional changes in the heart, ultimately leading to heart failure if untreated. The left atrium, with its more complex topology, is the primary site for complex arrhythmias. Much remains unknown about the causes of these arrhythmias, and computer modeling is employed to study them. METHODS We use N-body modeling techniques and parallel computing to build an interactive model of the left atrium. Through user input, individual muscle attributes can be adjusted, and ectopic events can be placed to induce arrhythmias in the model. Users can test ablation scenarios to determine the most effective way to eliminate these arrhythmias. RESULTS We set up muscle conditions that either spontaneously generate common arrhythmias or, with a properly timed and located ectopic event, induce an arrhythmia. These arrhythmias were successfully eliminated with simulated ablation. CONCLUSIONS We believe the model could be useful to doctors, researchers, and medical students studying left atrial arrhythmias.
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Affiliation(s)
- Bryant Wyatt
- Tarleton State University, Department of Mathematics,1333 W Washington St, Stephenville, TX 76401, United States of America.
| | - Gavin McIntosh
- Tarleton State University, Department of Mathematics,1333 W Washington St, Stephenville, TX 76401, United States of America
| | - Avery Campbell
- Oncor Electric Delivery, 1616 Woodall Rodgers Fwy, Dallas, TX 75202, United States of America
| | - Melanie Little
- MD Anderson School of Health Professions, 1515 Holocombe Blvd, Houston, TX 77030, United States of America
| | - Leah Rogers
- Tarleton State University, Department of Mathematics,1333 W Washington St, Stephenville, TX 76401, United States of America
| | - Brandon Wyatt
- Biosense Webster, 31 Technology Dr. Suite 200, Irvine, CA 92618, United States of America
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Aggarwal K, Valleru PS, Anamika FNU, Aggarwal P, Gupta I, Gupta V, Garg N, Jain R. Unraveling the Complex Relationship-Atrial Fibrillation and Pulmonary Hypertension. Curr Cardiol Rep 2024; 26:885-891. [PMID: 38985227 DOI: 10.1007/s11886-024-02089-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/26/2024] [Indexed: 07/11/2024]
Abstract
PURPOSE OF REVIEW In this article, we underscore the importance of identifying risk factors and monitoring pulmonary hypertension patients for signs of arrhythmias, as this proactive approach can reduce morbidity and mortality. RECENT FINDINGS Atrial fibrillation is the most prevalent among cardiac arrhythmias and is associated with an increased risk of stroke, morbidity, and mortality. Smoking, obesity, hypertension, a sedentary lifestyle, and diabetes mellitus are some of the modifiable risk factors for atrial fibrillation. Recent studies show that the risk of atrial fibrillation is rising in patients with parenchymal and vascular lung disease. Stretching in the atria and pulmonary veins may lead to the onset of atrial fibrillation in cardiac conditions like hypertension, heart failure, and valvular disease. Atrial fibrillation in patients with pulmonary hypertension (PH) denotes a more advanced disease. Patients with PH are more susceptible to hemodynamic stress caused by tachycardia and an uncoordinated atrioventricular contraction. Therefore, atrial arrhythmias need to be treated because inadequate control of cardiac arrhythmias may result in poor clinical outcomes and lead to disease progression in PH patients. Aside from being a sign of severe disease, AF can also speed up and exacerbate the condition.
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Affiliation(s)
| | | | - F N U Anamika
- University College of Medical Sciences, New Delhi, India
| | - Priyanka Aggarwal
- Maharishi Markandeshwar Institute of Medical Science & Research, Mullana, Haryana, India.
- , Jaipur, India.
| | - Ira Gupta
- Government Medical College, Amritsar, India
| | - Vasu Gupta
- Cleveland Clinic Akron General, Akron, OH, USA
| | - Nikita Garg
- Children's Hospital of Michigan, Detroit, USA
| | - Rohit Jain
- Penn State Health Milton S. Hershey Medical Center, Hershey, PA, USA
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3
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Gergely TG, Drobni ZD, Sayour NV, Ferdinandy P, Varga ZV. Molecular fingerprints of cardiovascular toxicities of immune checkpoint inhibitors. Basic Res Cardiol 2024:10.1007/s00395-024-01068-8. [PMID: 39023770 DOI: 10.1007/s00395-024-01068-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 07/09/2024] [Accepted: 07/10/2024] [Indexed: 07/20/2024]
Abstract
Immune checkpoint inhibitors (ICIs) have revolutionized cancer therapy by unleashing the power of the immune system against malignant cells. However, their use is associated with a spectrum of adverse effects, including cardiovascular complications, which can pose significant clinical challenges. Several mechanisms contribute to cardiovascular toxicity associated with ICIs. First, the dysregulation of immune checkpoints, such as cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) and programmed cell death protein-1 (PD-1) and its ligand (PD-L1), and molecular mimicry with cardiac autoantigens, leads to immune-related adverse events, including myocarditis and vasculitis. These events result from the aberrant activation of T cells against self-antigens within the myocardium or vascular endothelium. Second, the disruption of immune homeostasis by ICIs can lead to autoimmune-mediated inflammation of cardiac tissues, manifesting as cardiac dysfunction and heart failure, arrhythmias, or pericarditis. Furthermore, the upregulation of inflammatory cytokines, particularly tumor necrosis factor-alpha, interferon-γ, interleukin-1β, interleukin-6, and interleukin-17 contributes to cardiac and endothelial dysfunction, plaque destabilization, and thrombosis, exacerbating cardiovascular risk on the long term. Understanding the intricate mechanisms of cardiovascular side effects induced by ICIs is crucial for optimizing patient care and to ensure the safe and effective integration of immunotherapy into a broader range of cancer treatment protocols. The clinical implications of these mechanisms underscore the importance of vigilant monitoring and early detection of cardiovascular toxicity in patients receiving ICIs. Future use of these key pathological mediators as biomarkers may aid in prompt diagnosis of cardiotoxicity and will allow timely interventions.
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Affiliation(s)
- Tamás G Gergely
- Center for Pharmacology and Drug Research & Development, Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
- HCEMM-SU Cardiometabolic Immunology Research Group, Budapest, Hungary
- MTA-SE Momentum Cardio-Oncology and Cardioimmunology Research Group, Budapest, Hungary
| | - Zsófia D Drobni
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Nabil V Sayour
- Center for Pharmacology and Drug Research & Development, Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
- HCEMM-SU Cardiometabolic Immunology Research Group, Budapest, Hungary
- MTA-SE Momentum Cardio-Oncology and Cardioimmunology Research Group, Budapest, Hungary
| | - Péter Ferdinandy
- Center for Pharmacology and Drug Research & Development, Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
- Pharmahungary Group, Szeged, Hungary
| | - Zoltán V Varga
- Center for Pharmacology and Drug Research & Development, Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary.
- HCEMM-SU Cardiometabolic Immunology Research Group, Budapest, Hungary.
- MTA-SE Momentum Cardio-Oncology and Cardioimmunology Research Group, Budapest, Hungary.
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4
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Mika B, Komorowski D. Higher-Order Spectral Analysis Combined with a Convolution Neural Network for Atrial Fibrillation Detection-Preliminary Study. SENSORS (BASEL, SWITZERLAND) 2024; 24:4171. [PMID: 39000950 PMCID: PMC11243991 DOI: 10.3390/s24134171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 06/19/2024] [Accepted: 06/25/2024] [Indexed: 07/16/2024]
Abstract
The global burden of atrial fibrillation (AFIB) is constantly increasing, and its early detection is still a challenge for public health and motivates researchers to improve methods for automatic AFIB prediction and management. This work proposes higher-order spectra analysis, especially the bispectrum of electrocardiogram (ECG) signals combined with the convolution neural network (CNN) for AFIB detection. Like other biomedical signals, ECG is non-stationary, non-linear, and non-Gaussian in nature, so the spectra of higher-order cumulants, in this case, bispectra, preserve valuable features. The two-dimensional (2D) bispectrum images were applied as input for the two CNN architectures with the output AFIB vs. no-AFIB: the pre-trained modified GoogLeNet and the proposed CNN called AFIB-NET. The MIT-BIH Atrial Fibrillation Database (AFDB) was used to evaluate the performance of the proposed methodology. AFIB-NET detected atrial fibrillation with a sensitivity of 95.3%, a specificity of 93.7%, and an area under the receiver operating characteristic (ROC) of 98.3%, while for GoogLeNet results for sensitivity and specificity were equal to 96.7%, 82%, respectively, and the area under ROC was equal to 96.7%. According to preliminary studies, bispectrum images as input to 2D CNN can be successfully used for AFIB rhythm detection.
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Affiliation(s)
- Barbara Mika
- Faculty of Biomedical Engineering, Department of Medical Informatics and Artificial Intelligence, Silesian University of Technology, Roosevelt 40, 41-800 Zabrze, Poland
| | - Dariusz Komorowski
- Faculty of Biomedical Engineering, Department of Medical Informatics and Artificial Intelligence, Silesian University of Technology, Roosevelt 40, 41-800 Zabrze, Poland
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Sinigiani G, De Michieli L, Porcari A, Zocchi C, Sorella A, Mazzoni C, Bisaccia G, De Luca A, Di Bella G, Gregori D, Perfetto F, Merlo M, Sinagra G, Iliceto S, Perazzolo Marra M, Corrado D, Ricci F, Cappelli F, Cipriani A. Atrial electrofunctional predictors of incident atrial fibrillation in cardiac amyloidosis. Heart Rhythm 2024; 21:725-732. [PMID: 38309449 DOI: 10.1016/j.hrthm.2024.01.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/12/2024] [Accepted: 01/29/2024] [Indexed: 02/05/2024]
Abstract
BACKGROUND Atrial fibrillation (AF) is common in patients with cardiac amyloidosis (CA) and is a significant risk factor for heart failure hospitalization and thromboembolic events. OBJECTIVE This study was designed to investigate the atrial electrofunctional predictors of incident AF in CA. METHODS A multicenter, observational study was conducted in 4 CA referral centers including sinus rhythm patients with light-chain (AL) and transthyretin (ATTR) CA undergoing electrocardiography and cardiac magnetic resonance imaging. The primary end point was new-onset AF occurrence. RESULTS Overall, 96 patients (AL-CA, n = 40; ATTR-CA, n = 56) were enrolled. During an 18-month median follow-up (Q1-Q3, 7-29 months), 30 patients (29%) had incident AF. Compared with those without AF, patients with AF were older (79 vs 73 years; P = .001). They more frequently had ATTR (87% vs 45%; P < .001); electrocardiographic interatrial block (IAB), either partial (47% vs 21%; P = .011) or advanced (17% vs 3%; P = .017); and lower left atrial ejection fraction (LAEF; 29% vs 41%; P = .004). Age (hazard ratio [HR], 1.059; 95% CI, 1.002-1.118; P = .042), any type of IAB (HR, 2.211; 95% CI, 1.03-4.75; P = .041), and LAEF (HR, 0.967; 95% CI, 0.936-0.998; P = .044) emerged as independent predictors of incident AF. Patients exhibiting any type of IAB, LAEF <40%, and age >78 years showed a cumulative incidence for AF of 40% at 12 months. This risk was significantly higher than that carried by 1 (8.5%) or none (7.6%) of these 3 risk factors. CONCLUSION In patients with CA, older age, IAB on 12-lead electrocardiography, and reduced LAEF on cardiac magnetic resonance imaging are significant and independent predictors of incident AF. A closer screening for AF is advisable in CA patients carrying these features.
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Affiliation(s)
- Giulio Sinigiani
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Laura De Michieli
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Aldostefano Porcari
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Trieste, Italy
| | - Chiara Zocchi
- Tuscan Regional Amyloidosis Centre, Careggi University Hospital, Florence, Italy
| | - Anna Sorella
- Department of Neuroscience, Imaging and Clinical Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Carlotta Mazzoni
- Tuscan Regional Amyloidosis Centre, Careggi University Hospital, Florence, Italy
| | - Giandomenico Bisaccia
- Department of Neuroscience, Imaging and Clinical Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Antonio De Luca
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Trieste, Italy
| | - Gianluca Di Bella
- Rare Cardiac Disease Center, Cardiology Unit, University of Messina, Messina, Italy
| | - Dario Gregori
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Federico Perfetto
- Tuscan Regional Amyloidosis Centre, Careggi University Hospital, Florence, Italy
| | - Marco Merlo
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Trieste, Italy
| | - Gianfranco Sinagra
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Trieste, Italy
| | - Sabino Iliceto
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Martina Perazzolo Marra
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Domenico Corrado
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Fabrizio Ricci
- Department of Neuroscience, Imaging and Clinical Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Francesco Cappelli
- Tuscan Regional Amyloidosis Centre, Careggi University Hospital, Florence, Italy
| | - Alberto Cipriani
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy.
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Lakkireddy DR, Wilber DJ, Mittal S, Tschopp D, Ellis CR, Rasekh A, Hounshell T, Evonich R, Chandhok S, Berger RD, Horton R, Hoskins MH, Calkins H, Yakubov SJ, Simons P, Saville BR, Lee RJ. Pulmonary Vein Isolation With or Without Left Atrial Appendage Ligation in Atrial Fibrillation: The aMAZE Randomized Clinical Trial. JAMA 2024; 331:1099-1108. [PMID: 38563835 PMCID: PMC10988350 DOI: 10.1001/jama.2024.3026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 02/21/2024] [Indexed: 04/04/2024]
Abstract
Importance Left atrial appendage elimination may improve catheter ablation outcomes for atrial fibrillation. Objective To assess the safety and effectiveness of percutaneous left atrial appendage ligation adjunctive to catheter pulmonary vein isolation for nonparoxysmal atrial fibrillation. Design, Setting, and Participants This multicenter, prospective, open-label, randomized clinical trial evaluated the safety and effectiveness of percutaneous left atrial appendage ligation adjunctive to planned pulmonary vein isolation for nonparoxysmal atrial fibrillation present for less than 3 years. Eligible patients were randomized in a 2:1 ratio to undergo left atrial appendage ligation and pulmonary vein isolation or pulmonary vein isolation alone. Use of a 2:1 randomization ratio was intended to provide more device experience and safety data. Patients were enrolled from October 2015 to December 2019 at 53 US sites, with the final follow-up visit on April 21, 2021. Interventions Left atrial appendage ligation plus pulmonary vein isolation compared with pulmonary vein isolation alone. Main Outcomes and Measures A bayesian adaptive analysis was used for primary end points. Primary effectiveness was freedom from documented atrial arrythmias of greater than 30 seconds duration 12 months after undergoing pulmonary vein isolation. Rhythm was assessed by Holter monitoring at 6 and 12 months after pulmonary vein isolation, symptomatic event monitoring, or any electrocardiographic tracing obtained through 12 months after pulmonary vein isolation. Primary safety was a composite of predefined serious adverse events compared with a prespecified 10% performance goal 30 days after the procedure. Left atrial appendage closure was evaluated through 12 months after pulmonary vein isolation. Results Overall, 404 patients were randomized to undergo left atrial appendage ligation plus pulmonary vein isolation and 206 were randomized to undergo pulmonary vein isolation alone. Primary effectiveness was 64.3% with left atrial appendage ligation and pulmonary vein isolation and 59.9% with pulmonary vein isolation only (difference, 4.3% [bayesian 95% credible interval, -4.2% to 13.2%]; posterior superiority probability, 0.835), which did not meet the statistical criterion to establish superiority (0.977). Primary safety was met, with a 30-day serious adverse event rate of 3.4% (bayesian 95% credible interval, 2.0% to 5.0%; posterior probability, 1.0) which was less than the prespecified threshold of 10%. At 12 months after pulmonary vein isolation, complete left atrial appendage closure (0 mm residual communication) was observed in 84% of patients and less than or equal to 5 mm residual communication was observed in 99% of patients. Conclusions and Relevance Percutaneous left atrial appendage ligation adjunctive to pulmonary vein isolation did not meet prespecified efficacy criteria for freedom from atrial arrhythmias at 12 months compared with pulmonary vein isolation alone for patients with nonparoxysmal atrial fibrillation, but met prespecified safety criteria and demonstrated high rates of closure at 12 months. Trial Registration ClinicalTrials.gov Identifier: NCT02513797.
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Affiliation(s)
| | - David J Wilber
- Loyola University Chicago Stritch School of Medicine, Maywood, Illinois
| | | | | | | | | | | | | | - Sheetal Chandhok
- Bryn Mawr Medical Specialists Association, Bryn Mawr, Pennsylvania
| | | | | | | | | | | | | | | | - Randall J Lee
- AtriCure, Inc, Mason, Ohio
- University of California, San Francisco
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Jiang S, Qian F, Ji S, Li L, Liu Q, Zhou S, Xiao Y. Pulsed Field Ablation for Atrial Fibrillation: Mechanisms, Advantages, and Limitations. Rev Cardiovasc Med 2024; 25:138. [PMID: 39076550 PMCID: PMC11264014 DOI: 10.31083/j.rcm2504138] [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: 10/11/2023] [Revised: 11/14/2023] [Accepted: 11/28/2023] [Indexed: 07/31/2024] Open
Abstract
Pulsed field ablation with irreversible electroporation for the treatment of atrial fibrillation involves tissue-specific and non-thermal energy-induced cell necrosis, which helps avoid complications, such as pulmonary vein stenosis, atrial collateral tissue damage, and extensive atrial structural damage, often encountered with traditional thermal ablation. In existing clinical trials, pulsed field ablation has shown excellent effects on pulmonary vein isolation in patients with paroxysmal and persistent atrial fibrillation. Pulsed field ablation is easy, simple, and quick and can reduce iatrogenic injury. Therefore, the application of pulsed field ablation technology in the treatment of atrial fibrillation has a promising future. Notably, the adjustment of parameters in pulsed field ablation with different ablation catheter systems can strongly affect the area and depth of the necrotic myocardium, which greatly affects the likelihood of atrial fibrillation recurrence and incidence of adverse complications after ablation. In this paper, we review the mechanisms, advantages, and limitations of pulsed field ablation based on the results of a series of previous studies and provide ideas and directions for future research.
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Affiliation(s)
- Shali Jiang
- Department of Cardiovascular Medicine, Second Xiangya Hospital, Central South University, 410011 Changsha, Hunan, China
- Xiangya School of Medicine, Central South University, 410013 Changsha, Hunan, China
| | - Frank Qian
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Shuting Ji
- Department of Cardiovascular Medicine, Second Xiangya Hospital, Central South University, 410011 Changsha, Hunan, China
- Xiangya School of Medicine, Central South University, 410013 Changsha, Hunan, China
| | - Luohong Li
- Department of Cardiovascular Medicine, Second Xiangya Hospital, Central South University, 410011 Changsha, Hunan, China
- Xiangya School of Medicine, Central South University, 410013 Changsha, Hunan, China
| | - Qiming Liu
- Department of Cardiovascular Medicine, Second Xiangya Hospital, Central South University, 410011 Changsha, Hunan, China
| | - Shenghua Zhou
- Department of Cardiovascular Medicine, Second Xiangya Hospital, Central South University, 410011 Changsha, Hunan, China
| | - Yichao Xiao
- Department of Cardiovascular Medicine, Second Xiangya Hospital, Central South University, 410011 Changsha, Hunan, China
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Saha S, Linz D, Saha D, McEwan A, Baumert M. Overcoming Uncertainties in Electrogram-Based Atrial Fibrillation Mapping: A Review. Cardiovasc Eng Technol 2024; 15:52-64. [PMID: 37962813 DOI: 10.1007/s13239-023-00696-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023]
Abstract
In clinical rhythmology, intracardiac bipolar electrograms (EGMs) play a critical role in investigating the triggers and substrates inducing and perpetuating atrial fibrillation (AF). However, the interpretation of bipolar EGMs is ambiguous due to several aspects of electrodes, mapping algorithms and wave propagation dynamics, so it requires several variables to describe the effects of these uncertainties on EGM analysis. In this narrative review, we critically evaluate the potential impact of such uncertainties on the design of cardiac mapping tools on AF-related substrate characterization. Literature suggest uncertainties are due to several variables, including the wave propagation vector, the wave's incidence angle, inter-electrode spacing, electrode size and shape, and tissue contact. The preprocessing of the EGM signals and mapping density will impact the electro-anatomical representation and the features extracted from the local electrical activities. The superposition of multiple waves further complicates EGM interpretation. The inclusion of these uncertainties is a nontrivial problem but their consideration will yield a better interpretation of the intra-atrial dynamics in local activation patterns. From a translational perspective, this review provides a concise but complete overview of the critical variables for developing more precise cardiac mapping tools.
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Affiliation(s)
- Simanto Saha
- School of Biomedical Engineering, The University of Sydney, Sydney, NSW, 2008, Australia.
| | - Dominik Linz
- Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, SA, 5000, Australia
| | - Dyuti Saha
- Kumudini Women's Medical College, The University of Dhaka, Tangail, 1940, Dhaka, Bangladesh
| | - Alistair McEwan
- School of Biomedical Engineering, The University of Sydney, Sydney, NSW, 2008, Australia
| | - Mathias Baumert
- School of Electrical and Mechanical Engineering, The University of Adelaide, Adelaide, SA, 5000, Australia
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9
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Zhang C, Jiang S, Wang J, Wu X, Ke L. Development and validation a nomogram for predicting new-onset postoperative atrial fibrillation following pulmonary resection. BMC Surg 2024; 24:43. [PMID: 38297276 PMCID: PMC10829272 DOI: 10.1186/s12893-024-02331-4] [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: 07/22/2023] [Accepted: 01/23/2024] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND The new-onset postoperative atrial fibrillation (NOPAF) following pulmonary resection is a common clinical concern. The aim of this study was to construct a nomogram to intuitively predict the risk of NOPAF and offered protective treatments. METHODS Patients who underwent pulmonary resection between January 2018 and December 2020 were consecutively enrolled. Forward stepwise multivariable logistic regression analyses were used to screen independent predictors, and a derived nomogram model was built. The model performance was evaluated in terms of calibration, discrimination and clinical utility and validated with bootstrap resampling. RESULTS A total of 3583 patients who met the research criteria were recruited for this study. The incidence of NOPAF was 1.507% (54/3583). A nomogram, composed of five independent predictors, namely age, admission heart rate, extent of resection, laterality, percent maximum ventilation volume per minute (%MVV), was constructed. The concordance index (C-index) was 0.811. The nomogram showed substantial discriminative ability, with an area under the receiver operating characteristic curve of 0.811 (95% CI 0.758-0.864). Moreover, the model shows prominent calibration performance and higher net clinical benefits. CONCLUSION We developed a novel nomogram that can predict the risk of NOPAF following pulmonary resection, which may assist clinicians predict the individual probability of NOPAF and perform available prophylaxis. By using bootstrap resampling for validation, the optimal discrimination and calibration were demonstrated, indicating that the nomogram may have clinical practicality.
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Affiliation(s)
- Chuankai Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of USTC, Hefei, China.
- Department of Thoracic Surgery, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Anhui, Hefei, 230001, China.
| | - Songsong Jiang
- Department of Cardiology, The Affiliated Anhui Provincial Hospital of Anhui Medical University, Hefei, China
| | - Jun Wang
- Department of Thoracic Surgery, The First Affiliated Hospital of USTC, Hefei, China
- Department of Thoracic Surgery, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Anhui, Hefei, 230001, China
| | - Xianning Wu
- Department of Thoracic Surgery, The First Affiliated Hospital of USTC, Hefei, China
- Department of Thoracic Surgery, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Anhui, Hefei, 230001, China
| | - Li Ke
- Department of Thoracic Surgery, The First Affiliated Hospital of USTC, Hefei, China
- Department of Thoracic Surgery, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Anhui, Hefei, 230001, China
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10
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Pommier T, Lafont A, Didier R, Garnier L, Duloquin G, Meloux A, Sagnard A, Graber M, Dogon G, Laurent G, Vergely C, Béjot Y, Guenancia C. Factors associated with patent foramen ovale-related stroke: SAFAS study. Rev Neurol (Paris) 2024; 180:33-41. [PMID: 37777437 DOI: 10.1016/j.neurol.2023.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 05/08/2023] [Accepted: 05/22/2023] [Indexed: 10/02/2023]
Abstract
BACKGROUND Persistent foramen ovale (PFO) contributes to cryptogenic stroke and is associated with stroke recurrence, although the exact mechanism of ischemic events is not fully understood. Several biomarkers have been developed for the prediction of atrial fibrillation after stroke, but there are currently only limited data on their potential value for the diagnosis of PFO-related stroke. METHODS This study was a prospective single-center study that included all patients hospitalized between March 31, 2018, and January 18, 2020, in the stroke department of the Dijon University Hospital for ischemic stroke without obvious cause and without a history of atrial fibrillation. PFO was systematically screened by transthoracic echocardiography and images were reviewed by an independent cardiologist blinded from clinical data. PFO was defined according to the CLOSE trial criteria: PFO associated with interatrial septal aneurysm or significant interatrial shunt (> 30 microbubbles in the left atrium within three cardiac cycles after right atrial opacification). The potential association of PFO-related stroke with biomarkers of cardiac fibrosis and inflammation such as galectin-3, GDF-15, ST-2, osteoprotegerin and NT-proBNP was tested using multivariate backward stepwise logistic regression. RESULTS Of the 240 patients included in the SAFAS study, 229 had complete echocardiographic data, and 23 (10%) had PFO-related stroke. Patients with PFO-related stroke were significantly younger (58±14 vs. 69±14, P<0.001), had less frequent previous arterial hypertension (30 vs. 60%, P=0.008), and more frequent cerebellar territory involvement (26 vs. 9%, P=0.014) compared to the other patients. In addition, they had less frequently left atrial dilatation (left atrial index volume>34mL/m2 [9 vs. 35%, P=0.009]). After ROC curve analysis for definition of thresholds, PFO-related stroke patients more often had galectin-3<9.5ng/mL (59 vs. 27%, P=0.002), ST2<13380pg/ml (23 vs. 50%, P=0.007), GDF-15<1200ng/mL (59 vs. 27%, P=0.002), osteoprotegerin<1133pg/mL (82 vs. 58%, P=0.033) and NT-proBNP<300pg/mL (88 vs. 55%, P=0.009). After multivariate analysis, only galectin-3<9.5ng/mL (OR [95% CI] 3.4 [1.18; 9.8], P=0.024) and osteoprotegerin<1133pg/L (OR [95% CI] 5.0 [1.1; 22.9], P=0.038) were independently associated with PFO-related stroke. CONCLUSION Patients in whom cryptogenic stroke is attributed to a significant PFO have a specific clinical and biological phenotype. Low levels of galectin-3 and osteoprotegerin may help identify patients with PFO-related strokes.
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Affiliation(s)
- T Pommier
- Cardiology Department, University Hospital, 14, rue Paul-Gaffarel, 21079 Dijon cedex, France; Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France
| | - A Lafont
- Cardiology Department, University Hospital, 14, rue Paul-Gaffarel, 21079 Dijon cedex, France
| | - R Didier
- Cardiology Department, University Hospital, 14, rue Paul-Gaffarel, 21079 Dijon cedex, France; Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France
| | - L Garnier
- Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France; Neurology Department, University Hospital, Dijon, France
| | - G Duloquin
- Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France; Neurology Department, University Hospital, Dijon, France
| | - A Meloux
- Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France
| | - A Sagnard
- Cardiology Department, University Hospital, 14, rue Paul-Gaffarel, 21079 Dijon cedex, France
| | - M Graber
- Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France; Neurology Department, University Hospital, Dijon, France
| | - G Dogon
- Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France
| | - G Laurent
- Cardiology Department, University Hospital, 14, rue Paul-Gaffarel, 21079 Dijon cedex, France; Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France
| | - C Vergely
- Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France
| | - Y Béjot
- Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France; Neurology Department, University Hospital, Dijon, France
| | - C Guenancia
- Cardiology Department, University Hospital, 14, rue Paul-Gaffarel, 21079 Dijon cedex, France; Pathophysiology and Epidemiology of Cerebro-Cardiovascular diseases (EA 7460), Faculty of Health Sciences, université de Bourgogne, université de Bourgogne Franche-Comté, Dijon, France.
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11
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Ramos-Mondragón R, Lozhkin A, Vendrov AE, Runge MS, Isom LL, Madamanchi NR. NADPH Oxidases and Oxidative Stress in the Pathogenesis of Atrial Fibrillation. Antioxidants (Basel) 2023; 12:1833. [PMID: 37891912 PMCID: PMC10604902 DOI: 10.3390/antiox12101833] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/26/2023] [Accepted: 09/29/2023] [Indexed: 10/29/2023] Open
Abstract
Atrial fibrillation (AF) is the most common type of cardiac arrhythmia and its prevalence increases with age. The irregular and rapid contraction of the atria can lead to ineffective blood pumping, local blood stasis, blood clots, ischemic stroke, and heart failure. NADPH oxidases (NOX) and mitochondria are the main sources of reactive oxygen species in the heart, and dysregulated activation of NOX and mitochondrial dysfunction are associated with AF pathogenesis. NOX- and mitochondria-derived oxidative stress contribute to the onset of paroxysmal AF by inducing electrophysiological changes in atrial myocytes and structural remodeling in the atria. Because high atrial activity causes cardiac myocytes to expend extremely high energy to maintain excitation-contraction coupling during persistent AF, mitochondria, the primary energy source, undergo metabolic stress, affecting their morphology, Ca2+ handling, and ATP generation. In this review, we discuss the role of oxidative stress in activating AF-triggered activities, regulating intracellular Ca2+ handling, and functional and anatomical reentry mechanisms, all of which are associated with AF initiation, perpetuation, and progression. Changes in the extracellular matrix, inflammation, ion channel expression and function, myofibril structure, and mitochondrial function occur during the early transitional stages of AF, opening a window of opportunity to target NOX and mitochondria-derived oxidative stress using isoform-specific NOX inhibitors and mitochondrial ROS scavengers, as well as drugs that improve mitochondrial dynamics and metabolism to treat persistent AF and its transition to permanent AF.
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Affiliation(s)
- Roberto Ramos-Mondragón
- Department of Pharmacology, University of Michigan, 1150 West Medical Center Drive, 2301 Medical Science Research Building III, Ann Arbor, MI 48109, USA; (R.R.-M.); (L.L.I.)
| | - Andrey Lozhkin
- Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48019, USA; (A.L.); (A.E.V.); (M.S.R.)
| | - Aleksandr E. Vendrov
- Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48019, USA; (A.L.); (A.E.V.); (M.S.R.)
| | - Marschall S. Runge
- Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48019, USA; (A.L.); (A.E.V.); (M.S.R.)
| | - Lori L. Isom
- Department of Pharmacology, University of Michigan, 1150 West Medical Center Drive, 2301 Medical Science Research Building III, Ann Arbor, MI 48109, USA; (R.R.-M.); (L.L.I.)
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Nageswara R. Madamanchi
- Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48019, USA; (A.L.); (A.E.V.); (M.S.R.)
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12
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Qi D, Zhang J. Relationship between anatomical characteristics of pulmonary veins and atrial fibrillation recurrence after radiofrequency catheter ablation: a systematic review and meta-analysis. Front Cardiovasc Med 2023; 10:1235433. [PMID: 37795484 PMCID: PMC10546190 DOI: 10.3389/fcvm.2023.1235433] [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: 06/06/2023] [Accepted: 09/04/2023] [Indexed: 10/06/2023] Open
Abstract
Background The aim of the current study was to investigate the potential relationship between anatomical characteristics of pulmonary veins (PVs) and atrial fibrillation recurrence (AFR) following radiofrequency catheter ablation (RFCA), specifically focusing on PV diameter and cross-sectional orifices index (CSOA). The analysis was based on a comprehensive review of currently available literature, providing valuable insights for the prevention and treatment of AFR. Methods Data was collected from five databases, including PubMed, MEDLINE, EMBASE, and Cochrane, spanning the period from 2004 to October 2022. The search strategy utilized Medical Subject Headings (MeSH) terms related to PV diameter, PV size, PV anatomy, and AFR. Indicators of PV diameter and CSOA from the included studies were collected and analyzed, with Weight mean difference (WMD) and 95% confidence intervals (CIs) representing continuous variables. Results The meta-analysis included six studies. The results revealed that patients with AFR had a significant larger mean PV diameter compared to those without AFR (MD 0.33; 95% CI: 0.01, 0.66; P = 0.04; I2 = 33.80%). In a meta-analysis of two studies involving a total of 715 participants, we compared the diameters of the left superior pulmonary vein (LSPV), left inferior pulmonary vein (LIPV), right superior pulmonary vein (RSPV), right inferior pulmonary vein (RIPV) between patients with AFR and patients without AFR. The results showed that there were no statistically significant differences between the two groups in any of the four data items (all P > 0.05). Additionally, the pooled estimate revealed that LSPV-CSOA, LIPV-COSA, RSPV-COSA, and RIPV-CSOA were greater in the AFR group compared to the non-AFR group, but the differences were not statistically significant (all P > 0.05). Conclusion We found evidence supporting the notion that the PV diameter of patients who experienced AFR after RFCA was significantly larger than that of patients without AFR. The findings suggested that the PV diameter could serve as a potential predictor of the risk of AFR following RFCA.
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Affiliation(s)
| | - Jianjun Zhang
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
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13
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Cofiño-Fabres C, Passier R, Schwach V. Towards Improved Human In Vitro Models for Cardiac Arrhythmia: Disease Mechanisms, Treatment, and Models of Atrial Fibrillation. Biomedicines 2023; 11:2355. [PMID: 37760796 PMCID: PMC10525681 DOI: 10.3390/biomedicines11092355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 09/29/2023] Open
Abstract
Heart rhythm disorders, arrhythmias, place a huge economic burden on society and have a large impact on the quality of life of a vast number of people. Arrhythmias can have genetic causes but primarily arise from heart tissue remodeling during aging or heart disease. As current therapies do not address the causes of arrhythmias but only manage the symptoms, it is of paramount importance to generate innovative test models and platforms for gaining knowledge about the underlying disease mechanisms which are compatible with drug screening. In this review, we outline the most important features of atrial fibrillation (AFib), the most common cardiac arrhythmia. We will discuss the epidemiology, risk factors, underlying causes, and present therapies of AFib, as well as the shortcomings and opportunities of current models for cardiac arrhythmia, including animal models, in silico and in vitro models utilizing human pluripotent stem cell (hPSC)-derived cardiomyocytes.
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Affiliation(s)
- Carla Cofiño-Fabres
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Drienerlolaan 5, 7500 AE Enschede, The Netherlands;
| | - Robert Passier
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Drienerlolaan 5, 7500 AE Enschede, The Netherlands;
- Department of Anatomy and Embryology, Leiden University Medical Centre, 2300 RC Leiden, The Netherlands
| | - Verena Schwach
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Drienerlolaan 5, 7500 AE Enschede, The Netherlands;
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14
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Parra-Lucares A, Villa E, Romero-Hernández E, Méndez-Valdés G, Retamal C, Vizcarra G, Henríquez I, Maldonado-Morales EAJ, Grant-Palza JH, Ruíz-Tagle S, Estrada-Bobadilla V, Toro L. Tic-Tac: A Translational Approach in Mechanisms Associated with Irregular Heartbeat and Sinus Rhythm Restoration in Atrial Fibrillation Patients. Int J Mol Sci 2023; 24:12859. [PMID: 37629037 PMCID: PMC10454641 DOI: 10.3390/ijms241612859] [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: 06/01/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Atrial fibrillation (AF) is a prevalent cardiac condition predominantly affecting older adults, characterized by irregular heartbeat rhythm. The condition often leads to significant disability and increased mortality rates. Traditionally, two therapeutic strategies have been employed for its treatment: heart rate control and rhythm control. Recent clinical studies have emphasized the critical role of early restoration of sinus rhythm in improving patient outcomes. The persistence of the irregular rhythm allows for the progression and structural remodeling of the atria, eventually leading to irreversible stages, as observed clinically when AF becomes permanent. Cardioversion to sinus rhythm alters this progression pattern through mechanisms that are still being studied. In this review, we provide an in-depth analysis of the pathophysiological mechanisms responsible for maintaining AF and how they are modified during sinus rhythm restoration using existing therapeutic strategies at different stages of clinical investigation. Moreover, we explore potential future therapeutic approaches, including the promising prospect of gene therapy.
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Affiliation(s)
- Alfredo Parra-Lucares
- Critical Care Unit, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago 8380420, Chile
- Cardiovascular Department, Hospital Clínico Universidad de Chile, Santiago 8380420, Chile
| | - Eduardo Villa
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago 8380420, Chile
| | | | - Gabriel Méndez-Valdés
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago 8380420, Chile
| | - Catalina Retamal
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago 8380420, Chile
| | - Geovana Vizcarra
- Division of Internal Medicine, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago 8380420, Chile
| | - Ignacio Henríquez
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago 8380420, Chile
| | | | - Juan H. Grant-Palza
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago 8380420, Chile
| | - Sofía Ruíz-Tagle
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago 8380420, Chile
| | | | - Luis Toro
- Division of Nephrology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago 8380420, Chile
- Centro de Investigación Clínica Avanzada, Hospital Clínico, Universidad de Chile, Santiago 8380420, Chile
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15
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Reynaldo G, Hamonangan R, Naomi P, Widjanarko ND. High-Dose Oral Amiodarone for Cardioversion of Atrial Fibrillation: A Case Report. Cureus 2023; 15:e41766. [PMID: 37575716 PMCID: PMC10416672 DOI: 10.7759/cureus.41766] [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] [Accepted: 07/12/2023] [Indexed: 08/15/2023] Open
Abstract
With the rising prevalence of atrial fibrillation (AF), it has become a global health problem with increasing complications and high medical costs. Here, we describe the case of a 52-year-old woman with chest discomfort and frequent palpitations for the last few months. A careful clinical and instrumental examination showed that the patient had AF. Sinus rhythm was restored by cardioversion using high-dose oral amiodarone therapy. Although this medication can be an alternative with several advantages over electrical cardioversion in the future, further studies are needed to establish its efficacy and safety profile.
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Affiliation(s)
| | | | - Pingkan Naomi
- General Practice, Atma Jaya Catholic University, Jakarta, IDN
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16
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Burg MR, Anderson RD, Chandra Srinath Patloori S, Acosta-Vélez G, Spears D, Ha ACT, Chauhan VS, Bhaskaran AP, Nair K, Cusimano RJ, Nanthakumar K. Reinventing Larrey's approach for epicardial mapping: The closed pericardiostomy technique. Heart Rhythm 2023; 20:1055-1060. [PMID: 37088232 DOI: 10.1016/j.hrthm.2023.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/14/2023] [Accepted: 04/17/2023] [Indexed: 04/25/2023]
Affiliation(s)
- Melanie R Burg
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Robert D Anderson
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Sirish Chandra Srinath Patloori
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Gabriel Acosta-Vélez
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Danna Spears
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Andrew C T Ha
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Vijay S Chauhan
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Abhishek P Bhaskaran
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Krishnakumar Nair
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Robert J Cusimano
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
| | - Kumaraswamy Nanthakumar
- Hull Family Cardiac Fibrillation Management Laboratory, Division of Cardiology, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada.
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17
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Oancea AF, Jigoranu RA, Morariu PC, Miftode RS, Trandabat BA, Iov DE, Cojocaru E, Costache II, Baroi LG, Timofte DV, Tanase DM, Floria M. Atrial Fibrillation and Chronic Coronary Ischemia: A Challenging Vicious Circle. Life (Basel) 2023; 13:1370. [PMID: 37374152 DOI: 10.3390/life13061370] [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: 04/12/2023] [Revised: 05/31/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Atrial fibrillation, the most frequent arrhythmia in clinical practice and chronic coronary syndrome, is one of the forms of coronary ischemia to have a strong dual relationship. Atrial fibrillation may accelerate atherosclerosis and may increase oxygen consumption in the myocardium, creating a mismatch between supply and demand, thus promoting the development or worsening of coronary ischemia. Chronic coronary syndrome alters the structure and function of gap junction proteins, affecting the conduction of action potential and leading to ischemic necrosis of cardiomyocytes and their replacement with fibrous tissue, in this way sustaining the focal ectopic activity in atrial myocardium. They have many risk factors in common, such as hypertension, obesity, type 2 diabetes mellitus, and dyslipidemia. It is vital for the prognosis of patients to break this vicious circle by controlling risk factors, drug therapies, of which antithrombotic therapy may sometimes be challenging in terms of prothrombotic and bleeding risk, and interventional therapies (revascularization and catheter ablation).
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Affiliation(s)
- Alexandru Florinel Oancea
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Cardiology Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Raul Alexandru Jigoranu
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Cardiology Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Paula Cristina Morariu
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Internal Medicine Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Radu-Stefan Miftode
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Cardiology Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Bogdan Andrei Trandabat
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Cardiology Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Diana Elena Iov
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Internal Medicine Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Elena Cojocaru
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Department of Morphofunctional Sciences-Pathology, Pediatric Hospital, 700115 Iasi, Romania
| | - Irina Iuliana Costache
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Cardiology Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Livia Genoveva Baroi
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Surgery Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Daniel Vasile Timofte
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Surgery Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Daniela Maria Tanase
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Internal Medicine Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
| | - Mariana Floria
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy Grigore T. Popa, 700115 Iasi, Romania
- Internal Medicine Clinic, St. Spiridon Emergency Hospital, 700115 Iasi, Romania
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18
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Masenga SK, Kirabo A. Hypertensive heart disease: risk factors, complications and mechanisms. Front Cardiovasc Med 2023; 10:1205475. [PMID: 37342440 PMCID: PMC10277698 DOI: 10.3389/fcvm.2023.1205475] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 05/26/2023] [Indexed: 06/22/2023] Open
Abstract
Hypertensive heart disease constitutes functional and structural dysfunction and pathogenesis occurring primarily in the left ventricle, the left atrium and the coronary arteries due to chronic uncontrolled hypertension. Hypertensive heart disease is underreported and the mechanisms underlying its correlates and complications are not well elaborated. In this review, we summarize the current understanding of hypertensive heart disease, we discuss in detail the mechanisms associated with development and complications of hypertensive heart disease especially left ventricular hypertrophy, atrial fibrillation, heart failure and coronary artery disease. We also briefly highlight the role of dietary salt, immunity and genetic predisposition in hypertensive heart disease pathogenesis.
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Affiliation(s)
- Sepiso K. Masenga
- HAND Research Group, School of Medicine and Health Sciences, Mulungushi University, Livingstone Cam-Pus, Livingstone, Zambia
- School of Medicine, University of Zambia, Lusaka, Zambia
- Department of Medicine, Vanderbilt University Medical Centre, Nashville, TN, United States
| | - Annet Kirabo
- Department of Medicine, Vanderbilt University Medical Centre, Nashville, TN, United States
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19
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Haines DE, Kong MH, Ruppersberg P, Haeusser P, Avitall B, Szili-Torok T, Verma A. Electrographic flow mapping for atrial fibrillation: theoretical basis and preliminary observations. J Interv Card Electrophysiol 2023; 66:1015-1028. [PMID: 35969338 PMCID: PMC10172240 DOI: 10.1007/s10840-022-01308-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 07/15/2022] [Indexed: 10/15/2022]
Abstract
Ablation strategies remain poorly defined for persistent atrial fibrillation (AF) patients with recurrence despite intact pulmonary vein isolation (PVI). As the ability to perform durable PVI improves, the need for advanced mapping to identify extra-PV sources of AF becomes increasingly evident. Multiple mapping technologies attempt to localize these self-sustained triggers and/or drivers responsible for initiating and/or maintaining AF; however, current approaches suffer from technical limitations. Electrographic flow (EGF) mapping is a novel mapping method based on well-established principles of optical flow and fluid dynamics. It enables the full spatiotemporal reconstruction of organized wavefront propagation within the otherwise chaotic and disorganized electrical conduction of AF. Given the novelty of EGF mapping and relative unfamiliarity of most clinical electrophysiologists with the mathematical principles powering the EGF algorithm, this paper provides an in-depth explanation of the technical/mathematical foundations of EGF mapping and demonstrates clinical applications of EGF mapping data and analyses. Starting with a 64-electrode basket catheter, unipolar EGMs are recorded and processed using an algorithm to visualize the electrographic flow and highlight the location of high prevalence AF "source" activity. The AF sources are agnostic to the specific mechanisms of source signal generation.
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Affiliation(s)
- David E Haines
- Department of Cardiovascular Medicine, Beaumont Hospital, Oakland University William Beaumont School of Medicine, 3601 West 13 Mile Rd., Royal Oaks, MI, 48973, USA.
| | | | | | | | - Boaz Avitall
- Department of Medicine and Bioengineering, University of Illinois, Chicago, IL, USA
| | - Tamas Szili-Torok
- Department of Cardiology, Electrophysiology, Erasmus Medical Center, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Atul Verma
- Southlake Regional Health Centre, Division of Cardiology, University of Toronto, 602-581 Davis Drive, Newmarket, Ontario, L3Y 2P6, Canada.
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Huang Y, Tan Y, Yao Y, Gu L, Huang L, Song T. Genome-wide detection of m6A-associated SNPs in atrial fibrillation pathogenesis. Front Cardiovasc Med 2023; 10:1152851. [PMID: 37304952 PMCID: PMC10250744 DOI: 10.3389/fcvm.2023.1152851] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 05/10/2023] [Indexed: 06/13/2023] Open
Abstract
Objective N6-Methyladenosine (m6A) modification is of great importance in both the pathological conditions and physiological process. The m6A single nucleotide polymorphisms (SNPs) are associated with cardiovascular diseases including coronary artery disease, heart failure. However, it is unclear whether m6A-SNPs are involved in atrial fibrillation (AF). Here, we aimed to explore the relationship between m6A-SNPs and AF. Method The relationship between m6A-SNPs and AF was evaluated by analyzing the AF genome-wide association study (GWAS) and m6A-SNPs annotated by the m6AVar database. Further, eQTL and gene differential expression analysis were performed to confirm the association between these identified m6A-SNPs and their target genes in the development of AF. Moreover, we did the GO enrichment analysis to figure out the potential functions of these m6A-SNPs affected genes. Result Totally, 105 m6A-SNPs were identified to be significantly associated with AF (FDR < 0.05), among which 7 showed significant eQTL signals on local genes in the atrial appendage. By using four public AF gene expression datasets, we identified genes SYNE2, USP36, and THAP9 containing SNPs rs35648226, rs900349, and rs1047564 were differentially expressed in AF population. Further, SNPs rs35648226 and rs1047564 are potentially associated with AF by affecting m6A modification and both of them might have an interaction with RNA-binding protein, PABPC1. Conclusion In summary, we identified m6A-SNPs associated with AF. Our study provided new insights into AF development as well as AF therapeutic target.
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Affiliation(s)
- Yan Huang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Yuqian Tan
- Department of Health Toxicology, Key Laboratory for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuan Yao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Linglong Gu
- Department of Health Toxicology, Key Laboratory for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liusong Huang
- College of Software Engineering, Maanshan Teacher's College, Maanshan, China
| | - Tao Song
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
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21
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Fialho GL, Nearing BD, Waks JW, Maher TR, Clarke JR, Shepherd A, D'Avila A, Verrier RL. Reduction in atrial and ventricular electrical heterogeneity following pulmonary vein isolation in patients with atrial fibrillation. J Interv Card Electrophysiol 2023:10.1007/s10840-023-01543-7. [PMID: 37074510 DOI: 10.1007/s10840-023-01543-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 03/28/2023] [Indexed: 04/20/2023]
Abstract
BACKGROUND Pulmonary vein isolation (PVI) modulates the intrinsic cardiac autonomic nervous system and reduces atrial fibrillation (AF) recurrence. METHODS In this retrospective analysis, we investigated the impact of PVI on ECG interlead P-wave, R-wave, and T-wave heterogeneity (PWH, RWH, TWH) in 45 patients in sinus rhythm undergoing clinically indicated PVI for AF. We measured PWH as a marker of atrial electrical dispersion and AF susceptibility and RWH and TWH as markers of ventricular arrhythmia risk along with standard ECG measures. RESULTS PVI acutely (16 ± 8.9 h) reduced PWH by 20.7% (from 31 ± 1.9 to 25 ± 1.6 µV, p < 0.001) and TWH by 27% (from 111 ± 7.8 to 81 ± 6.5 µV, p < 0.001). RWH was unchanged after PVI (p = 0.068). In a subgroup of 20 patients with longer follow-up (mean = 47 ± 3.7 days after PVI), PWH remained low (25 ± 1.7 µV, p = 0.01), but TWH partially returned to the pre-ablation level (to 93 ± 10.2, p = 0.16). In three individuals with early recurrence of atrial arrhythmia in the first 3 months after ablation, PWH increased acutely by 8.5%, while in patients without early recurrence, PWH decreased acutely by 22.3% (p = 0.048). PWH was superior to other contemporary P-wave metrics including P-wave axis, dispersion, and duration in predicting early AF recurrence. CONCLUSION The rapid time course of decreased PWH and TWH after PVI suggests a beneficial influence likely mediated via ablation of the intrinsic cardiac nervous system. Acute responses of PWH and TWH to PVI suggest a favorable dual effect on atrial and ventricular electrical stability and could be used to track individual patients' electrical heterogeneity profile.
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Affiliation(s)
- Guilherme L Fialho
- Federal University of Santa Catarina, Florianopolis, Brazil
- Departments of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA
| | - Bruce D Nearing
- Departments of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA
| | - Jonathan W Waks
- Departments of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA
| | - Timothy R Maher
- Departments of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA
| | - John-Ross Clarke
- Departments of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA
| | - Alyssa Shepherd
- Departments of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA
| | - Andre D'Avila
- Departments of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA
| | - Richard L Verrier
- Departments of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA.
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Diallo EH, Brouillard P, Raymond JM, Liberman M, Duceppe E, Potter BJ. Predictors and impact of postoperative atrial fibrillation following thoracic surgery: a state-of-the-art review. Anaesthesia 2023; 78:491-500. [PMID: 36632006 DOI: 10.1111/anae.15957] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2022] [Indexed: 01/13/2023]
Abstract
This review of 19 studies (39,783 patients) of atrial fibrillation after thoracic surgery addresses the pathophysiology, incidence, and consequences of atrial fibrillation in this population, as well as its prevention and management. Interestingly, atrial fibrillation was most often identified in patients not previously known to have the disease. Rhythm control with amiodarone was the most commonly used treatment and nearly all patients were discharged in sinus rhythm. Major predictors were age; male sex; history of atrial fibrillation; congestive heart failure; left atrial enlargement; elevated brain natriuretic peptide level; and the invasiveness of procedures. Overall, patients with atrial fibrillation stayed 3 days longer in hospital. We also discuss the importance of standardising research on this subject and provide recommendations that might mitigate the impact postoperative atrial fibrillation on hospital resources.
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Affiliation(s)
- E-H Diallo
- Department of Medicine, University of Montreal, QC, Canada
| | - P Brouillard
- Department of Medicine, University of Montreal, QC, Canada
| | - J-M Raymond
- Division of Cardiology, Department of Medicine, Montreal University Hospital Centre, Montreal, QC, Canada
| | - M Liberman
- Division of Thoracic Surgery, Department of Surgery, Montreal University Hospital Centre, Montreal, QC, Canada
| | - E Duceppe
- Division of Internal Medicine, Department of Medicine, Montreal University Hospital Centre, Montreal, QC, Canada
| | - B J Potter
- Division of Cardiology, Department of Medicine, Montreal University Hospital Centre, Montreal, QC, Canada
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23
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Deng CY, Zou AL, Sun L, Ji Y. Development and Validation of a Postoperative Prognostic Nomogram to Predict Recurrence in Patients with Persistent Atrial Fibrillation: A Retrospective Cohort Study. CARDIOVASCULAR INNOVATIONS AND APPLICATIONS 2023. [DOI: 10.15212/cvia.2023.0001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023] Open
Abstract
Background: Patients with persistent atrial fibrillation (PsAF) have a high risk of recurrence after catheter radiofrequency ablation. Nevertheless, no effective prognostic tools have been developed to identify these high-risk patients to date. This study sought to develop and validate a simple linear predictive model for predicting postoperative recurrence in patients with PsAF.
Methods: From June 2013 to June 2021, patients with PsAF admitted to our hospital were enrolled in this single-center, retrospective, observational study. The characteristics substantially associated with recurrence in patients with PsAF were screened through univariate and multivariate logistic regression analysis. The receiver operating characteristic curve was used to assess the predictive significance of the nomogram model after nomogram development. Furthermore, to assess the clinical value of the nomogram, we performed calibration curve and decision curve analyses.
Results: A total of 209 patients were included in the study, 42 (20.10%) of whom were monitored up to 1 year for recurrent AF. The duration of AF episodes, left atrial diameter, BMI, CKMB, and alcohol consumption were found to be independent risk factors (P<0.05) and were integrated into the nomogram model development. The area under the curve was 0.895, the sensitivity was 93.3%, and the specificity was 71.4%, thus indicating the model’s excellent predictive ability. The C-index of the predictive nomogram model was 0.906. Calibration curve and decision curve analyses further revealed that the model had robust prediction and strong discrimination ability.
Conclusion: This simple, practical, and innovative nomogram can help clinicians in evaluation of the risk of PsAF recurrence after catheter ablation, thus facilitating preoperative evaluation, postoperative monitoring and ultimately the construction of more personalized therapeutic protocols.
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Affiliation(s)
- Cong-Ying Deng
- Department of Cardiovascular Medicine, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China
| | - Ai-Lin Zou
- Department of Cardiovascular Medicine, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China
| | - Ling Sun
- Department of Cardiovascular Medicine, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China
| | - Yuan Ji
- Department of Cardiovascular Medicine, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China
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Mikhryakova PP, Butova XA, Myachina TA, Simonova RA, Khokhlova AD. A Study of Mechanical Alternans in Single Rat Cardiomyocytes in Acetylcholine-CaCl2 Induced Atrial Fibrillation. J EVOL BIOCHEM PHYS+ 2022. [DOI: 10.1134/s002209302207002x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Use of P wave indices to evaluate efficacy of catheter ablation and atrial fibrillation recurrence: a systematic review and meta-analysis. J Interv Card Electrophysiol 2022; 65:827-840. [PMID: 35488962 DOI: 10.1007/s10840-022-01147-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/31/2022] [Indexed: 12/16/2022]
Abstract
BACKGROUND To investigate the changes of P wave indices in atrial fibrillation (AF) patients after catheter ablation and the association between P wave indices and AF recurrence. METHODS PubMed, Embase, and Cochrane Database were searched through September 15th 2021 for studies on the association between P wave indices and AF with catheter ablation. Heterogeneity was estimated using the I2 statistic, the random effects model was used to calculate the pooled results, and summary receiver operating characteristic curve (SROC) was used to evaluate the predictive value. RESULTS Among included fourteen studies with 1674 AF patients, we found significantly decreased P wave dispersion (Pdis) (mean difference [MD]: - 6.5 ms, 95% confidence interval [95% CI]: - 11.81 to - 1.18, P = 0.02) after cryoballoon ablation (CBA) or radiofrequency ablation (RFA), and maximum P wave (Pmax) (MD: - 8.57 ms, 95% CI: - 17.03 to - 0.10, P = 0.05) after RFA only, but increased minimum P wave (Pmin) (MD: 3.43 ms, 95% CI: 1.07 to 5.79, P < 0.01) after CBA only. Pdis measured before ablation was remarkably higher (MD: 5.79 ms, 95% CI: 2.23 to 9.36, P < 0.01) in patients with recurrence than without; meanwhile, Pmax was higher measured both before and after ablation (MD: 6.49 ms, 95% CI: 2.30 to 10.69, P < 0.01 and MD: 11.2 ms, 95% CI: 2.88 to 19.52, P < 0.01). Furthermore, SROC analysis showed acceptable predictive efficiencies of Pdis (AUC = 0.776) and Pmax (AUC = 0.759) for AF recurrence. CONCLUSION Pdis was significantly decreased after AF catheter ablation. Higher Pdis and Pmax may have predictive values for AF recurrence.
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Adenosine and Adenosine Receptors: Advances in Atrial Fibrillation. Biomedicines 2022; 10:biomedicines10112963. [PMID: 36428533 PMCID: PMC9687155 DOI: 10.3390/biomedicines10112963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/07/2022] [Accepted: 11/14/2022] [Indexed: 11/19/2022] Open
Abstract
Atrial fibrillation (AF) is the most common arrhythmia in the world. Because the key to developing innovative therapies that limit the onset and the progression of AF is to fully understand the underlying molecular mechanisms of AF, the aim of the present narrative review is to report the most recent advances in the potential role of the adenosinergic system in the pathophysiology of AF. After a comprehensive approach describing adenosinergic system signaling and the mechanisms of the initiation and maintenance of AF, we address the interactions of the adenosinergic system's signaling with AF. Indeed, adenosine release can activate four G-coupled membrane receptors, named A1, A2A, A2B and A3. Activation of the A2A receptors can promote the occurrence of delayed depolarization, while activation of the A1 receptors can shorten the action potential's duration and induce the resting membrane's potential hyperpolarization, which promote pulmonary vein firing, stabilize the AF rotors and allow for functional reentry. Moreover, the A2B receptors have been associated with atrial fibrosis homeostasis. Finally, the adenosinergic system can modulate the autonomous nervous system and is associated with AF risk factors. A question remains regarding adenosine release and the adenosine receptors' activation and whether this would be a cause or consequence of AF.
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Bertels J, Rottner L, Heeger CH, Maurer T, Reissmann R, Ouyang F, Mathew S, Wohlmuth P, Schlüter M, Kuck KH, Metzner A, Lemeš C. Acute and long-term success of left atrial anterior line and mitral isthmus line ablation in patients after mitral valve surgery. Pacing Clin Electrophysiol 2022; 45:1024-1031. [PMID: 35822917 DOI: 10.1111/pace.14564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 06/04/2022] [Accepted: 06/24/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Perimitral flutter and atrial fibrillation may occur in patients with prior surgical mitral valve (MV) repair or replacement and can be challenging for percutaneous catheter ablation. This study sought to determine the feasibility, acute success and durability of catheter ablation of atrial fibrillation or atrial tachycardia by way of a mitral isthmus line (MIL) or an anterior line (AL). METHODS A total of 81 patients (49 males, mean age 62±11 years) with prior MV replacement (n = 30) or reconstruction (n = 51) underwent creation of a MIL (34) and/or an AL (72). RESULTS Acute bidirectional block of the MIL was successfully achieved in 24/34 cases and of the AL in 64/72 patients. Patients of the control group without prior MV surgery were matched 1:1 with the valve group. In the AL control subgroup, acute bidirectional block was achieved in 65/72 patients. Acute blockage in the MIL control subgroup could be achieved in 31/34 patients. The MIL valve subgroup showed the worst results in terms of durability, whereas a similar trend emerged in the control group and the AL valve subgroup (probability of failure in MIL valve subgroup 2.224 vs. MIL control subgroup 0.605 [Hazard Ratio (HR) = 0.27, 95% confidence interval (CI), 0.11-0.65), p = 0.004]; probability of failure in AL valve subgroup 0.844 vs. AL control subgroup 1.03 [HR = 1.22 (95% CI, 0.66-2.26), p = 0.523]). CONCLUSIONS Percutaneous creation of MIL and AL is feasible and safe in patients with prior MV replacement/repair and associated with moderate acute and long-term success rates to achieve bidirectional block. This article is protected by copyright. All rights reserved.
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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: 1] [Impact Index Per Article: 0.5] [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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Zhang X, Huang J, Li J, Lu Q, Huang Y, Lu D, Tang Y, Zhu J, Zhuang J. Association Between TCF21 Gene Polymorphism with the Incidence of Paroxysmal Atrial Fibrillation and the Efficacy of Radiofrequency Ablation for Patients with Paroxysmal Atrial Fibrillation. Int J Gen Med 2022; 15:4975-4983. [PMID: 35601004 PMCID: PMC9122043 DOI: 10.2147/ijgm.s366956] [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: 03/18/2022] [Accepted: 05/04/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose Atrial fibrillation (AF) is the most common sustained arrhythmia with a high rate of recurrence after catheter ablation. The gene encoding transcription factor 21 (TCF21) has been linked to coronary artery disease risk by human genome-wide association studies in multiple racial ethnic groups. However, the association of TCF21 with AF remains unclear. Patients and Methods Circulating leukocytes in patients with paroxysmal AF (PAF) and 92 age-matched controls without a history of cardiovascular disease, AF and other arrhythmias were collected. A total of 224 PAF patients receiving radiofrequency ablation had an 18-month scheduled follow-up study for recurrence of AF. Three single-nucleotide polymorphisms (SNPs) of TCF21 (rs2327429, rs2327433 and rs12190287) were genotyped by PCR, and serum levels of TCF21 were measured by ELISA. Results More males and smokers were observed in the PAF group compared with controls. C allele of rs2327429, G allele and GG genotype of rs12190287 were markedly associated with the increased onset of PAF. The levels of serum TCF21 were significantly higher in PAF group than those in control group (1.96 ± 0.85 vs 0.86 ± 0.49 ng/mL, P<0.001). Based on logistic regression analysis, we confirmed that risk allele at rs12190287 and serum TCF21 concentration were independently correlated with the incidence of PAF. Furthermore, GG genotype of rs12190287 enhanced the susceptibility of AF recurrence after ablation. Conclusion G allele and GG genotype of rs12190287 in TCF21 and elevated TCF21 concentration are significantly associated with the onset of PAF and recurrence after ablation.
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Affiliation(s)
- Xianlin Zhang
- Department of Cardiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, People’s Republic of China
| | - Juan Huang
- Health Management Centre, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, People’s Republic of China
| | - Jinlong Li
- Department of Cardiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, People’s Republic of China
| | - Qiao Lu
- Department of Cardiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, People’s Republic of China
| | - Yuli Huang
- Department of Cardiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, People’s Republic of China
| | - Dongyu Lu
- Department of Cardiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, People’s Republic of China
| | - Yang Tang
- Department of Cardiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, People’s Republic of China
| | - Jian Zhu
- Department of Cardiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, People’s Republic of China
| | - Jianhui Zhuang
- Department of Cardiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, 200072, People’s Republic of China
- Correspondence: Jianhui Zhuang, Department of Cardiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, 200072, People’s Republic of China, Tel +86-13621742833, Email
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Giorgios T, Antonio F, Limite LR, Felicia L, Zweiker D, Cireddu M, Vlachos K, Hadjis A, D'Angelo G, Baratto F, Bisceglia C, Vergara P, Marzi A, Peretto G, Paglino G, Radinovic A, Gulletta S, Sala S, Mazzone P, Bella PD. Bi‐atrial characterization of the electrical substrate in patients with atrial fibrillation. Pacing Clin Electrophysiol 2022; 45:752-760. [PMID: 35403246 PMCID: PMC9322275 DOI: 10.1111/pace.14490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/19/2022] [Accepted: 03/11/2022] [Indexed: 11/30/2022]
Abstract
Background Methods Results Conclusion
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Affiliation(s)
| | | | | | | | - David Zweiker
- Department of Arrhythmology San Raffaele Hospital Milan Italy
| | - Manuela Cireddu
- Department of Arrhythmology San Raffaele Hospital Milan Italy
| | | | - Alexios Hadjis
- Department of Arrhythmology San Raffaele Hospital Milan Italy
| | | | | | | | | | | | | | | | | | - Simone Gulletta
- Department of Arrhythmology San Raffaele Hospital Milan Italy
| | - Simone Sala
- Department of Arrhythmology San Raffaele Hospital Milan Italy
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31
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Ruan ZB, Liang HX, Wang F, Chen GC, Zhu JG, Ren Y, Zhu L. Influencing Factors of Recurrence of Nonvalvular Atrial Fibrillation after Radiofrequency Catheter Ablation and Construction of Clinical Nomogram Prediction Model. Int J Clin Pract 2022; 2022:8521735. [PMID: 35685501 PMCID: PMC9159117 DOI: 10.1155/2022/8521735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 02/11/2022] [Accepted: 02/21/2022] [Indexed: 12/05/2022] Open
Abstract
PURPOSE This study sought to investigate the predictive factors for atrial fibrillation (AF) recurrence in patients after radiofrequency ablation (RFCA) and construct a nomogram prediction model for providing precious information of ablative strategies. METHODS A total of 221 patients with AF who underwent RFCA were enrolled. Univariate and multivariate Cox regression were used to screen the predictors of recurrence. The receiver operating characteristic (ROC) curve and the Kaplan-Meier (K-M) curve were drawn to analyze the value of predictors. The nomogram model was further constructed to predict the recurrence of AF in patients after RFCA. RESULTS There were 59 cases of AF recurrence after RFCA. Monocyte count/high-density lipoprotein cholesterol (MHR), AF course (COURSE), coronary heart disease (CHD), and AF type (TYPE) were the independent risk factors for predicting AF recurrence after RFCA. Accordingly, a nomogram prediction model based on MHR, COURSE, CHD, and TYPE was constructed with a C-index of 0.818 (95% CI: 0.681∼0.954), while the C-index of verification was 0.802 (95% CI: 0.658∼0.946). CONCLUSIONS Preoperative MHR, COURSE, CHD, and TYPE were independent risk factors for predicting recurrence of AF after RFCA. The nomogram model based on MHR, COURSE, CHD, and TYPE can be used to predict the recurrence of AF after RFCA accurately and individually.
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Affiliation(s)
- Zhong-bao Ruan
- Department of Cardiology, Jiangsu Taizhou People's Hospital, Taizhou 225300, China
| | | | - Fei Wang
- Department of Cardiology, Jiangsu Taizhou People's Hospital, Taizhou 225300, China
| | - Ge-cai Chen
- Department of Cardiology, Jiangsu Taizhou People's Hospital, Taizhou 225300, China
| | - Jun-guo Zhu
- Department of Cardiology, Jiangsu Taizhou People's Hospital, Taizhou 225300, China
| | - Yin Ren
- Department of Cardiology, Jiangsu Taizhou People's Hospital, Taizhou 225300, China
| | - Li Zhu
- Department of Cardiology, Jiangsu Taizhou People's Hospital, Taizhou 225300, China
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Mojica J, Lipartiti F, Al Housari M, Bala G, Kazawa S, Miraglia V, Monaco C, Overeinder I, Strazdas A, Ramak R, Paparella G, Sieira J, Capulzini L, Sorgente A, Stroker E, Brugada P, De Asmundis C, Chierchia GB. Procedural Safety and Efficacy for Pulmonary Vein Isolation with the Novel Polarx™ Cryoablation System: A Propensity Score Matched Comparison with the Arctic Front™ Cryoballoon in the Setting of Paroxysmal Atrial Fibrillation. J Atr Fibrillation 2021; 14:20200455. [PMID: 34950358 DOI: 10.4022/jafib.20200455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 02/12/2021] [Accepted: 06/16/2021] [Indexed: 11/10/2022]
Abstract
Background The novel Polarx™ cryoablation system is currently being studied for atrial fibrillation (AF) ablation. To the best of our knowledge, no study comparing the novel cryoablation system with the standard Arctic Front™ cryoballoon is available in today's literature. This study aims to compare Polarx™ and Arctic Front™ cryoballoon in terms of safety and efficacy. Methods From a total cohort of 202 patients who underwent pulmonary vein (PV) isolation for paroxysmal AF through cryoablation, a population of 30 patients who used Polarx™ were compared with 30 propensity-score matched patients who used Arctic Front™. Results Pulmonary vein occlusion and electrical isolation were achieved in all (100%) veins with a mean number of 1.09 ± 0.3 occlusion per vein using Polarx™ and 1.19 ± 0.5 occlusion per vein using Arctic Front™ (p = 0.6). Shorter procedure and fluoroscopy time were observed with Polarx™ group (60.5 ± 14.23 vs 73.43 ± 13.26 mins, p = 0.001; 12.83 ± 6.03 vs 17.23 ± 7.17 mins, p = 0.01, respectively). Lower cumulative freeze duration per vein was also observed with Polarx™ (203.38 ± 72.03 vs 224.9 ± 79.35 mins, p = 0.02). There was no significant difference in isolation time between the two groups (34.47 ± 21.23 vs 34.18 ± 26.79 secs, p = 0.9). Conclusions The novel Polarx™ cryoablation system showed similar efficacy in vein occlusion and isolation and safety profile when compared to Arctic Front™ cryoablation system. Procedure time, fluoroscopy time, and cumulative freeze duration were significantly lower with Polarx™ cryoablation system.
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Affiliation(s)
- Joerelle Mojica
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium.,Drs Mojica and Lipartiti contributed equally to the article as first authors
| | - Felicia Lipartiti
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium.,Drs Mojica and Lipartiti contributed equally to the article as first authors
| | - Maysam Al Housari
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Gezim Bala
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Shuichiro Kazawa
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Vincenzo Miraglia
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Cinzia Monaco
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Ingrid Overeinder
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Antanas Strazdas
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Robbert Ramak
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Gaetano Paparella
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Juan Sieira
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Lucio Capulzini
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Antonio Sorgente
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Erwin Stroker
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Pedro Brugada
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Carlo De Asmundis
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
| | - Gian-Battista Chierchia
- Heart Rhythm Management Center, Postgraduate Program in Cardiac Electrophysiology and Pacing, Universitair Ziekenhuis Brussel - Vrije Universiteit Brussel - Brussels, Belgium
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Pagani S, Dede' L, Frontera A, Salvador M, Limite LR, Manzoni A, Lipartiti F, Tsitsinakis G, Hadjis A, Della Bella P, Quarteroni A. A Computational Study of the Electrophysiological Substrate in Patients Suffering From Atrial Fibrillation. Front Physiol 2021; 12:673612. [PMID: 34305637 PMCID: PMC8297688 DOI: 10.3389/fphys.2021.673612] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 05/28/2021] [Indexed: 12/19/2022] Open
Abstract
In the context of cardiac electrophysiology, we propose a novel computational approach to highlight and explain the long-debated mechanisms behind atrial fibrillation (AF) and to reliably numerically predict its induction and sustainment. A key role is played, in this respect, by a new way of setting a parametrization of electrophysiological mathematical models based on conduction velocities; these latter are estimated from high-density mapping data, which provide a detailed characterization of patients' electrophysiological substrate during sinus rhythm. We integrate numerically approximated conduction velocities into a mathematical model consisting of a coupled system of partial and ordinary differential equations, formed by the monodomain equation and the Courtemanche-Ramirez-Nattel model. Our new model parametrization is then adopted to predict the formation and self-sustainment of localized reentries characterizing atrial fibrillation, by numerically simulating the onset of ectopic beats from the pulmonary veins. We investigate the paroxysmal and the persistent form of AF starting from electro-anatomical maps of two patients. The model's response to stimulation shows how substrate characteristics play a key role in inducing and sustaining these arrhythmias. Localized reentries are less frequent and less stable in case of paroxysmal AF, while they tend to anchor themselves in areas affected by severe slow conduction in case of persistent AF.
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Affiliation(s)
- S Pagani
- MOX-Department of Mathematics, Politecnico di Milano, Milan, Italy
| | - L Dede'
- MOX-Department of Mathematics, Politecnico di Milano, Milan, Italy
| | - A Frontera
- Department of Arrhythmology, San Raffaele Hospital, Milan, Italy
| | - M Salvador
- MOX-Department of Mathematics, Politecnico di Milano, Milan, Italy
| | - L R Limite
- Department of Arrhythmology, San Raffaele Hospital, Milan, Italy
| | - A Manzoni
- MOX-Department of Mathematics, Politecnico di Milano, Milan, Italy
| | - F Lipartiti
- Department of Arrhythmology, San Raffaele Hospital, Milan, Italy
| | - G Tsitsinakis
- Department of Arrhythmology, San Raffaele Hospital, Milan, Italy
| | - A Hadjis
- Department of Arrhythmology, San Raffaele Hospital, Milan, Italy
| | - P Della Bella
- Department of Arrhythmology, San Raffaele Hospital, Milan, Italy
| | - A Quarteroni
- MOX-Department of Mathematics, Politecnico di Milano, Milan, Italy.,Institute of Mathematics, EPFL, Lausanne, Switzerland
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Uslu A, Küp A, Demir S, Gülşen K, Kanar BG, Çelik M, Taylan G, Kepez A, Akgün T. Evaluation of acute alterations in electrocardiographic parameters after cryoballoon ablation of atrial fibrillation and possible association with recurrence. Anatol J Cardiol 2021; 25:468-475. [PMID: 34236321 DOI: 10.5152/anatoljcardiol.2021.33726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE This study aimed to evaluate the acute effect of cryoballoon ablation (CB-A) on electrocardiographic parameters that have been suggested to reflect heterogeneity in atrial conduction and ventricular repolarization. METHODS A total of 67 patients (52.6±13.2 years, 43 men) without any exclusion criteria who had undergone CB-A for atrial fibrillation (AF) between January 01, 2015, and December 31, 2018, constituted our study population. Electrographic recordings obtained before and after the ablation procedure on the same day were retrospectively evaluated for the P-wave dispersion, QTc dispersion, Tp-Te interval, and Tp-Te/QT ratio. The pre- and post-ablation values were tested for significant differences. The association of the possible CB-A-related changes in these parameters with AF recurrence during follow-up was evaluated. RESULTS P dispersion (30.1±6.8 vs. 35.9±9.4 ms, p<0.001), QT dispersion (20.7±7.5 vs. 24.0±8.8 ms, p<0.001), Tp-Te duration (on V5 83.6±8.1 vs. 110.2±9.5 ms, p<0.001), and Tp-Te/QT ratio (on V5 0.22±0.03 vs. 0.28±0.02, p<0.001) were observed to increase significantly after CB-A. There was no association between the magnitudes of change in any parameter and AF recurrence. CONCLUSION CB-A had significant effects on electrocardiographic parameters related to atrial conduction and ventricular repolarization in the acute phase after CB-A. Further prospective studies are required to examine the time-related course of these alterations and their impact on clinical outcomes.
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Affiliation(s)
- Abdulkadir Uslu
- Department of Cardiology, Kartal Koşuyolu Heart Training and Research Hospital; İstanbul-Turkey
| | - Ayhan Küp
- Department of Cardiology, Kartal Koşuyolu Heart Training and Research Hospital; İstanbul-Turkey
| | - Serdar Demir
- Department of Cardiology, Kartal Koşuyolu Heart Training and Research Hospital; İstanbul-Turkey
| | - Kamil Gülşen
- Department of Cardiology, Kartal Koşuyolu Heart Training and Research Hospital; İstanbul-Turkey
| | - Batur Gönenç Kanar
- Department of Cardiology, Faculty of Medicine, Marmara University; İstanbul-Turkey
| | - Mehmet Çelik
- Department of Cardiology, Kartal Koşuyolu Heart Training and Research Hospital; İstanbul-Turkey
| | - Gökay Taylan
- Department of Cardiology, Faculty of Medicine, Trakya University; Edirne-Turkey
| | - Alper Kepez
- Department of Cardiology, Faculty of Medicine, Marmara University; İstanbul-Turkey
| | - Taylan Akgün
- Department of Cardiology, Kartal Koşuyolu Heart Training and Research Hospital; İstanbul-Turkey
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Subclinical left atrial dysfunction profiles for prediction of cardiac outcome in the general population. J Hypertens 2021; 38:2465-2474. [PMID: 32649644 DOI: 10.1097/hjh.0000000000002572] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Echocardiographic definitions of subclinical left atrial dysfunction based on epidemiological data remain scarce. In this population study, we derived outcome-driven thresholds for echocardiographic left atrial function parameters discriminating between normal and abnormal values. METHODS In 1306 individuals (mean age, 50.7 years; 51.6% women), we echocardiographically assessed left atrial function and LV global longitudinal strain. We derived cut-off values for left atrial emptying fraction (LAEF), left atrial function index (LAFI) and left atrial reservoir strain (LARS) to define left atrial dysfunction using receiver-operating curve threshold analysis. Main outcome was the incidence of cardiac events and atrial fibrillation (AFib) on average 8.5 years later. RESULTS For prediction of new-onset AFib, left atrial cut-offs yielding the best balance between sensitivity and specificity (highest Youden index) were: LAEF less than 55%, LAFI less than 40.5 and LARS less than 23%. Applying these cut-offs, abnormal LAEF, LAFI and LARS were, respectively, present in 27, 37.1 and 18.1% of the cohort. Abnormal LARS (<23%) was independently associated with higher risk for cardiac events and new-onset AFib (P ≤ 0.012). Participants with both abnormal LAEF and LARS presented a significantly higher risk to develop cardiac events (hazard ratio: 2.10; P = 0.014) and AFib (hazard ratio: 6.45; P = 0.0036) than normal counterparts. The concomitant presence of an impaired LARS and LV global longitudinal strain improved prognostic accuracy beyond a clinical risk model for cardiac events and the CHARGE-AF Risk Score for AFib. CONCLUSION Left atrial dysfunction based on outcome-driven thresholds predicted cardiac events and AFib independent of conventional risk factors. Screening for subclinical left atrial and LV systolic dysfunction may enhance cardiac disease prediction in the community.
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Takahira H, Kajiyama T, Kondo Y, Nakano M, Nakano M, Ito R, Kitagawa M, Sugawara M, Chiba T, Kobayashi Y. Pathophysiological background and prognosis of common atrial flutter in non-elderly patients: Comparison to Atrial Fibrillation. J Cardiol 2021; 78:362-367. [PMID: 34140202 DOI: 10.1016/j.jjcc.2021.05.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 04/25/2021] [Accepted: 05/07/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND It is unclear whether there is any difference in the background and prognosis between non-elderly patients who undergo catheter ablation of atrial fibrillation (AF) and common atrial flutter (CAFL). PURPOSE To investigate the difference between the patient background of both CAFL and AF in the non-elderly. METHODS In 526 consecutive patients who underwent catheter ablation of clinical paroxysmal/persistent CAFL or AF in our hospital, we enrolled only patients under 60 years old. Cases harboring both AFL and AF were excluded. We analyzed the patient characteristics, echocardiographic findings, electrocardiographic (ECG) abnormalities during sinus rhythm, and clinical course after ablation. RESULTS In total, 196 patients (Cohort 1: 142 males, 156 AF cases) were analyzed. AFL patients were younger than AF patients (47.4 ± 10.6 vs. 50.2 ± 6.4years, p = 0.031) and organic heart disease (OHD) was significantly more common in AFL patients than AF patients (42.5% vs. 11.5%, p<0.001). In 161 patients excluding OHD (Cohort 2), ECG abnormalities were more frequent in AFL than in AF patients (78.3% vs. 39.1%, p = 0.001). There were no significant differences in all-cause death, onset of heart failure, and cerebral strokes. On the other hand, the number of cases that required a pacemaker was significantly higher in the CAFL group than AF group (0.0% vs. 26.1%, p-value <0.001). These results suggested that CAFL may reflect occurrence of any atrial myocardial damage, even if it does not lead to heart failure. CONCLUSIONS Our present study suggested that CAFL may be associated with a broader atrial myocardial disorder in non-elderly patients.
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Affiliation(s)
- Haruhiro Takahira
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Takatsugu Kajiyama
- Department of Advanced Cardiorhythm Therapeutics, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
| | - Yusuke Kondo
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Masahiro Nakano
- Department of Advanced Cardiorhythm Therapeutics, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Miyo Nakano
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Ryo Ito
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Mari Kitagawa
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Masafumi Sugawara
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Toshinori Chiba
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yoshio Kobayashi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
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Szili-Torok T, Kis Z, Bhagwandien R, Wijchers S, Yap SC, Hoogendijk M, Dumas N, Haeusser P, Geczy T, Kong MH, Ruppersberg P. Functional electrographic flow patterns in patients with persistent atrial fibrillation predict outcome of catheter ablation. J Cardiovasc Electrophysiol 2021; 32:2148-2158. [PMID: 34041824 PMCID: PMC8453922 DOI: 10.1111/jce.15115] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 03/19/2021] [Accepted: 04/01/2021] [Indexed: 11/26/2022]
Abstract
Aims Electrographic flow (EGF) mapping is a method to detect action potential sources within the atria. In a double‐blinded retrospective study we evaluated whether sources detected by EGF are related to procedural outcome. Methods EGF maps were retrospectively generated using the Ablamap® software from unipolar data recorded with a 64‐pole basket catheter from patients who previously underwent focal impulse and rotor modulation‐guided ablation. We analyzed patient outcomes based on source activity (SAC) and variability. Freedom from atrial fibrillation (AF) was defined as no recurrence of AF, atypical flutter or atrial tachycardia at the follow‐up visits. Results EGF maps were from 123 atria in 64 patients with persistent or long‐standing persistent AF. Procedural outcome correlation with SAC peaked at >26%. S‐type EGF signature (source‐dependent AF) is characterized by stable sources with SAC > 26% and C‐type (source‐independent AF) is characterized by sources with SAC ≤ 26%. Cases with AF recurrence at 3‐, 6‐, or 12‐month follow‐up showed a median final SAC 34%; while AF‐free patients had sources with significantly lower median final SAC 21% (p = .0006). Patients with final SAC and Variability above both thresholds had 94% recurrence, while recurrence was only 36% for patients with leading source SAC and variability below threshold (p = .0001). S‐type EGF signature post‐ablation was associated with an AF recurrence rate 88.5% versus 38.1% with C‐type EGF signature. Conclusions EGF mapping enables the visualization of active AF sources. Sources with SAC > 26% appear relevant and their presence post‐ablation correlates with high rates of AF recurrence.
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Affiliation(s)
| | - Zsuzsanna Kis
- Department of Cardiology, Erasmus MC, Rotterdam, The Netherlands
| | | | - Sip Wijchers
- Department of Cardiology, Erasmus MC, Rotterdam, The Netherlands
| | - Sing-Chien Yap
- Department of Cardiology, Erasmus MC, Rotterdam, The Netherlands
| | - Mark Hoogendijk
- Department of Cardiology, Erasmus MC, Rotterdam, The Netherlands
| | - Nadege Dumas
- Department of Cardiology, Erasmus MC, Rotterdam, The Netherlands
| | - Philip Haeusser
- Department of Cardiology, Erasmus MC, Rotterdam, The Netherlands
| | - Tamas Geczy
- Department of Cardiology, Erasmus MC, Rotterdam, The Netherlands
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Kulikov AA, Sapelnikov OV, Uskach TM, Cherkashin DI, Grishin IR, Akchurin RS. Rotor Drivers in Induction and Maintenance of Atrial Fibrillation. RATIONAL PHARMACOTHERAPY IN CARDIOLOGY 2021. [DOI: 10.20996/1819-6446-2021-04-16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Atrial fibrillation is the most common arrhythmia in clinical practice. It is associated with an increased risk of stroke, chronic heart failure, and sudden cardiac death. Our options of restoring and maintaining sinus rhythm have a very limited effect, both in the case of antiarrhythmic and catheter treatment. Catheter ablation has proven to be a more effective approach than antiarrhythmic therapy. The success rate of the procedure reaches 70%. However, radiofrequency ablation is associated with a risk of complications, with 4.5% of patients likely to develop major complications, including tamponade (1.31%), femoral pseudoaneurysm (0.71%), and death (0.15%). Given the generally recognized dominant role of the pulmonary veins in the induction of atrial fibrillation, their electrical isolation has become the recommended tactic of the catheter approach. In the case of patients with paroxysmal form of atrial fibrillation, the success rate of the procedure reaches 87%. Unfortunately, in the case of persistent forms of atrial fibrillation, the effectiveness of the primary procedure decreases to 28% and reaches 51% with repeated interventions. In addition to the anatomically oriented isolation of the pulmonary veins, a number of strategies have been proposed to reach the secondary zones of atrial fibrillation induction. The results of recent studies on the effectiveness of strategies for ablation of rotor regions and their role in the induction and maintenance of AF may lead to the further development of catheter ablation techniques and an individual radiofrequency ablation approach in a particular patient.
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Munro ML, van Hout I, Aitken-Buck HM, Sugunesegran R, Bhagwat K, Davis PJ, Lamberts RR, Coffey S, Soeller C, Jones PP. Human Atrial Fibrillation Is Not Associated With Remodeling of Ryanodine Receptor Clusters. Front Cell Dev Biol 2021; 9:633704. [PMID: 33718369 PMCID: PMC7947344 DOI: 10.3389/fcell.2021.633704] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 02/08/2021] [Indexed: 12/02/2022] Open
Abstract
The release of Ca2+ by ryanodine receptor (RyR2) channels is critical for cardiac function. However, abnormal RyR2 activity has been linked to the development of arrhythmias, including increased spontaneous Ca2+ release in human atrial fibrillation (AF). Clustering properties of RyR2 have been suggested to alter the activity of the channel, with remodeling of RyR2 clusters identified in pre-clinical models of AF and heart failure. Whether such remodeling occurs in human cardiac disease remains unclear. This study aimed to investigate the nanoscale organization of RyR2 clusters in AF patients – the first known study to examine this potential remodeling in diseased human cardiomyocytes. Right atrial appendage from cardiac surgery patients with paroxysmal or persistent AF, or without AF (non-AF) were examined using super-resolution (dSTORM) imaging. Significant atrial dilation and cardiomyocyte hypertrophy was observed in persistent AF patients compared to non-AF, with these two parameters significantly correlated. Interestingly, the clustering properties of RyR2 were remarkably unaltered in the AF patients. No significant differences were identified in cluster size (mean ∼18 RyR2 channels), density or channel packing within clusters between patient groups. The spatial organization of clusters throughout the cardiomyocyte was also unchanged across the groups. RyR2 clustering properties did not significantly correlate with patient characteristics. In this first study to examine nanoscale RyR2 organization in human cardiac disease, these findings indicate that RyR2 cluster remodeling is not an underlying mechanism contributing to altered channel function and subsequent arrhythmogenesis in human AF.
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Affiliation(s)
- Michelle L Munro
- Department of Physiology and HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Isabelle van Hout
- Department of Physiology and HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Hamish M Aitken-Buck
- Department of Physiology and HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | | | - Krishna Bhagwat
- Department of Cardiothoracic Surgery, Dunedin Hospital, Dunedin, New Zealand
| | - Philip J Davis
- Department of Cardiothoracic Surgery, Dunedin Hospital, Dunedin, New Zealand
| | - Regis R Lamberts
- Department of Physiology and HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Sean Coffey
- Department of Medicine and HeartOtago, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Christian Soeller
- Living Systems Institute, University of Exeter, Exeter, United Kingdom
| | - Peter P Jones
- Department of Physiology and HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
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Ni H, Pan W, Jin Q, Xie Y, Zhang N, Chen K, Lin T, Lin C, Xie Y, Wu J, Ni P, Wu L. Label-free proteomic analysis of serum exosomes from paroxysmal atrial fibrillation patients. Clin Proteomics 2021; 18:1. [PMID: 33407078 PMCID: PMC7789314 DOI: 10.1186/s12014-020-09304-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 10/28/2020] [Indexed: 02/07/2023] Open
Abstract
Background Atrial fibrillation (AF) is the most common cardiac heterogeneous rhythm disorder. It represents a major cause of mortality and morbidity, mainly related to embolic events and heart failure. Mechanisms of AF are complex and remain incompletely understood. Recent evidence suggests exosomes are membrane-coated objects released by many cell-types. Their presence in body fluids and the variable surface composition and content render them attractive as a mechanism for potential biomarkers. However, the content of serum exosomes of AF patients has not been fully delineated. Methods In this work, the serum exosomes from AF patients and healthy donors were used to compare changes in the exosome protein content. Exosomes were isolated from serum of AF patients and healthy donors and their purity was confirmed by Western blotting assays and transmission electron microscopy (TEM). Label-free LC–MS/MS quantitative proteomic analysis was applied to analyze protein content of serum exosomes. Results A total of 440 exosomal protein groups were identified, differentially expressed proteins were filtrated with fold change ≥ 2.0 (AF/controls protein abundance ratio ≥ 2 or ≤ 0.5) and p value less than 0.05 (p < 0.05), significantly changed in abundance group contains 39 elevated proteins and 18 reduced proteins, while consistent presence/absence expression profile group contains 40 elevated proteins and 75 reduced proteins. Bioinformatic analysis of differential exosomal proteins confirmed the significant enrichment of components involved in the anticoagulation, complement system and protein folding. Parallel-Reaction Monitoring Relative Quantitative Analysis (PRM) further suggested that AF related to complement system and protein folding. Conclusions These results revealed the composition and potential function of AF serum exosomes, thus providing a new perspective on the complement system and protein folding to AF.
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Affiliation(s)
- Hanwen Ni
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Wenqi Pan
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Qi Jin
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Yucai Xie
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Ning Zhang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Kang Chen
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Tianyou Lin
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Changjian Lin
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Yun Xie
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Jiemin Wu
- Faculty of Medical Laboratory Science, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China
| | - Peihua Ni
- Faculty of Medical Laboratory Science, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China.
| | - Liqun Wu
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197# Ruijin Rd, Huangpu District, Shanghai, 200025, China.
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Waranugraha Y, Rizal A, Setiawan D, Aziz IJ. Additional complex fractionated atrial electrogram ablation does not improve the outcomes of non-paroxysmal atrial fibrillation: A systematic review and meta-analysis of randomized controlled trials. Indian Heart J 2021; 73:63-73. [PMID: 33714411 PMCID: PMC7961253 DOI: 10.1016/j.ihj.2020.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/04/2020] [Accepted: 11/03/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Non-paroxysmal atrial fibrillation (AF) has a complex pathophysiological process. The standard catheter ablation approach is pulmonary vein isolation (PVI). The additional value of complex fractionated electrogram (CFAE) ablation is still unclear. We aimed to investigate the additional value of CFAE ablation for non-paroxysmal AF. METHODS We performed a systematic review and meta-analysis of randomized controlled studies up to May 2020. Articles comparing pulmonary vein isolation (PVI) plus CFAE ablation and PVI alone for AF were obtained from the electronic scientific databases. The pooled mean difference (MD) and pooled risk ratio (RR) were assessed. RESULTS A total of 8 randomized controlled trials (RCTs) including 1034 patients were involved. Following a single catheter ablation procedure, the presence of any atrial tachyarrhythmia (ATA) with or without the use of antiarrhythmic drugs (AADs) between both groups were not significantly different (RR = 1.1; 95% confidence interval [CI] = 0.97-1.24; p = 0.13). Similar results were also obtained for the presence of any ATA without the use of AADs (RR = 1.08; 95% CI = 0.96-1.22; p = 0.2). The additional CFAE ablation took longer procedure times (MD = 46.95 min; 95% CI = 38.27-55.63; p = < 0.01) and fluoroscopy times (MD = 11.69 min; 95% CI = 8.54-14.83; p = < 0.01). CONCLUSION Additional CFAE ablation failed to improve the outcomes of non-paroxysmal AF patients. It also requires a longer duration of procedure times and fluoroscopy times.
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Affiliation(s)
- Yoga Waranugraha
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Universitas Brawijaya, Malang, Indonesia; Brawijaya Cardiovascular Research Center, Malang, Indonesia.
| | - Ardian Rizal
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Universitas Brawijaya, Malang, Indonesia; Brawijaya Cardiovascular Research Center, Malang, Indonesia
| | - Dion Setiawan
- Brawijaya Cardiovascular Research Center, Malang, Indonesia
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Crispi V, Isaac E, Abah U, Shackcloth M, Lopez E, Eadington T, Taylor M, Kandadai R, Marshall NR, Gurung A, Rogers LJ, Marchbank A, Qadri S, Loubani M. Surgical factors associated with new-onset postoperative atrial fibrillation after lung resection: the EPAFT multicentre study. Postgrad Med J 2020; 98:177-182. [PMID: 33310899 DOI: 10.1136/postgradmedj-2020-138904] [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: 08/22/2020] [Revised: 10/19/2020] [Accepted: 10/29/2020] [Indexed: 11/04/2022]
Abstract
PURPOSE OF THE STUDY Postoperative atrial fibrillation (POAF) is a recognised complication in approximately 10% of major lung resections. In order to best target preoperative treatment, this study aimed at determining the association of incidence of POAF in patients undergoing lung resection to surgical and anatomical factors, such as surgical approach, extent of resection and laterality. STUDY DESIGN Evaluation of Post-operative Atrial Fibrillation in Thoracic surgery (EPAFT): a multicentre, population-based, retrospective, cross-sectional, observational study including 1367 patients undergoing lung resections between April 2016 and March 2017. The primary outcome was the presence of POAF following resection. POAF was defined as at least one episode of symptomatic or asymptomatic AF confirmed by ECG within 7 days from the thoracic procedure or prior to discharge from the hospital. RESULTS POAF was observed in 7.4% of patients: 3.1% in minor resection (video-assisted thoracoscopic surgery (VATS): 2.5%; thoracotomy: 3.8%), 9.0% in simple lobectomy (VATS: 7.3%, thoracotomy: 9.9%), 6.0% in complex resection (thoracotomy: 6.3%) and 11.4% in pneumonectomy. POAF was higher in left (4.0%) vs right (2.4%) minor resections, and in left (9.9%) vs right (8.3%) lobectomy, but higher in right (7.5%) complex resections, and the highest in right pneumonectomy (17.6%). No significant variations were observed as per sex, laterality or resected lobes. A positive univariable and multivariable association was observed for increasing age and increasing extent of resection, but not thoracotomy. Median (Q1-Q3) hospital stay was 9 (7-14) days in POAF and 5 (4-7) days in non-AF patients (p<0.001), with an increased cerebrovascular accident burden (p<0.001) and long-term mortality (p<0.001). CONCLUSIONS Among patients undergoing lung resection, POAF was significantly associated with age, increasing invasiveness of approach and increasing extent of resection. In addition, POAF carried a significant long-term mortality rate and burden of cerebrovascular accident. Appropriate prophylaxis should be targeted at these groups.
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Affiliation(s)
- Vassili Crispi
- Hull York Medical School, University of Hull, Hull, Kingston upon Hull, UK .,Department of Thoracic Surgery, Castle Hill Hospital, Cottingham, East Riding of Yorkshire, UK
| | - Emmanuel Isaac
- Department of Thoracic Surgery, Castle Hill Hospital, Cottingham, East Riding of Yorkshire, UK
| | - Udo Abah
- Department of Thoracic Surgery, Liverpool Heart and Chest Hospital NHS Foundation Trust, Liverpool, UK
| | - Michael Shackcloth
- Department of Thoracic Surgery, Liverpool Heart and Chest Hospital NHS Foundation Trust, Liverpool, UK
| | - Eileen Lopez
- Department of Thoracic Surgery, Wythenshawe Hospital, Manchester, UK
| | - Thomas Eadington
- Department of Thoracic Surgery, Wythenshawe Hospital, Manchester, UK
| | - Marcus Taylor
- Department of Thoracic Surgery, Wythenshawe Hospital, Manchester, UK
| | - Rammohan Kandadai
- Department of Thoracic Surgery, Wythenshawe Hospital, Manchester, UK
| | - Neil R Marshall
- Peninsula Medical School, University of Plymouth, Plymouth, Devon, UK
| | - Anil Gurung
- Great Western Hospital Foundation NHS Trust, Swindon, Swindon, UK
| | - Luke J Rogers
- Department of Thoracic Surgery, University Hospitals Plymouth NHS Trust, Plymouth, UK
| | - Adrian Marchbank
- Department of Thoracic Surgery, University Hospitals Plymouth NHS Trust, Plymouth, UK
| | - Suhail Qadri
- Department of Thoracic Surgery, Castle Hill Hospital, Cottingham, East Riding of Yorkshire, UK
| | - Mahmoud Loubani
- Department of Thoracic Surgery, Castle Hill Hospital, Cottingham, East Riding of Yorkshire, UK
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Mangiafico V, Saberwal B, Lavalle C, Raharja A, Ahmed Z, Papageorgiou N, Ahsan S. The role of CT in detecting AF substrate. Trends Cardiovasc Med 2020; 31:457-466. [PMID: 33068722 DOI: 10.1016/j.tcm.2020.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/29/2020] [Accepted: 10/10/2020] [Indexed: 10/23/2022]
Abstract
Despite technological advancements and evolving ablation strategies, atrial fibrillation catheter ablation outcome remains suboptimal for a cohort of patients. Imaging-based biomarkers have the potential to play a pivotal role in the overall assessment and prognostic stratification of AF patients, allowing for tailored treatments and individualized care. Alongside consolidated evaluation parameters, novel imaging biomarkers that can detect and stage the remodelling process and correlate it to electrophysiological phenomena are emerging. This review aims to provide a better understanding of the different types of atrial substrate, and how Computed Tomography can be used as a pre-ablation risk stratification tool by assessing the various novel imaging biomarkers, providing a valuable insight into the mechanisms that sustain AF and potentially allowing for a patient-specific ablation strategy.
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Affiliation(s)
- Valentina Mangiafico
- Department of Cardiovascular, Respiratory, Nephrological, Anesthesiological and Geriatric Sciences, "Sapienza" University of Rome, Policlinico Umberto I, Rome, Italy.
| | - Bunny Saberwal
- Barts Heart Centre, West Smithfield, London, EC1A 7BE, England.
| | - Carlo Lavalle
- Department of Cardiovascular, Respiratory, Nephrological, Anesthesiological and Geriatric Sciences, "Sapienza" University of Rome, Policlinico Umberto I, Rome, Italy.
| | - Antony Raharja
- Barts Heart Centre, West Smithfield, London, EC1A 7BE, England.
| | - Zuhair Ahmed
- Queen Mary University of London, London, England.
| | | | - Syed Ahsan
- Barts Heart Centre, West Smithfield, London, EC1A 7BE, England.
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Lim SK, Kim JY, On YK, Jeong DS. Mid-Term Results of Totally Thoracoscopic Ablation in Patients with Recurrent Atrial Fibrillation after Catheter Ablation. THE KOREAN JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY 2020; 53:270-276. [PMID: 32919447 PMCID: PMC7553833 DOI: 10.5090/kjtcs.19.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 12/25/2019] [Accepted: 04/12/2020] [Indexed: 12/26/2022]
Abstract
Background We investigated the impact of previous catheter ablation (CA) on the midterm outcomes of totally thoracoscopic ablation in patients with lone atrial fibrillation (AF). Methods Between February 2012 and July 2018, 332 patients underwent totally thoracoscopic ablation for the treatment of AF (persistent AF; n=264, 80%). The patients were stratified into CA (n=47, 14%) and non-CA (nCA; n=285, 86%) groups according to their CA history. Results All the baseline clinical characteristics and risk factors were similar between the groups except for age, percentage of male patients, prevalence of paroxysmal AF, prior percutaneous coronary intervention, and left atrial volume index (LAVI). No significant intergroup differences were observed in the incidence of early and late complications. At late follow-up, normal sinus rhythm was observed in 92% (43 of 47) of the patients in the CA group and 85% (242 of 285) of the patients in the nCA group (p=0.268). The rate of freedom from AF recurrence at 5 years was 55.3%±11.0% in the CA group, which was similar to that in the nCA group (55.7%±5.1%, p=0.690). In Cox regression analysis, preoperative brain natriuretic peptide levels and LAVI were associated with AF recurrence, but CA history was not significant. Conclusion Totally thoracoscopic ablation was safe and effective in treating AF irrespective of CA history. A history of CA did not appear to affect the procedural complexity.
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Affiliation(s)
- Suk Kyung Lim
- Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Joo Yeon Kim
- Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Young Keun On
- Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Dong Seop Jeong
- Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Nakamura R, Yamauchi Y, Okishige K, Kurabayashi M, Goya M, Sasano T. The impact of left atrial inferior wall isolation, in addition to pulmonary veins and left posterior wall, on long-standing persistent atrial fibrillation. HeartRhythm Case Rep 2020; 6:702-705. [PMID: 33101936 PMCID: PMC7573384 DOI: 10.1016/j.hrcr.2020.06.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
- Rena Nakamura
- Heart Center, Japan Red Cross Yokohama City Bay Hospital, Yokohama, Japan
| | - Yasuteru Yamauchi
- Heart Center, Japan Red Cross Yokohama City Bay Hospital, Yokohama, Japan
| | - Kaoru Okishige
- Heart Center, Japan Red Cross Yokohama City Bay Hospital, Yokohama, Japan
| | - Manabu Kurabayashi
- Heart Center, Japan Red Cross Yokohama City Bay Hospital, Yokohama, Japan
| | - Masahiko Goya
- Department of Cardiology, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tetsuo Sasano
- Department of Cardiology, Tokyo Medical and Dental University, Tokyo, Japan
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46
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Filipovic K, Bellmann B, Sultan A, LÜker J, Plenge T, Steven D. Hydrochlorothiazide therapy: impact on early recurrence of atrial fibrillation after catheter ablation? Minerva Cardiol Angiol 2020; 69:102-108. [PMID: 32989962 DOI: 10.23736/s2724-5683.20.05170-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Hypokalemia has been linked to electrocardiogram changes and afterdepolarization-mediated arrhythmias. However, the association between hypokalemia and atrial fibrillation (AF) has not been well studied. Hydrochlorothiazide (HCT) diuretic therapy was shown to be associated with hypokalemia in multiple studies. We aimed to determine whether HCT therapy is associated with early recurrence of AF after radiofrequency (RF) catheter ablation during a 3-month follow-up. METHODS We performed a retrospective registry analysis of our internal AF ablation registry, containing 807 consecutive patients that underwent RF ablation for symptomatic AF. Propensity score matching was used to match 156 patients on HCT therapy with 156 controls. Furthermore, we performed propensity score matching between the first and the fourth quartile of baseline serum potassium (K) concentrations in the initial population (N.=807). RESULTS We observed a small but statistically significant difference in baseline mean potassium levels between the HCT group and the control group (4.03 mmol/L vs. 4.19 mmol/L respectively, P=0.001). There was no difference in short term recurrence of atrial fibrillation in the HCT group compared to the propensity score matched control group (41.0% [N.=64] vs. 45.5% [N.=71], P=0.424). In the comparison between the first and the fourth quartile of baseline serum potassium values, no difference in AF recurrence (38.2% [N.=63] vs. 37.0% [N.=61], P=0.820) during a 3-month follow-up after ablation was observed between both groups. CONCLUSIONS Patients on HCT therapy showed no difference in short term recurrence of AF after ablation compared to propensity matched controls.
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Affiliation(s)
- Karlo Filipovic
- Department of Electrophysiology, University Hospital of Cologne, Cologne, Germany -
| | - Barbara Bellmann
- Department of Electrophysiology, University Hospital of Cologne, Cologne, Germany
| | - Arian Sultan
- Department of Electrophysiology, University Hospital of Cologne, Cologne, Germany
| | - Jakob LÜker
- Department of Electrophysiology, University Hospital of Cologne, Cologne, Germany
| | - Tobias Plenge
- Department of Electrophysiology, University Hospital of Cologne, Cologne, Germany
| | - Daniel Steven
- Department of Electrophysiology, University Hospital of Cologne, Cologne, Germany
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47
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Mac Curtain B, Mannion J, David S, Byrne R, Boles U. Dynamic Local Activation Time Mapping in Heavily Scarred Left Atrium and Persistent Atrial Fibrillation: A proof of concept case report. J Atr Fibrillation 2020; 13:2415. [PMID: 34950299 DOI: 10.4022/jafib.2415] [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] [Received: 08/22/2020] [Revised: 08/27/2020] [Accepted: 08/30/2020] [Indexed: 11/10/2022]
Abstract
We report the case of a 68-year-old male, presenting with persistent atrial fibrillation (Pe AF) refractory to anti arrhythmic medications and cardioversion, on a background history of ischaemic heart disease. Pre and post standard pulmonary vein isolation (PVI), left atrial (LA) voltageanalyses wereperformed, followed by dynamic local activation time (DLAT) mapping in addition to focal activity identification.Thisdemonstrated a heavily scarred LA, and a number ofareas of focal activity. The patient remained in atrial fibrillation (AF) post rotor (focal activity) targeting,howevernotable changes in AF cycle length (CL)werenotedandslowed by an average of 25.3 milliseconds. Comparison between DLAT mappingpre and post PVI were anatomically similar but not identical. The anatomical distribution of heavy scar areas in the LA did not correspond to the DLAT areas of interest. The patient subsequentlyremained in normal sinus rhythm (SR) for 6 monthson a low dose Beta blockade in a short follow up period. DLAT mapping and its characteristics in heavily scarred LA are reported in this case.
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Affiliation(s)
- Benjamin Mac Curtain
- Heart and Vascular Centre, Cardiology Department, Mater Private Hospital, Dublin 7, Ireland.,Royal College of Surgeons in Ireland,University of Medicine and Health Sciences, School of Medicine, Dublin 2, Ireland
| | - James Mannion
- Heart and Vascular Centre, Cardiology Department, Mater Private Hospital, Dublin 7, Ireland.,University Hospital Waterford, Co. Waterford, Ireland
| | - Santhosh David
- Letterkenny University Hospital, Co Donegal, Letterkenny, Ireland
| | - Roger Byrne
- Heart and Vascular Centre, Cardiology Department, Mater Private Hospital, Dublin 7, Ireland
| | - Usama Boles
- Heart and Vascular Centre, Cardiology Department, Mater Private Hospital, Dublin 7, Ireland
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Larson J, Merchant FM, Patel A, Ndubisi NM, Patel AM, DeLurgio DB, Lloyd MS, El‐Chami MF, Leon AR, Hoskins MH, Keeling WB, Halkos ME, Lattouf OM, Westerman S. Outcomes of convergent atrial fibrillation ablation with continuous rhythm monitoring. J Cardiovasc Electrophysiol 2020; 31:1270-1276. [DOI: 10.1111/jce.14454] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/12/2020] [Accepted: 02/21/2020] [Indexed: 01/20/2023]
Affiliation(s)
- John Larson
- Emory University School of Medicine Atlanta Georgia
| | - Faisal M. Merchant
- Emory University School of Medicine Atlanta Georgia
- Cardiology Division, Section of Cardiac ElectrophysiologyEmory University School of Medicine Atlanta Georgia
| | - Akshar Patel
- Cardiology Division, Section of Cardiac ElectrophysiologyEmory University School of Medicine Atlanta Georgia
| | - Nnaemeka M. Ndubisi
- Emory University School of Medicine Atlanta Georgia
- Division of Cardiothoracic Surgery, Department of SurgeryEmory University School of Medicine Atlanta Georgia
| | - Anshul M. Patel
- Emory University School of Medicine Atlanta Georgia
- Cardiology Division, Section of Cardiac ElectrophysiologyEmory University School of Medicine Atlanta Georgia
| | - David B. DeLurgio
- Emory University School of Medicine Atlanta Georgia
- Cardiology Division, Section of Cardiac ElectrophysiologyEmory University School of Medicine Atlanta Georgia
| | - Michael S. Lloyd
- Emory University School of Medicine Atlanta Georgia
- Cardiology Division, Section of Cardiac ElectrophysiologyEmory University School of Medicine Atlanta Georgia
| | - Mikhael F. El‐Chami
- Emory University School of Medicine Atlanta Georgia
- Cardiology Division, Section of Cardiac ElectrophysiologyEmory University School of Medicine Atlanta Georgia
| | - Angel R. Leon
- Emory University School of Medicine Atlanta Georgia
- Cardiology Division, Section of Cardiac ElectrophysiologyEmory University School of Medicine Atlanta Georgia
| | - Michael H. Hoskins
- Department of CardiologyNew Mexico Heart Institute Albuquerque New Mexico
| | - W. Brent Keeling
- Emory University School of Medicine Atlanta Georgia
- Division of Cardiothoracic Surgery, Department of SurgeryEmory University School of Medicine Atlanta Georgia
| | - Michael E. Halkos
- Emory University School of Medicine Atlanta Georgia
- Division of Cardiothoracic Surgery, Department of SurgeryEmory University School of Medicine Atlanta Georgia
| | - Omar M. Lattouf
- Emory University School of Medicine Atlanta Georgia
- Division of Cardiothoracic Surgery, Department of SurgeryEmory University School of Medicine Atlanta Georgia
| | - Stacy Westerman
- Emory University School of Medicine Atlanta Georgia
- Cardiology Division, Section of Cardiac ElectrophysiologyEmory University School of Medicine Atlanta Georgia
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van Gorp PRR, Trines SA, Pijnappels DA, de Vries AAF. Multicellular In vitro Models of Cardiac Arrhythmias: Focus on Atrial Fibrillation. Front Cardiovasc Med 2020; 7:43. [PMID: 32296716 PMCID: PMC7138102 DOI: 10.3389/fcvm.2020.00043] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/06/2020] [Indexed: 12/13/2022] Open
Abstract
Atrial fibrillation (AF) is the most common cardiac arrhythmia in clinical practice with a large socioeconomic impact due to its associated morbidity, mortality, reduction in quality of life and health care costs. Currently, antiarrhythmic drug therapy is the first line of treatment for most symptomatic AF patients, despite its limited efficacy, the risk of inducing potentially life-threating ventricular tachyarrhythmias as well as other side effects. Alternative, in-hospital treatment modalities consisting of electrical cardioversion and invasive catheter ablation improve patients' symptoms, but often have to be repeated and are still associated with serious complications and only suitable for specific subgroups of AF patients. The development and progression of AF generally results from the interplay of multiple disease pathways and is accompanied by structural and functional (e.g., electrical) tissue remodeling. Rational development of novel treatment modalities for AF, with its many different etiologies, requires a comprehensive insight into the complex pathophysiological mechanisms. Monolayers of atrial cells represent a simplified surrogate of atrial tissue well-suited to investigate atrial arrhythmia mechanisms, since they can easily be used in a standardized, systematic and controllable manner to study the role of specific pathways and processes in the genesis, perpetuation and termination of atrial arrhythmias. In this review, we provide an overview of the currently available two- and three-dimensional multicellular in vitro systems for investigating the initiation, maintenance and termination of atrial arrhythmias and AF. This encompasses cultures of primary (animal-derived) atrial cardiomyocytes (CMs), pluripotent stem cell-derived atrial-like CMs and (conditionally) immortalized atrial CMs. The strengths and weaknesses of each of these model systems for studying atrial arrhythmias will be discussed as well as their implications for future studies.
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Affiliation(s)
| | | | | | - Antoine A. F. de Vries
- Laboratory of Experimental Cardiology, Department of Cardiology, Leiden University Medical Center, Leiden, Netherlands
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50
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Abstract
Atrial fibrillation has been identified to be associated with disordered gut microbiota. Notably, atrial fibrillation is a progressive disease and could be categorized as paroxysmal and persistent based on the duration of the episodes. The persistent atrial fibrillation patients are accompanied by higher risk of stroke and lower success rate of rhythm control. However, the microbial signatures of different categories of atrial fibrillation patients remain unknown. We sought to determine whether disordered gut microbiota occurs in the self-terminating PAF or intestinal flora develops dynamically during atrial fibrillation progression. We found that different types of atrial fibrillation show a limited degree of gut microbiota shift. Gut microbiota dysbiosis has already occurred in mild stages of atrial fibrillation, which might act as an early modulator of disease, and therefore may be regarded as a potential target to postpone atrial fibrillation progression. Dysbiotic gut microbiota (GM) and disordered metabolic patterns are known to be involved in the clinical expression of atrial fibrillation (AF). However, little evidence has been reported in characterizing the specific changes in fecal microbiota in paroxysmal AF (PAF) and persistent AF (psAF). To provide a comprehensive understanding of GM dysbiosis in AF types, we assessed the GM signatures of 30 PAF patients, 20 psAF patients, and 50 non-AF controls based on metagenomic and metabolomic analyses. Compared with control subjects, similar changes of GM were identified in PAF and psAF patients, with elevated microbial diversity and similar alteration in the microbiota composition. PAF and psAF patients shared the majority of differential taxa compared with non-AF controls. Moreover, the similarity was also illuminated in microbial function and associated metabolic alterations. Additionally, minor disparity was observed in PAF compared with psAF. Several distinctive taxa between PAF and psAF were correlated with certain metabolites and atrial diameter, which might play a role in the pathogenesis of atrial remodeling. Our findings characterized the presence of many common features in GM shared by PAF and psAF, which occurred at the self-terminating PAF. Preventative and therapeutic measures targeting GM for early intervention to postpone the progression of AF are highly warranted. IMPORTANCE Atrial fibrillation has been identified to be associated with disordered gut microbiota. Notably, atrial fibrillation is a progressive disease and could be categorized as paroxysmal and persistent based on the duration of the episodes. The persistent atrial fibrillation patients are accompanied by higher risk of stroke and lower success rate of rhythm control. However, the microbial signatures of different categories of atrial fibrillation patients remain unknown. We sought to determine whether disordered gut microbiota occurs in the self-terminating PAF or intestinal flora develops dynamically during atrial fibrillation progression. We found that different types of atrial fibrillation show a limited degree of gut microbiota shift. Gut microbiota dysbiosis has already occurred in mild stages of atrial fibrillation, which might act as an early modulator of disease, and therefore may be regarded as a potential target to postpone atrial fibrillation progression.
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