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Ma C, Wu S, Liu S, Han Y. Chinese guidelines for the diagnosis and management of atrial fibrillation. Pacing Clin Electrophysiol 2024; 47:714-770. [PMID: 38687179 DOI: 10.1111/pace.14920] [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: 11/22/2023] [Accepted: 11/30/2023] [Indexed: 05/02/2024]
Abstract
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia, significantly impacting patients' quality of life and increasing the risk of death, stroke, heart failure, and dementia. Over the past two decades, there have been significant breakthroughs in AF risk prediction and screening, stroke prevention, rhythm control, catheter ablation, and integrated management. During this period, the scale, quality, and experience of AF management in China have greatly improved, providing a solid foundation for the development of the guidelines for the diagnosis and management of AF. To further promote standardized AF management, and apply new technologies and concepts to clinical practice timely and fully, the Chinese Society of Cardiology of Chinese Medical Association and the Heart Rhythm Committee of Chinese Society of Biomedical Engineering jointly developed the Chinese Guidelines for the Diagnosis and Management of Atrial Fibrillation. The guidelines comprehensively elaborated on various aspects of AF management and proposed the CHA2DS2‑VASc‑60 stroke risk score based on the characteristics of the Asian AF population. The guidelines also reevaluated the clinical application of AF screening, emphasized the significance of early rhythm control, and highlighted the central role of catheter ablation in rhythm control.
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Affiliation(s)
- Changsheng Ma
- Chinese Society of Cardiology, Chinese Medical Association, Heart Rhythm Committee of Chinese Society of Biomedical Engineering, Beijing, China
| | - Shulin Wu
- Chinese Society of Cardiology, Chinese Medical Association, Heart Rhythm Committee of Chinese Society of Biomedical Engineering, Beijing, China
| | - Shaowen Liu
- Chinese Society of Cardiology, Chinese Medical Association, Heart Rhythm Committee of Chinese Society of Biomedical Engineering, Beijing, China
| | - Yaling Han
- Chinese Society of Cardiology, Chinese Medical Association, Heart Rhythm Committee of Chinese Society of Biomedical Engineering, Beijing, China
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MA CS, WU SL, LIU SW, HAN YL. Chinese Guidelines for the Diagnosis and Management of Atrial Fibrillation. J Geriatr Cardiol 2024; 21:251-314. [PMID: 38665287 PMCID: PMC11040055 DOI: 10.26599/1671-5411.2024.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024] Open
Abstract
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia, significantly impacting patients' quality of life and increasing the risk of death, stroke, heart failure, and dementia. Over the past two decades, there have been significant breakthroughs in AF risk prediction and screening, stroke prevention, rhythm control, catheter ablation, and integrated management. During this period, the scale, quality, and experience of AF management in China have greatly improved, providing a solid foundation for the development of guidelines for the diagnosis and management of AF. To further promote standardized AF management, and apply new technologies and concepts to clinical practice in a timely and comprehensive manner, the Chinese Society of Cardiology of the Chinese Medical Association and the Heart Rhythm Committee of the Chinese Society of Biomedical Engineering have jointly developed the Chinese Guidelines for the Diagnosis and Management of Atrial Fibrillation. The guidelines have comprehensively elaborated on various aspects of AF management and proposed the CHA2DS2-VASc-60 stroke risk score based on the characteristics of AF in the Asian population. The guidelines have also reevaluated the clinical application of AF screening, emphasized the significance of early rhythm control, and highlighted the central role of catheter ablation in rhythm control.
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Olleik F, Kamareddine MH, Spears J, Tse G, Liu T, Yan GX. Mexiletine: Antiarrhythmic mechanisms, emerging clinical applications and mortality. Pacing Clin Electrophysiol 2023; 46:1348-1356. [PMID: 37846818 DOI: 10.1111/pace.14846] [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: 07/30/2023] [Revised: 09/19/2023] [Accepted: 10/07/2023] [Indexed: 10/18/2023]
Abstract
Mexiletine, a class Ib antiarrhythmic drug, exhibits its major antiarrhythmic effect via inhibition of the fast and late Na+ currents in myocardial tissues that are dependent on the opening of Na+ channels for their excitation. Through a comprehensive examination of mexiletine's therapeutic benefits and potential risks, we aim to provide valuable insights that reinforce its role as a vital therapeutic option for patients with ventricular arrhythmias, long QT syndrome, and other heart rhythm disorders. This review will highlight the current understandings of the antiarrhythmic effects and rationales for recent off-label use and address the mortality and proarrhythmic effects of mexiletine utilizing published basic and clinical studies over the past five decades.
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Affiliation(s)
- Farah Olleik
- Lankenau Medical Center and Lankenau Institute for Medical Research, Wynnewood, Pennsylvania, USA
| | | | - Jenna Spears
- Lankenau Medical Center and Lankenau Institute for Medical Research, Wynnewood, Pennsylvania, USA
| | - Gary Tse
- Tianjin Key Laboratory of Ion-Molecular Function of Cardiovascular Disease, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, PR China
- Kent and Medway Medical School, Canterbury, Kent, UK
- School of Nursing and Health Studies, Hong Kong Metropolitan University, Hong Kong, PR China
| | - Tong Liu
- Tianjin Key Laboratory of Ion-Molecular Function of Cardiovascular Disease, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, PR China
| | - Gan-Xin Yan
- Lankenau Medical Center and Lankenau Institute for Medical Research, Wynnewood, Pennsylvania, USA
- Fuwai Huazhong Hospital, Chinese Academy of Medical Sciences, Zhengzhou, PR China
- Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
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Sun Y, Wang L, Que Y, Zhu H, Yang X, Li D. Ventricular repolarization dynamics in arsenic trioxide treatment of acute promyelocytic leukemia. Int J Cardiol 2019; 306:163-167. [PMID: 31761398 DOI: 10.1016/j.ijcard.2019.11.099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 09/24/2019] [Accepted: 11/11/2019] [Indexed: 12/20/2022]
Abstract
BACKGROUND Arsenic trioxide is the first-line treatment for acute promyelocytic leukemia (APL); however, abnormalities of ventricular repolarization and QT interval prolongation are the most common adverse effects. We explore ventricular repolarization dynamic changes and the influence of clinical factors in APL patients during arsenic trioxide induction therapy. METHODS APL patients receiving arsenic trioxide induction therapy were included. Arsenic trioxide effects on ventricular repolarization-related indicators such as QTc, QT interval dispersion (QTd), heart rate-corrected J to T-peak (JTpC), and T-peak to T-end covariate (TpTec) interphase were statistically analyzed. Furthermore, logistic regression analysis was conducted to explore the correlation between various clinical factors and changes in repolarization indexes. RESULTS Ninety-three patients were recruited finally. Seven patients with QTc > 500 ms after arsenic trioxide treatment were discontinued from the study. QTc, QTd and JTpC interphase prolonged on day 8; TpTec prolongation was observed at the late induction stage. The risk factors were disease risk, hemoglobin and lactate dehydrogenase for QTc; hemoglobin for QTd; disease risk and hemoglobin for JTpC and TpTec. CONCLUSION QTc, QTd and JTpC were prolonged in the early use of arsenic trioxide and in contrast with TpTec. Hypothrombinemia was a common risk factor of ventricular repolarization prolongation and should be considered in preventing cardiac adverse effects of arsenic trioxide in APL patients.
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Affiliation(s)
- Yinan Sun
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Lu Wang
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yimei Que
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Hongling Zhu
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xiaoyun Yang
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Dengju Li
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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Hu RM, Tester DJ, Li R, Sun T, Peterson BZ, Ackerman MJ, Makielski JC, Tan BH. Mexiletine rescues a mixed biophysical phenotype of the cardiac sodium channel arising from the SCN5A mutation, N406K, found in LQT3 patients. Channels (Austin) 2019; 12:176-186. [PMID: 29983085 PMCID: PMC6104686 DOI: 10.1080/19336950.2018.1475794] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Introduction: Individual mutations in the SCN5A-encoding cardiac sodium channel α-subunit usually cause a single cardiac arrhythmia disorder, some cause mixed biophysical or clinical phenotypes. Here we report an infant, female patient harboring a N406K mutation in SCN5A with a marked and mixed biophysical phenotype and assess pathogenic mechanisms. Methods and Results: A patient suffered from recurrent seizures during sleep and torsades de pointes with a QTc of 530 ms. Mutational analysis identified a N406K mutation in SCN5A. The mutation was engineered by site-directed mutagenesis and heterologously expressed in HEK293 cells. After 48 hours incubation with and without mexiletine, macroscopic voltage-gated sodium current (INa) was measured with standard whole-cell patch clamp techniques. SCN5A-N406K elicited both a significantly decreased peak INa and a significantly increased late INa compared to wide-type (WT) channels. Furthermore, mexiletine both restored the decreased peak INa of the mutant channel and inhibited the increased late INa of the mutant channel. Conclusion: SCN5A-N406K channel displays both “gain-of-function” in late INa and “loss-of-function” in peak INa density contributing to a mixed biophysical phenotype. Moreover, our finding may provide the first example that mexiletine exerts a dual rescue of both “gain-of-function” and “loss-of-function” of the mutant sodium channel.
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Affiliation(s)
- Rou-Mu Hu
- a Heart Center & Beijing Key Laboratory of Hypertension, Beijing Chaoyang Hospital , Capital Medical University , Beijing , China.,b Division of Cardiovascular Medicine, Department of Medicine , University of Wisconsin , Madison , Wisconsin , USA
| | - David J Tester
- c Departments of Medicine, Pediatrics, and Molecular Pharmacology and Experimental Therapeutics , Mayo Clinic , Rochester , MN , USA
| | - Ryan Li
- d Departments of Pediatrics, and Cellular & Molecular Physiology , Pennsylvania State University College of Medicine , Hershey , PA , USA
| | - Tianyu Sun
- d Departments of Pediatrics, and Cellular & Molecular Physiology , Pennsylvania State University College of Medicine , Hershey , PA , USA
| | - Blaise Z Peterson
- d Departments of Pediatrics, and Cellular & Molecular Physiology , Pennsylvania State University College of Medicine , Hershey , PA , USA
| | - Michael J Ackerman
- c Departments of Medicine, Pediatrics, and Molecular Pharmacology and Experimental Therapeutics , Mayo Clinic , Rochester , MN , USA
| | - Jonathan C Makielski
- b Division of Cardiovascular Medicine, Department of Medicine , University of Wisconsin , Madison , Wisconsin , USA
| | - Bi-Hua Tan
- b Division of Cardiovascular Medicine, Department of Medicine , University of Wisconsin , Madison , Wisconsin , USA.,d Departments of Pediatrics, and Cellular & Molecular Physiology , Pennsylvania State University College of Medicine , Hershey , PA , USA
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Wolbrette DL, Hussain S, Maraj I, Naccarelli GV. A Quarter of a Century Later: What is Dofetilide’s Clinical Role Today? J Cardiovasc Pharmacol Ther 2018; 24:3-10. [DOI: 10.1177/1074248418784288] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Dofetilide is a class III antiarrhythmic agent approved by the Food and Drug Administration for the conversion of atrial fibrillation and atrial flutter and maintenance of sinus rhythm in symptomatic patients with persistent arrhythmia. Drug trials showed neutral mortality in post–myocardial infarction patients and those with heart failure. This is a review of postmarket data, including real-world efficacy and safety in a variety of populations. Dofetilide has been used off-label with success in patients with paroxysmal atrial fibrillation and atrial flutter, as well as atrial tachycardia and ventricular tachycardia. The real-world acute conversion rate of atrial fibrillation and atrial flutter is higher than that reported in clinical trials. Dofetilide has an acceptable safety profile when initiated (or reloaded) under hospital monitoring and dosed according to creatinine clearance. Dofetilide is well tolerated and a good choice for patients with acceptable renal function and a normal QT interval, especially if atrioventricular nodal blockade needs to be avoided.
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Affiliation(s)
- Deborah L. Wolbrette
- Heart and Vascular Institute, Penn State University College of Medicine, The Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Sarah Hussain
- Heart and Vascular Institute, Penn State University College of Medicine, The Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Ilir Maraj
- Heart and Vascular Institute, Penn State University College of Medicine, The Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Gerald V. Naccarelli
- Heart and Vascular Institute, Penn State University College of Medicine, The Milton S. Hershey Medical Center, Hershey, PA, USA
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