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Kukendrarajah K, Ahmad M, Carrington M, Ioannou A, Taylor J, Razvi Y, Papageorgiou N, Mead GE, Nevis IF, D'Ascenzo F, Wilton SB, Lambiase PD, Morillo CA, Kwong JS, Providencia R. External electrical and pharmacological cardioversion for atrial fibrillation, atrial flutter or atrial tachycardias: a network meta-analysis. Cochrane Database Syst Rev 2024; 6:CD013255. [PMID: 38828867 PMCID: PMC11145740 DOI: 10.1002/14651858.cd013255.pub2] [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] [Indexed: 06/05/2024]
Abstract
BACKGROUND Atrial fibrillation (AF) is the most frequent sustained arrhythmia. Cardioversion is a rhythm control strategy to restore normal/sinus rhythm, and can be achieved through drugs (pharmacological) or a synchronised electric shock (electrical cardioversion). OBJECTIVES To assess the efficacy and safety of pharmacological and electrical cardioversion for atrial fibrillation (AF), atrial flutter and atrial tachycardias. SEARCH METHODS We searched CENTRAL, MEDLINE, Embase, Conference Proceedings Citation Index-Science (CPCI-S) and three trials registers (ClinicalTrials.gov, WHO ICTRP and ISRCTN) on 14 February 2023. SELECTION CRITERIA We included randomised controlled trials (RCTs) at the individual patient level. Patient populations were aged ≥ 18 years with AF of any type and duration, atrial flutter or other sustained related atrial arrhythmias, not occurring as a result of reversible causes. DATA COLLECTION AND ANALYSIS We used standard Cochrane methodology to collect data and performed a network meta-analysis using the standard frequentist graph-theoretical approach using the netmeta package in R. We used GRADE to assess the quality of the evidence which we presented in our summary of findings with a judgement on certainty. We calculated differences using risk ratios (RR) and 95% confidence intervals (CI) as well as ranking treatments using a P value. We assessed clinical and statistical heterogeneity and split the networks for the primary outcome and acute procedural success, due to concerns about violating the transitivity assumption. MAIN RESULTS We included 112 RCTs (139 records), from which we pooled data from 15,968 patients. The average age ranged from 47 to 72 years and the proportion of male patients ranged from 38% to 92%. Seventy-nine trials were considered to be at high risk of bias for at least one domain, 32 had no high risk of bias domains, but had at least one domain classified as uncertain risk, and one study was considered at low risk for all domains. For paroxysmal AF (35 trials), when compared to placebo, anteroapical (AA)/anteroposterior (AP) biphasic truncated exponential waveform (BTE) cardioversion (RR: 2.42; 95% CI 1.65 to 3.56), quinidine (RR: 2.23; 95% CI 1.49 to 3.34), ibutilide (RR: 2.00; 95% CI 1.28 to 3.12), propafenone (RR: 1.98; 95% CI 1.67 to 2.34), amiodarone (RR: 1.69; 95% CI 1.42 to 2.02), sotalol (RR: 1.58; 95% CI 1.08 to 2.31) and procainamide (RR: 1.49; 95% CI 1.13 to 1.97) likely result in a large increase in maintenance of sinus rhythm until hospital discharge or end of study follow-up (certainty of evidence: moderate). The effect size was larger for AA/AP incremental and was progressively smaller for the subsequent interventions. Despite low certainty of evidence, antazoline may result in a large increase (RR: 28.60; 95% CI 1.77 to 461.30) in this outcome. Similarly, low-certainty evidence suggests a large increase in this outcome for flecainide (RR: 2.17; 95% CI 1.68 to 2.79), vernakalant (RR: 2.13; 95% CI 1.52 to 2.99), and magnesium (RR: 1.73; 95% CI 0.79 to 3.79). For persistent AF (26 trials), one network was created for electrical cardioversion and showed that, when compared to AP BTE incremental energy with patches, AP BTE maximum energy with patches (RR 1.35, 95% CI 1.17 to 1.55) likely results in a large increase, and active compression AP BTE incremental energy with patches (RR: 1.14, 95% CI 1.00 to 1.131) likely results in an increase in maintenance of sinus rhythm at hospital discharge or end of study follow-up (certainty of evidence: high). Use of AP BTE incremental with paddles (RR: 1.03, 95% CI 0.98 to 1.09; certainty of evidence: low) may lead to a slight increase, and AP MDS Incremental paddles (RR: 0.95, 95% CI 0.86 to 1.05; certainty of evidence: low) may lead to a slight decrease in efficacy. On the other hand, AP MDS incremental energy using patches (RR: 0.78, 95% CI 0.70 to 0.87), AA RBW incremental energy with patches (RR: 0.76, 95% CI 0.66 to 0.88), AP RBW incremental energy with patches (RR: 0.76, 95% CI 0.68 to 0.86), AA MDS incremental energy with patches (RR: 0.76, 95% CI 0.67 to 0.86) and AA MDS incremental energy with paddles (RR: 0.68, 95% CI 0.53 to 0.83) probably result in a decrease in this outcome when compared to AP BTE incremental energy with patches (certainty of evidence: moderate). The network for pharmacological cardioversion showed that bepridil (RR: 2.29, 95% CI 1.26 to 4.17) and quindine (RR: 1.53, (95% CI 1.01 to 2.32) probably result in a large increase in maintenance of sinus rhythm at hospital discharge or end of study follow-up when compared to amiodarone (certainty of evidence: moderate). Dofetilide (RR: 0.79, 95% CI 0.56 to 1.44), sotalol (RR: 0.89, 95% CI 0.67 to 1.18), propafenone (RR: 0.79, 95% CI 0.50 to 1.25) and pilsicainide (RR: 0.39, 95% CI 0.02 to 7.01) may result in a reduction in this outcome when compared to amiodarone, but the certainty of evidence is low. For atrial flutter (14 trials), a network could be created only for antiarrhythmic drugs. Using placebo as the common comparator, ibutilide (RR: 21.45, 95% CI 4.41 to 104.37), propafenone (RR: 7.15, 95% CI 1.27 to 40.10), dofetilide (RR: 6.43, 95% CI 1.38 to 29.91), and sotalol (RR: 6.39, 95% CI 1.03 to 39.78) probably result in a large increase in the maintenance of sinus rhythm at hospital discharge or end of study follow-up (certainty of evidence: moderate), and procainamide (RR: 4.29, 95% CI 0.63 to 29.03), flecainide (RR 3.57, 95% CI 0.24 to 52.30) and vernakalant (RR: 1.18, 95% CI 0.05 to 27.37) may result in a large increase in maintenance of sinus rhythm at hospital discharge or end of study follow-up (certainty of evidence: low). All tested electrical cardioversion strategies for atrial flutter had very high efficacy (97.9% to 100%). The rate of mortality (14 deaths) and stroke or systemic embolism (3 events) at 30 days was extremely low. Data on quality of life were scarce and of uncertain clinical significance. No information was available regarding heart failure readmissions. Data on duration of hospitalisation was scarce, of low quality, and could not be pooled. AUTHORS' CONCLUSIONS Despite the low quality of evidence, this systematic review provides important information on electrical and pharmacological strategies to help patients and physicians deal with AF and atrial flutter. In the assessment of the patient comorbidity profile, antiarrhythmic drug onset of action and side effect profile versus the need for a physician with experience in sedation, or anaesthetics support for electrical cardioversion are key aspects when choosing the cardioversion method.
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Affiliation(s)
| | - Mahmood Ahmad
- Department of Cardiology, Royal Free Hospital, Royal Free London NHS Foundation Trust, London, UK
| | | | - Adam Ioannou
- Royal Free London NHS Foundation Trust, London, UK
| | - Julie Taylor
- Institute of Health Informatics Research, University College London, London, UK
| | - Yousuf Razvi
- Department of Cardiology, Royal Free Hospital, London, UK
| | | | - Gillian E Mead
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Immaculate F Nevis
- Health Economics and Outcomes Research, ICON plc, Blue Bell, Philadelphia, USA
| | - Fabrizio D'Ascenzo
- Division of Cardiology, Department of Internal Medicine, University of Turin, Turin, Italy
| | - Stephen B Wilton
- Libin Cardiovascular Institute, University of Calgary, Calgary, Canada
| | - Pier D Lambiase
- Centre for Cardiology in the Young, The Heart Hospital, University College London Hospitals, London, UK
| | - Carlos A Morillo
- Department of Cardiac Sciences, Cumming School of Medicine, Foothills Medical Centre, Calgary, Canada
| | - Joey Sw Kwong
- Global Health Nursing, Graduate School of Nursing Science, St. Luke's International University, Tokyo, Japan
| | - Rui Providencia
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, UK
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Joglar JA, Chung MK, Armbruster AL, Benjamin EJ, Chyou JY, Cronin EM, Deswal A, Eckhardt LL, Goldberger ZD, Gopinathannair R, Gorenek B, Hess PL, Hlatky M, Hogan G, Ibeh C, Indik JH, Kido K, Kusumoto F, Link MS, Linta KT, Marcus GM, McCarthy PM, Patel N, Patton KK, Perez MV, Piccini JP, Russo AM, Sanders P, Streur MM, Thomas KL, Times S, Tisdale JE, Valente AM, Van Wagoner DR. 2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation 2024; 149:e1-e156. [PMID: 38033089 PMCID: PMC11095842 DOI: 10.1161/cir.0000000000001193] [Citation(s) in RCA: 76] [Impact Index Per Article: 76.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
AIM The "2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of Atrial Fibrillation" provides recommendations to guide clinicians in the treatment of patients with atrial fibrillation. METHODS A comprehensive literature search was conducted from May 12, 2022, to November 3, 2022, encompassing studies, reviews, and other evidence conducted on human subjects that were published in English from PubMed, EMBASE, the Cochrane Library, the Agency for Healthcare Research and Quality, and other selected databases relevant to this guideline. Additional relevant studies, published through November 2022, during the guideline writing process, were also considered by the writing committee and added to the evidence tables, where appropriate. STRUCTURE Atrial fibrillation is the most sustained common arrhythmia, and its incidence and prevalence are increasing in the United States and globally. Recommendations from the "2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation" and the "2019 AHA/ACC/HRS Focused Update of the 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation" have been updated with new evidence to guide clinicians. In addition, new recommendations addressing atrial fibrillation and thromboembolic risk assessment, anticoagulation, left atrial appendage occlusion, atrial fibrillation catheter or surgical ablation, and risk factor modification and atrial fibrillation prevention have been developed.
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Affiliation(s)
| | | | | | | | | | | | - Anita Deswal
- ACC/AHA Joint Committee on Clinical Practice Guidelines liaison
| | | | | | | | | | - Paul L Hess
- ACC/AHA Joint Committee on Performance Measures liaison
| | | | | | | | | | - Kazuhiko Kido
- American College of Clinical Pharmacy representative
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Joglar JA, Chung MK, Armbruster AL, Benjamin EJ, Chyou JY, Cronin EM, Deswal A, Eckhardt LL, Goldberger ZD, Gopinathannair R, Gorenek B, Hess PL, Hlatky M, Hogan G, Ibeh C, Indik JH, Kido K, Kusumoto F, Link MS, Linta KT, Marcus GM, McCarthy PM, Patel N, Patton KK, Perez MV, Piccini JP, Russo AM, Sanders P, Streur MM, Thomas KL, Times S, Tisdale JE, Valente AM, Van Wagoner DR. 2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. J Am Coll Cardiol 2024; 83:109-279. [PMID: 38043043 PMCID: PMC11104284 DOI: 10.1016/j.jacc.2023.08.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2023]
Abstract
AIM The "2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of Patients With Atrial Fibrillation" provides recommendations to guide clinicians in the treatment of patients with atrial fibrillation. METHODS A comprehensive literature search was conducted from May 12, 2022, to November 3, 2022, encompassing studies, reviews, and other evidence conducted on human subjects that were published in English from PubMed, EMBASE, the Cochrane Library, the Agency for Healthcare Research and Quality, and other selected databases relevant to this guideline. Additional relevant studies, published through November 2022, during the guideline writing process, were also considered by the writing committee and added to the evidence tables, where appropriate. STRUCTURE Atrial fibrillation is the most sustained common arrhythmia, and its incidence and prevalence are increasing in the United States and globally. Recommendations from the "2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation" and the "2019 AHA/ACC/HRS Focused Update of the 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation" have been updated with new evidence to guide clinicians. In addition, new recommendations addressing atrial fibrillation and thromboembolic risk assessment, anticoagulation, left atrial appendage occlusion, atrial fibrillation catheter or surgical ablation, and risk factor modification and atrial fibrillation prevention have been developed.
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Um KJ, McIntyre WF, Mendoza PA, Ibrahim O, Nguyen ST, Lin SH, Duceppe E, Rochwerg B, Healey JS, Koziarz A, Lengyel AP, Bhatnagar A, Amit G, Chu VA, Whitlock RP, Belley-Côté EP. Pre-treatment with antiarrhythmic drugs for elective electrical cardioversion of atrial fibrillation: a systematic review and network meta-analysis. Europace 2022; 24:1548-1559. [PMID: 35654763 DOI: 10.1093/europace/euac063] [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: 07/29/2021] [Accepted: 04/09/2022] [Indexed: 11/12/2022] Open
Abstract
AIMS Our objective was to compare the efficacy of pre-treatment with different classes of anti-arrhythmic drugs (AADs) in patients with atrial fibrillation (AF) undergoing electrical cardioversion. METHODS AND RESULTS We performed a systematic review and network meta-analysis (NMA) of randomized controlled trials (RCTs) comparing different AADs in patients with AF undergoing electrical cardioversion. We grouped AADs into five network nodes: no treatment or rate control, Class Ia, Class Ic, Class III, and amiodarone. Outcomes were (i) acute restoration and (ii) maintenance of sinus rhythm. We searched MEDLINE and EMBASE from inception until June 2020. We used Python 3.8.3 and R 3.6.2 for data analysis. We evaluated the overall certainty of evidence with the GRADE framework. We included 28 RCTs. Compared with no treatment or rate control, Class III AADs [odds ratio (OR): 2.41; 95% credible interval (CrI): 1.37 to 4.62, high certainty] and amiodarone (OR: 2.58; 95% CrI: 1.54 to 4.37, high certainty) improved restoration of sinus rhythm. Amiodarone improved long-term maintenance of sinus rhythm when compared with no treatment or rate control (OR: 5.37; 95% CrI: 4.00-7.39, high certainty), Class Ic (OR: 1.89; 95% CrI: 1.05-3.45, moderate certainty) and Class III AADs (OR: 2.19; 95% CrI: 1.39-3.26, high certainty). CONCLUSION Before electrical cardioversion of AF, treatment with Class III AADs or amiodarone improves the acute restoration of sinus rhythm. Amiodarone is most likely to improve the maintenance of sinus rhythm after electrical cardioversion, but Class Ic and Class III AADs are also effective.
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Affiliation(s)
- Kevin J Um
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada.,Population Health Research Institute, Hamilton, ON L8L 2X2, Canada
| | - William F McIntyre
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada.,Population Health Research Institute, Hamilton, ON L8L 2X2, Canada
| | - Pablo A Mendoza
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Omar Ibrahim
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada.,Population Health Research Institute, Hamilton, ON L8L 2X2, Canada
| | - Stephanie T Nguyen
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Sabrina H Lin
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Emmanuelle Duceppe
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada.,Population Health Research Institute, Hamilton, ON L8L 2X2, Canada
| | - Bram Rochwerg
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Jeff S Healey
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada.,Population Health Research Institute, Hamilton, ON L8L 2X2, Canada
| | - Alex Koziarz
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Alexandra P Lengyel
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Akash Bhatnagar
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Guy Amit
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Victor A Chu
- University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Richard P Whitlock
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada.,Population Health Research Institute, Hamilton, ON L8L 2X2, Canada
| | - Emilie P Belley-Côté
- McMaster University, David Braley Cardiac, Vascular, and Stroke Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada.,Population Health Research Institute, Hamilton, ON L8L 2X2, Canada
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Hindricks G, Potpara T, Dagres N, Arbelo E, Bax JJ, Blomström-Lundqvist C, Boriani G, Castella M, Dan GA, Dilaveris PE, Fauchier L, Filippatos G, Kalman JM, Meir ML, Lane DA, Lebeau JP, Lettino M, Lip GY, Pinto FJ, Neil Thomas G, Valgimigli M, Van Gelder IC, Van Putte BP, Watkins CL. Guía ESC 2020 sobre el diagnóstico y tratamiento de la fibrilación auricular, desarrollada en colaboración de la European Association of Cardio-Thoracic Surgery (EACTS). Rev Esp Cardiol 2021. [DOI: 10.1016/j.recesp.2020.10.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hindricks G, Potpara T, Dagres N, Arbelo E, Bax JJ, Blomström-Lundqvist C, Boriani G, Castella M, Dan GA, Dilaveris PE, Fauchier L, Filippatos G, Kalman JM, La Meir M, Lane DA, Lebeau JP, Lettino M, Lip GYH, Pinto FJ, Thomas GN, Valgimigli M, Van Gelder IC, Van Putte BP, Watkins CL. 2020 ESC Guidelines for the diagnosis and management of atrial fibrillation developed in collaboration with the European Association for Cardio-Thoracic Surgery (EACTS): The Task Force for the diagnosis and management of atrial fibrillation of the European Society of Cardiology (ESC) Developed with the special contribution of the European Heart Rhythm Association (EHRA) of the ESC. Eur Heart J 2021; 42:373-498. [PMID: 32860505 DOI: 10.1093/eurheartj/ehaa612] [Citation(s) in RCA: 4871] [Impact Index Per Article: 1623.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Valembois L, Audureau E, Takeda A, Jarzebowski W, Belmin J, Lafuente‐Lafuente C. Antiarrhythmics for maintaining sinus rhythm after cardioversion of atrial fibrillation. Cochrane Database Syst Rev 2019; 9:CD005049. [PMID: 31483500 PMCID: PMC6738133 DOI: 10.1002/14651858.cd005049.pub5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Atrial fibrillation is the most frequent sustained arrhythmia. Atrial fibrillation often recurs after restoration of normal sinus rhythm. Antiarrhythmic drugs have been widely used to prevent recurrence. This is an update of a review previously published in 2006, 2012 and 2015. OBJECTIVES To determine the effects of long-term treatment with antiarrhythmic drugs on death, stroke, drug adverse effects and recurrence of atrial fibrillation in people who had recovered sinus rhythm after having atrial fibrillation. SEARCH METHODS We updated the searches of CENTRAL, MEDLINE and Embase in January 2019, and ClinicalTrials.gov and WHO ICTRP in February 2019. We checked the reference lists of retrieved articles, recent reviews and meta-analyses. SELECTION CRITERIA Two authors independently selected randomised controlled trials (RCTs) comparing any antiarrhythmic drug with a control (no treatment, placebo, drugs for rate control) or with another antiarrhythmic drug in adults who had atrial fibrillation and in whom sinus rhythm was restored, spontaneously or by any intervention. We excluded postoperative atrial fibrillation. DATA COLLECTION AND ANALYSIS Two authors independently assessed quality and extracted data. We pooled studies, if appropriate, using Mantel-Haenszel risk ratios (RR), with 95% confidence intervals (CI). All results were calculated at one year of follow-up or the nearest time point. MAIN RESULTS This update included one new study (100 participants) and excluded one previously included study because of double publication. Finally, we included 59 RCTs comprising 20,981 participants studying quinidine, disopyramide, propafenone, flecainide, metoprolol, amiodarone, dofetilide, dronedarone and sotalol. Overall, mean follow-up was 10.2 months.All-cause mortalityHigh-certainty evidence from five RCTs indicated that treatment with sotalol was associated with a higher all-cause mortality rate compared with placebo or no treatment (RR 2.23, 95% CI 1.03 to 4.81; participants = 1882). The number need to treat for an additional harmful outcome (NNTH) for sotalol was 102 participants treated for one year to have one additional death. Low-certainty evidence from six RCTs suggested that risk of mortality may be higher in people taking quinidine (RR 2.01, 95% CI 0.84 to 4.77; participants = 1646). Moderate-certainty evidence showed increased RR for mortality but with very wide CIs for metoprolol (RR 2.02, 95% CI 0.37 to 11.05, 2 RCTs, participants = 562) and amiodarone (RR 1.66, 95% CI 0.55 to 4.99, 2 RCTs, participants = 444), compared with placebo.We found little or no difference in mortality with dofetilide (RR 0.98, 95% CI 0.76 to 1.27; moderate-certainty evidence) or dronedarone (RR 0.86, 95% CI 0.68 to 1.09; high-certainty evidence) compared to placebo/no treatment. There were few data on mortality for disopyramide, flecainide and propafenone, making impossible a reliable estimation for those drugs.Withdrawals due to adverse eventsAll analysed drugs increased withdrawals due to adverse effects compared to placebo or no treatment (quinidine: RR 1.56, 95% CI 0.87 to 2.78; disopyramide: RR 3.68, 95% CI 0.95 to 14.24; propafenone: RR 1.62, 95% CI 1.07 to 2.46; flecainide: RR 15.41, 95% CI 0.91 to 260.19; metoprolol: RR 3.47, 95% CI 1.48 to 8.15; amiodarone: RR 6.70, 95% CI 1.91 to 23.45; dofetilide: RR 1.77, 95% CI 0.75 to 4.18; dronedarone: RR 1.58, 95% CI 1.34 to 1.85; sotalol: RR 1.95, 95% CI 1.23 to 3.11). Certainty of the evidence for this outcome was low for disopyramide, amiodarone, dofetilide and flecainide; moderate to high for the remaining drugs.ProarrhythmiaVirtually all studied antiarrhythmics showed increased proarrhythmic effects (counting both tachyarrhythmias and bradyarrhythmias attributable to treatment) (quinidine: RR 2.05, 95% CI 0.95 to 4.41; disopyramide: no data; flecainide: RR 4.80, 95% CI 1.30 to 17.77; metoprolol: RR 18.14, 95% CI 2.42 to 135.66; amiodarone: RR 2.22, 95% CI 0.71 to 6.96; dofetilide: RR 5.50, 95% CI 1.33 to 22.76; dronedarone: RR 1.95, 95% CI 0.77 to 4.98; sotalol: RR 3.55, 95% CI 2.16 to 5.83); with the exception of propafenone (RR 1.32, 95% CI 0.39 to 4.47) for which the certainty of evidence was very low and we were uncertain about the effect. Certainty of the evidence for this outcome for the other drugs was moderate to high.StrokeEleven studies reported stroke outcomes with quinidine, disopyramide, flecainide, amiodarone, dronedarone and sotalol. High-certainty evidence from two RCTs suggested that dronedarone may be associated with reduced risk of stroke (RR 0.66, 95% CI 0.47 to 0.95; participants = 5872). This result is attributed to one study dominating the meta-analysis and has yet to be reproduced in other studies. There was no apparent effect on stroke rates with the other antiarrhythmics.Recurrence of atrial fibrillationModerate- to high-certainty evidence, with the exception of disopyramide which was low-certainty evidence, showed that all analysed drugs, including metoprolol, reduced recurrence of atrial fibrillation (quinidine: RR 0.83, 95% CI 0.78 to 0.88; disopyramide: RR 0.77, 95% CI 0.59 to 1.01; propafenone: RR 0.67, 95% CI 0.61 to 0.74; flecainide: RR 0.65, 95% CI 0.55 to 0.77; metoprolol: RR 0.83 95% CI 0.68 to 1.02; amiodarone: RR 0.52, 95% CI 0.46 to 0.58; dofetilide: RR 0.72, 95% CI 0.61 to 0.85; dronedarone: RR 0.85, 95% CI 0.80 to 0.91; sotalol: RR 0.83, 95% CI 0.80 to 0.87). Despite this reduction, atrial fibrillation still recurred in 43% to 67% of people treated with antiarrhythmics. AUTHORS' CONCLUSIONS There is high-certainty evidence of increased mortality associated with sotalol treatment, and low-certainty evidence suggesting increased mortality with quinidine, when used for maintaining sinus rhythm in people with atrial fibrillation. We found few data on mortality in people taking disopyramide, flecainide and propafenone, so it was not possible to make a reliable estimation of the mortality risk for these drugs. However, we did find moderate-certainty evidence of marked increases in proarrhythmia and adverse effects with flecainide.Overall, there is evidence showing that antiarrhythmic drugs increase adverse events, increase proarrhythmic events and some antiarrhythmics may increase mortality. Conversely, although they reduce recurrences of atrial fibrillation, there is no evidence of any benefit on other clinical outcomes, compared with placebo or no treatment.
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Affiliation(s)
- Lucie Valembois
- Groupe Hospitalier Pitié‐Salpêtrière‐Charles Foix, AP‐HP, Université Pierre et Marie CurieService de Gériatrie à Orientation Cardiologique et Neurologique7 avenue de la RépubliqueIvry‐sur‐SeineFrance94200
| | - Etienne Audureau
- Hôpital Henri‐Mondor, APHP, Université Paris 12 UPECService de Santé Publique51 Avenue du Maréchal de Lattre de TassignyCréteilFrance94010
| | - Andrea Takeda
- University College LondonInstitute of Health Informatics ResearchLondonUK
| | | | - Joël Belmin
- Université Pierre et Marie Curie (Paris 6)La Triade ‐ Service Hospitalo‐Universitaire de GérontologieGroup Hospitalier Pitié‐Salpêtrière‐Charles Foix7, Avenue de la République, 94 Ivry‐sur‐SeineParisFrance
| | - Carmelo Lafuente‐Lafuente
- Groupe Hospitalier Pitié‐Salpêtrière‐Charles Foix, AP‐HP, Université Pierre et Marie CurieService de Gériatrie à Orientation Cardiologique et Neurologique7 avenue de la RépubliqueIvry‐sur‐SeineFrance94200
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Um KJ, McIntyre WF, Healey JS, Mendoza PA, Koziarz A, Amit G, Chu VA, Whitlock RP, Belley-Côté EP. Pre- and post-treatment with amiodarone for elective electrical cardioversion of atrial fibrillation: a systematic review and meta-analysis. Europace 2019; 21:856-863. [PMID: 30875422 DOI: 10.1093/europace/euy310] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 12/03/2018] [Indexed: 09/07/2023] Open
Abstract
AIMS Clinicians frequently pre-treat patients with amiodarone to increase the efficacy of electrical cardioversion for atrial fibrillation (AF). Our objective was to determine the precise effects of amiodarone pre- and post-treatment on conversion efficacy and sinus rhythm maintenance. METHODS AND RESULTS We conducted a systematic review and meta-analysis of trials comparing pre- and post-treatment for electrical cardioversion with amiodarone vs. no therapy on (i) acute restoration and (ii) maintenance of sinus rhythm after 1 year. We searched MEDLINE and EMBASE from inception to July 2018 for randomized controlled trials. We evaluated the risk of bias for individual studies with the Cochrane tool and overall quality of evidence with the GRADE framework. We identified eight eligible studies (n = 1012). Five studies were deemed to have unclear or high risk of selection bias. We found the evidence to be of high quality based on GRADE. Treatment with amiodarone (200-800 mg daily for 1-6 weeks pre-cardioversion; 0-200 mg daily post-cardioversion) was associated with higher rates of acute restoration [relative risk (RR) 1.22, 95% confidence interval (CI) 1.07-1.39, P = 0.004, n = 1012, I2 = 65%] and maintenance of sinus rhythm over 13 months (RR 4.39, 95% CI 2.99-6.45, P < 0.001, n = 695, I2 = 0%). The effects of amiodarone for acute restoration were maintained when considering only studies at low risk of bias (RR 1.22, 95% CI 1.10-1.36, P < 0.001, n = 572, I2 = 0%). Adverse effects were typically non-serious, occurring in 3.4% (6/174) of subjects receiving amiodarone. CONCLUSION High-quality evidence demonstrated that treatment with amiodarone improved the restoration and maintenance of sinus rhythm after electrical cardioversion of AF. Short-term amiodarone was well-tolerated.
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Affiliation(s)
- Kevin J Um
- McMaster University, Hamilton, ON, Canada
| | - William F McIntyre
- McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
| | - Jeff S Healey
- McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
| | | | | | - Guy Amit
- McMaster University, Hamilton, ON, Canada
| | | | - Richard P Whitlock
- McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
| | - Emilie P Belley-Côté
- McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
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Szatmári V, Ji Y, Herwijnen BV, Feng M, Wang MZ, Bossu A, van der Heyden MAG. Efficacy of pentamidine analogue 6 in dogs with chronic atrial fibrillation. J Vet Intern Med 2018; 32:1549-1554. [PMID: 30079486 PMCID: PMC6189345 DOI: 10.1111/jvim.15242] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/25/2018] [Accepted: 05/21/2018] [Indexed: 01/13/2023] Open
Abstract
Background The inward rectifier inhibitor pentamidine analogue 6 (PA‐6) is effective in cardioversion of goats with persistent rapid pacing induced atrial fibrillation (AF) and is not proarrhythmic in dogs with experimental chronic 3rd‐degree AV block. Efficacy and safety in the clinical setting are unknown. Hypothesis That PA‐6 would be effective in converting AF to sinus rhythm (SR) in dogs with naturally occurring AF, without the presence of overt adverse effects. Animals Ten client‐owned large and giant breed dogs. Methods Animals with persistent or permanent AF were recruited for our prospective study. PA‐6 was administered IV as a bolus of 2.5 mg/kg 10 min−1 followed by a maintenance infusion of 0.04 mg/kg min−1 for a maximum of 50 minutes in conscious dogs. Standard 6 lead limb ECG was recorded during the infusion. Visible and audible signs of adverse effects were scored during the entire procedure. Results PA‐6 did not induce changes in QRS duration (54.7 ± 4.6 versus 56.7 ± 6.1 ms, P = .42), QTc interval (241.1 ± 19.5 versus 258.7 ± 19.8 ms, P = .061) or RR interval (363.4 ± 84.6 versus 440.8 ± 96.3 ms, P = .072) at the end of the bolus. No cardioversion to SR was observed in any dog. Three dogs displayed no adverse effects. Five dogs had premature ventricular depolarizations during PA‐6 infusion on the ECG. Respiratory distress with laryngeal stridor, subtle muscle twitching, and mild generalized muscular weakness were noncardiac adverse effects observed in 5 dogs. Adverse effects resolved spontaneously. Conclusions and Clinical importance Chronic naturally occurring AF in large and giant breed dogs could not be cardioverted to SR by PA‐6.
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Affiliation(s)
- Viktor Szatmári
- Department of Clinical Sciences of Companion Animals, Utrecht University, Utrecht, The Netherlands
| | - Yuan Ji
- Department of Medical Physiology, University Medical Center Utrecht, Utrecht, The Netherlands.,Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Bianca van Herwijnen
- Department of Medical Physiology, University Medical Center Utrecht, Utrecht, The Netherlands.,Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Mei Feng
- Department of Pharmaceutical Chemistry, School of Pharmacy, The University of Kansas, Lawrence, Kansas
| | - Michael Zhou Wang
- Department of Pharmaceutical Chemistry, School of Pharmacy, The University of Kansas, Lawrence, Kansas
| | - Alexandre Bossu
- Department of Medical Physiology, University Medical Center Utrecht, Utrecht, The Netherlands.,Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marcel A G van der Heyden
- Department of Medical Physiology, University Medical Center Utrecht, Utrecht, The Netherlands.,Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, The Netherlands
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Rogers PA, Bernard ML, Madias C, Thihalolipavan S, Mark Estes N, Morin DP. Current Evidence-Based Understanding of the Epidemiology, Prevention, and Treatment of Atrial Fibrillation. Curr Probl Cardiol 2018; 43:241-283. [DOI: 10.1016/j.cpcardiol.2017.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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11
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Dan GA, Martinez-Rubio A, Agewall S, Boriani G, Borggrefe M, Gaita F, van Gelder I, Gorenek B, Kaski JC, Kjeldsen K, Lip GYH, Merkely B, Okumura K, Piccini JP, Potpara T, Poulsen BK, Saba M, Savelieva I, Tamargo JL, Wolpert C, Sticherling C, Ehrlich JR, Schilling R, Pavlovic N, De Potter T, Lubinski A, Svendsen JH, Ching K, Sapp JL, Chen-Scarabelli C, Martinez F. Antiarrhythmic drugs–clinical use and clinical decision making: a consensus document from the European Heart Rhythm Association (EHRA) and European Society of Cardiology (ESC) Working Group on Cardiovascular Pharmacology, endorsed by the Heart Rhythm Society (HRS), Asia-Pacific Heart Rhythm Society (APHRS) and International Society of Cardiovascular Pharmacotherapy (ISCP). Europace 2018; 20:731-732an. [DOI: 10.1093/europace/eux373] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 12/11/2017] [Indexed: 12/22/2022] Open
Affiliation(s)
- Gheorghe-Andrei Dan
- Colentina University Hospital, University of Medicine and Pharmacy “Carol Davila”, Bucharest, Romania
| | - Antoni Martinez-Rubio
- University Hospital of Sabadell (University Autonoma of Barcelona), Plaça Cívica, Campus de la UAB, Barcelona, Spain
| | - Stefan Agewall
- Oslo University Hospital Ullevål, Norway
- Institute of Clinical Sciences, University of Oslo, Søsterhjemmet, Oslo, Norway
| | - Giuseppe Boriani
- Policlinico di Modena, University of Modena and Reggio Emilia, Modena, Italy
| | - Martin Borggrefe
- Universitaetsmedizin Mannheim, Medizinische Klinik, Mannheim, Germany
| | - Fiorenzo Gaita
- Department of Medical Sciences, University of Turin, Citta' della Salute e della Scienza Hospital, Turin, Italy
| | - Isabelle van Gelder
- Department of Cardiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Bulent Gorenek
- Department of Cardiology, Eskisehir Osmangazi University, Büyükdere Mahallesi, Odunpazarı/Eskişehir, Turkey
| | - Juan Carlos Kaski
- Molecular and Clinical Sciences Research Institute, St. George’s, University of London, London, UK
| | - Keld Kjeldsen
- Copenhagen University Hospital (Holbæk Hospital), Holbæk, Institute for Clinical Medicine, Copenhagen University, Copenhagen, Denmark
- Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Gregory Y H Lip
- Institute of Cardiovascular Sciences, University of Birmingham, Centre For Cardiovascular Sciences, City Hospital, Birmingham, UK
- Aalborg Thrombosis Research Unit, Aalborg University, Aalborg, Denmark
| | - Bela Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Ken Okumura
- Saiseikai Akumamoto Hospital, Kumamoto, Japan
| | | | - Tatjana Potpara
- School of Medicine, Belgrade University; Cardiology Clinic, Clinical Centre of Serbia, Belgrade, Serbia
| | | | - Magdi Saba
- Molecular and Clinical Sciences Research Institute, St. George’s, University of London, London, UK
| | - Irina Savelieva
- Molecular and Clinical Sciences Research Institute, St. George’s, University of London, London, UK
| | - Juan L Tamargo
- Department of Pharmacology, School of Medicine, Universidad Complutense Madrid, Madrid, Spain
| | - Christian Wolpert
- Department of Medicine - Cardiology, Klinikum Ludwigsburg, Ludwigsburg, Germany
| | | | - Joachim R Ehrlich
- Medizinische Klinik I-Kardiologie, Angiologie, Pneumologie, Wiesbaden, Germany
| | - Richard Schilling
- Barts Heart Centre, Trustee Arrhythmia Alliance and Atrial Fibrillation Association, London, UK
| | - Nikola Pavlovic
- Department of Cardiology, University Hospital Centre Sestre milosrdnice, Croatia
| | | | - Andrzej Lubinski
- Uniwersytet Medyczny w Łodzi, Kierownik Kliniki Kardiologii Interwencyjnej, i Zaburzeń Rytmu Serca, Kierownik Katedry Chorób Wewnętrznych i Kardiologii, Uniwersytecki Szpital Kliniczny im WAM-Centralny Szpital Weteranów, Poland
| | | | - Keong Ching
- Department of Cardiology, National Heart Centre Singapore, Singapore
| | | | | | - Felipe Martinez
- Instituto DAMIC/Fundacion Rusculleda, Universidad Nacional de Córdoba, Córdoba, Argentina
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Isaacs M, Costin M, Bova R, Barrett HL, Heffernan D, Samaras K, Greenfield JR. Management of Amiodarone-Induced Thyrotoxicosis at a Cardiac Transplantation Centre. Front Endocrinol (Lausanne) 2018; 9:482. [PMID: 30186240 PMCID: PMC6113588 DOI: 10.3389/fendo.2018.00482] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 08/03/2018] [Indexed: 12/22/2022] Open
Abstract
Background: Amiodarone-induced thyrotoxicosis (AIT) is associated with significant morbidity and mortality, particularly in patients with cardiac failure. The aim of the study was to evaluate the management of AIT at a tertiary hospital specialising in cardiac failure and transplantation. Methods: Retrospective audit of 66 patients treated for AIT by Endocrinology (2007-2016), classified as type 1 (T1) or type 2 (T2) based on radiological criteria. Main outcome measurements were response rate to initial treatment, time to euthyroidism, and frequency/safety of thyroidectomy. Results: Mean age was 60 ± 2 years; 80% were male. Sixty-four patients commenced medical treatment: thionamides (THIO) in 23, glucocorticoids (GC) in 17 and combination (COMB) in 24. Median thyroxine (fT4) was 35.1 (31.2-46.7) in THIO, 43.1 (30.4 -60.7) in GC, and 60.0 (39.0 ->99.9) pmol/L in COMB (p = 0.01). Initial therapy induced euthyroidism in 52%: 70% THIO, 53% GC, and 33% COMB (p = 0.045) by 100 (49-167), 47 (35-61), and 53 (45-99) days, respectively (p = 0.02). A further 11% became euthyroid after transitioning from monotherapy to COMB. Thyroidectomy was undertaken in 33%. Patients who underwent thyroidectomy were younger (54 ± 3 vs. 63 ± 2 years; p = 0.03), with higher prevalence of severely impaired left ventricular function prior to diagnosis of AIT (38 vs. 18%; p = 0.08). Despite median American Society of Anaesthesiologists classification 4, no thyroidectomy patient experienced cardiorespiratory complications/death. Conclusions: Patients with AIT had limited response to medical treatment. The poorest response was observed in COMB group, likely related to greater hyperthyroidism severity. Thyroidectomy is safe in patients with severe cardiac failure if performed in a centre with cardiac anaesthetic expertise. There should be low threshold for proceeding to thyroidectomy in patients with severe AIT and/or cardiac failure.
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Affiliation(s)
- Michelle Isaacs
- Department of Endocrinology, St Vincent's Hospital Sydney, Darlinghurst, NSW, Australia
- *Correspondence: Michelle Isaacs
| | - Monique Costin
- Northern Sydney Endocrine Centre, Sydney, NSW, Australia
- Faculty of Medicine, University of Notre Dame, Sydney, NSW, Australia
- Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Ron Bova
- Faculty of Medicine, University of Notre Dame, Sydney, NSW, Australia
- Department of Ear Nose and Throat Surgery, St Vincent's Hospital Sydney, Darlinghurst, NSW, Australia
| | - Helen L. Barrett
- Department of Obstetric Medicine, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
- Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Drew Heffernan
- Department of Anaesthetics, St Vincent's Hospital Sydney, Darlinghurst, NSW, Australia
| | - Katherine Samaras
- Department of Endocrinology, St Vincent's Hospital Sydney, Darlinghurst, NSW, Australia
- Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Jerry R. Greenfield
- Department of Endocrinology, St Vincent's Hospital Sydney, Darlinghurst, NSW, Australia
- Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW, Australia
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2016 ACC/AHA Clinical Performance and Quality Measures for Adults With Atrial Fibrillation or Atrial Flutter. J Am Coll Cardiol 2016; 68:525-568. [DOI: 10.1016/j.jacc.2016.03.521] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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2016 ACC/AHA Clinical Performance and Quality Measures for Adults With Atrial Fibrillation or Atrial Flutter. Circ Cardiovasc Qual Outcomes 2016; 9:443-88. [DOI: 10.1161/hcq.0000000000000018] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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15
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Lafuente-Lafuente C, Valembois L, Bergmann JF, Belmin J. Antiarrhythmics for maintaining sinus rhythm after cardioversion of atrial fibrillation. Cochrane Database Syst Rev 2015:CD005049. [PMID: 25820938 DOI: 10.1002/14651858.cd005049.pub4] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Atrial fibrillation is the most frequent sustained arrhythmia. Atrial fibrillation frequently recurs after restoration of normal sinus rhythm. Antiarrhythmic drugs have been widely used to prevent recurrence, but the effect of these drugs on mortality and other clinical outcomes is unclear. This is an update of a review previously published in 2008 and 2012. OBJECTIVES To determine in patients who have recovered sinus rhythm after having atrial fibrillation, the effects of long-term treatment with antiarrhythmic drugs on death, stroke, embolism, drug adverse effects and recurrence of atrial fibrillation. SEARCH METHODS We updated the searches of CENTRAL in The Cochrane Library (2013, Issue 12 of 12), MEDLINE (to January 2014) and EMBASE (to January 2014). The reference lists of retrieved articles, recent reviews and meta-analyses were checked. SELECTION CRITERIA Two independent authors selected randomised controlled trials comparing any antiarrhythmic drug with a control (no treatment, placebo, drugs for rate control) or with another antiarrhythmic drug in adults who had atrial fibrillation and in whom sinus rhythm was restored. Post-operative atrial fibrillation was excluded. DATA COLLECTION AND ANALYSIS Two authors independently assessed quality and extracted data. Studies were pooled, if appropriate, using Peto odds ratio (OR). All results were calculated at one year of follow-up. MAIN RESULTS In this update three new studies, with 534 patients, were included making a total of 59 included studies comprising 21,305 patients. All included studies were randomised controlled trials. Allocation concealment was adequate in 17 trials, it was unclear in the remaining 42 trials. Risk of bias was assessed in all domains only in the trials included in this update.Compared with controls, class IA drugs quinidine and disopyramide (OR 2.39, 95% confidence interval (95% CI) 1.03 to 5.59, number needed to treat to harm (NNTH) 109, 95% CI 34 to 4985) and sotalol (OR 2.23, 95% CI 1.1 to 4.50, NNTH 169, 95% CI 60 to 2068) were associated with increased all-cause mortality. Other antiarrhythmics did not seem to modify mortality, but our data could be underpowered to detect mild increases in mortality for several of the drugs studied.Several class IA (disopyramide, quinidine), IC (flecainide, propafenone) and III (amiodarone, dofetilide, dronedarone, sotalol) drugs significantly reduced recurrence of atrial fibrillation (OR 0.19 to 0.70, number needed to treat to beneft (NNTB) 3 to 16). Beta-blockers (metoprolol) also significantly reduced atrial fibrillation recurrences (OR 0.62, 95% CI 0.44 to 0.88, NNTB 9).All analysed drugs increased withdrawals due to adverse affects and all but amiodarone, dronedarone and propafenone increased pro-arrhythmia. Only 11 trials reported data on stroke. None of them found any significant difference with the exception of a single trial than found less strokes in the group treated with dronedarone compared to placebo. This finding was not confirmed in others studies on dronedarone.We could not analyse heart failure and use of anticoagulation because few original studies reported on these measures. AUTHORS' CONCLUSIONS Several class IA, IC and III drugs, as well as class II drugs (beta-blockers), are moderately effective in maintaining sinus rhythm after conversion of atrial fibrillation. However, they increase adverse events, including pro-arrhythmia, and some of them (disopyramide, quinidine and sotalol) may increase mortality. Possible benefits on clinically relevant outcomes (stroke, embolism, heart failure) remain to be established.
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Affiliation(s)
- Carmelo Lafuente-Lafuente
- Service de Gériatrie à Orientation Cardiologique et Neurologique, Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, AP-HP, Université Pierre et Marie Curie, 7 Avenue de la République, Ivry-sur-Seine, Ile-de-France, France, 94205
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January CT, Wann LS, Alpert JS, Calkins H, Cigarroa JE, Cleveland JC, Conti JB, Ellinor PT, Ezekowitz MD, Field ME, Murray KT, Sacco RL, Stevenson WG, Tchou PJ, Tracy CM, Yancy CW. 2014 AHA/ACC/HRS guideline for the management of patients with atrial fibrillation: a report of the American College of Cardiology/American Heart Association Task Force on practice guidelines and the Heart Rhythm Society. Circulation 2014; 130:e199-267. [PMID: 24682347 PMCID: PMC4676081 DOI: 10.1161/cir.0000000000000041] [Citation(s) in RCA: 900] [Impact Index Per Article: 90.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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January CT, Wann LS, Alpert JS, Calkins H, Cigarroa JE, Cleveland JC, Conti JB, Ellinor PT, Ezekowitz MD, Field ME, Murray KT, Sacco RL, Stevenson WG, Tchou PJ, Tracy CM, Yancy CW. 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation: Executive Summary. J Am Coll Cardiol 2014. [DOI: 10.1016/j.jacc.2014.03.021] [Citation(s) in RCA: 508] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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CADRIN-TOURIGNY JULIA, WYSE D, ROY DENIS, BLONDEAU LUCIE, LEVESQUE SYLVIE, TALAJIC MARIO, ANDRADE JASONG, DUBUC MARC, THIBAULT BERNARD, GUERRA PETERG, MACLE LAURENT, RIVARD LENA, KHAIRY PAUL. Efficacy of Amiodarone in Patients with Atrial Fibrillation with and without Left Ventricular Dysfunction: A Pooled Analysis of AFFIRM and AF-CHF Trials. J Cardiovasc Electrophysiol 2014; 25:1306-13. [DOI: 10.1111/jce.12535] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 07/15/2014] [Accepted: 07/21/2014] [Indexed: 12/22/2022]
Affiliation(s)
- JULIA CADRIN-TOURIGNY
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - D.G. WYSE
- Libin Cardiovascular Institute; Calgary Alberta Canada
| | - DENIS ROY
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - LUCIE BLONDEAU
- Montreal Heart Institute Coordinating Center; Montreal Quebec Canada
| | - SYLVIE LEVESQUE
- Montreal Heart Institute Coordinating Center; Montreal Quebec Canada
| | - MARIO TALAJIC
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - JASON G. ANDRADE
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - MARC DUBUC
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - BERNARD THIBAULT
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - PETER G. GUERRA
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - LAURENT MACLE
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - LENA RIVARD
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
| | - PAUL KHAIRY
- Electrophysiology Service; Montreal Heart Institute; Université de Montréal; Montreal Quebec Canada
- Montreal Heart Institute Coordinating Center; Montreal Quebec Canada
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Gonna H, Gallagher MM. The efficacy and tolerability of commonly used agents to prevent recurrence of atrial fibrillation after successful cardioversion. Am J Cardiovasc Drugs 2014; 14:241-51. [PMID: 24604773 DOI: 10.1007/s40256-014-0064-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A number of therapeutic strategies exist for the restoration and maintenance of sinus rhythm in patients presenting with atrial fibrillation. The acute success rate with electrical cardioversion is high. However, many patients relapse into atrial fibrillation. A major challenge faced by those who care for patients with atrial fibrillation is the long-term maintenance of sinus rhythm whilst avoiding treatment-related adverse effects. This review examines the efficacy and tolerability of conventional anti-arrhythmic drugs for the secondary prevention of atrial fibrillation in the post-cardioversion period.
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Affiliation(s)
- Hanney Gonna
- Department of Cardiology, St. George's Hospital, Blackshaw Rd, SW17 0QT, London, UK
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2014 AHA/ACC/HRS guideline for the management of patients with atrial fibrillation: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the Heart Rhythm Society. J Am Coll Cardiol 2014; 64:e1-76. [PMID: 24685669 DOI: 10.1016/j.jacc.2014.03.022] [Citation(s) in RCA: 2832] [Impact Index Per Article: 283.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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January CT, Wann LS, Alpert JS, Calkins H, Cigarroa JE, Cleveland JC, Conti JB, Ellinor PT, Ezekowitz MD, Field ME, Murray KT, Sacco RL, Stevenson WG, Tchou PJ, Tracy CM, Yancy CW. 2014 AHA/ACC/HRS guideline for the management of patients with atrial fibrillation: executive summary: a report of the American College of Cardiology/American Heart Association Task Force on practice guidelines and the Heart Rhythm Society. Circulation 2014; 130:2071-104. [PMID: 24682348 DOI: 10.1161/cir.0000000000000040] [Citation(s) in RCA: 1523] [Impact Index Per Article: 152.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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KATO TAKESHI, IWASAKI YUKI, DUKER GORAN, FJELLSTROM OLA, GIORDANETTO FABRIZIO, SUNDQVIST MONIKA, WALLIN ANITA, WANG QINGDONG, NATTEL STANLEY. Inefficacy of a Highly Selective T-Type Calcium Channel Blocker in Preventing Atrial Fibrillation Related Remodeling. J Cardiovasc Electrophysiol 2014; 25:531-536. [DOI: 10.1111/jce.12346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 11/21/2013] [Accepted: 12/03/2013] [Indexed: 11/30/2022]
Affiliation(s)
- TAKESHI KATO
- Department of Medicine and Research Center; Montreal Heart Institute; University of Montreal; Montreal Quebec Canada
| | - YU-KI IWASAKI
- Department of Medicine and Research Center; Montreal Heart Institute; University of Montreal; Montreal Quebec Canada
| | - GORAN DUKER
- Departments of Bioscience; AstraZeneca R&D Mölndal; Mölndal Sweden
| | - OLA FJELLSTROM
- Medicinal Chemistry; AstraZeneca R&D Mölndal; Mölndal Sweden
| | | | - MONIKA SUNDQVIST
- DMPK, Cardiovascular & Metabolic Diseases iMed; AstraZeneca R&D Mölndal; Mölndal Sweden
| | - ANITA WALLIN
- DMPK, Cardiovascular & Metabolic Diseases iMed; AstraZeneca R&D Mölndal; Mölndal Sweden
| | - QING-DONG WANG
- Departments of Bioscience; AstraZeneca R&D Mölndal; Mölndal Sweden
| | - STANLEY NATTEL
- Department of Medicine and Research Center; Montreal Heart Institute; University of Montreal; Montreal Quebec Canada
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Kumar N, Pison L, Meir La M, Maessen J. Atraumatic Lung Hernia: A Rare Complication of Minimally Invasive Surgical Atrial Fibrillation Ablation. J Atr Fibrillation 2013; 6:1005. [PMID: 28496921 DOI: 10.4022/jafib.1005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Revised: 12/30/2013] [Accepted: 12/30/2013] [Indexed: 11/10/2022]
Abstract
Lung herniation after minimally invasive thoracoscopic pulmonary vein ablation has never been described before so far. We report for the first time, of its incidence in a 62-year-old patient, 6 weeks after a minimally invasive cardiac surgery (MICS) for atrial fibrillation ablation. We suggest that even after MICS, a high resolution computerized tomography scan should be performed in patients presenting with breathing difficulty and chest pain to rule out this condition too, other than pulmonary vein stenosis.
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Affiliation(s)
| | | | - Mark Meir La
- Department of cardiac surgery,Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht(CARIM), the Netherlands
| | - Jos Maessen
- Department of cardiac surgery,Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht(CARIM), the Netherlands
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Curnis A, Bisleri G, Bontempi L, Salghetti F, Cerini M, Lipari A, Pagnoni C, Vassanelli F, Muneretto C. Hybrid Therapy for Atrial Fibrillation: where the Knife meets the Catheter. J Atr Fibrillation 2013; 6:775. [PMID: 28496850 DOI: 10.4022/jafib.775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 03/18/2013] [Accepted: 03/28/2013] [Indexed: 11/10/2022]
Abstract
During the past decades there has been a consistent evolution of both surgical and catheter-based techniques for the treatment of stand-alone atrial fibrillation, as alternatives or in combination with anti-arrhythmic drugs. Transcatheter ablation has significantly improved outcomes, despite often requiring multiple procedures and with limited success rates especially in presence of persistent atrial fibrillation. Surgical procedures have dramatically evolved from the original cut-and-sew Maze operation, allowing nowadays for closed-chest epicardial ablations on the beating heart. Recently, the concept of a close collaboration between the cardiac surgeon and the electrophysiologist has emerged as an intriguing option in order to overcome the drawbacks and suboptimal results of both techniques; therefore, the hybrid approach has been proposed as a potentially more successful strategy, allowing for a patient-tailored therapeutical approach. We reviewed the recent advancements either from the transcatheter and surgical standpoint, with a peculiar focus on the current option to merge both techniques along with an up-to-date review of the preliminary clinical experiences with the hybrid, surgical-transcatheter treatment of stand-alone atrial fibrillation.
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Affiliation(s)
- Antonio Curnis
- Section of Electrophysiology, Division of Cardiology, Spedali Civili, University of Brescia Medical School, Brescia, Italy
| | - Gianluigi Bisleri
- Division of Cardiac Surgery, Spedali Civili, University of Brescia Medical School, Brescia, Italy
| | - Luca Bontempi
- Section of Electrophysiology, Division of Cardiology, Spedali Civili, University of Brescia Medical School, Brescia, Italy
| | - Francesca Salghetti
- Section of Electrophysiology, Division of Cardiology, Spedali Civili, University of Brescia Medical School, Brescia, Italy
| | - Manuel Cerini
- Section of Electrophysiology, Division of Cardiology, Spedali Civili, University of Brescia Medical School, Brescia, Italy
| | - Alessandro Lipari
- Section of Electrophysiology, Division of Cardiology, Spedali Civili, University of Brescia Medical School, Brescia, Italy
| | - Carlo Pagnoni
- Section of Electrophysiology, Division of Cardiology, Spedali Civili, University of Brescia Medical School, Brescia, Italy
| | - Francesca Vassanelli
- Section of Electrophysiology, Division of Cardiology, Spedali Civili, University of Brescia Medical School, Brescia, Italy
| | - Claudio Muneretto
- Division of Cardiac Surgery, Spedali Civili, University of Brescia Medical School, Brescia, Italy
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Muneretto C, Bisleri G, Bontempi L, Cheema FH, Curnis A. Successful Treatment of Lone Persistent Atrial Fibrillation by Means of a Hybrid Thoracoscopic-Transcatheter Approach. INNOVATIONS-TECHNOLOGY AND TECHNIQUES IN CARDIOTHORACIC AND VASCULAR SURGERY 2012. [DOI: 10.1177/155698451200700404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
| | | | - Luca Bontempi
- †Cardiology, University of Brescia Medical School, Brescia, Italy
| | - Faisal H. Cheema
- Division of Cardiothoracic Surgery, Columbia College of Physicians & Surgeons, New York, NY USA
| | - Antonio Curnis
- †Cardiology, University of Brescia Medical School, Brescia, Italy
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Successful Treatment of Lone Persistent Atrial Fibrillation by Means of a Hybrid Thoracoscopic-Transcatheter Approach. INNOVATIONS-TECHNOLOGY AND TECHNIQUES IN CARDIOTHORACIC AND VASCULAR SURGERY 2012; 7:254-8. [PMID: 23123991 DOI: 10.1097/imi.0b013e31826f0462] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Objective Ablation strategies for the treatment of lone persistent atrial fibrillation (AF) have rapidly evolved during the past decade both with electrophysiological (EP) and surgical approaches. We investigated the safety and efficacy of a novel staged hybrid approach combining surgical thoracoscopic and EP ablation in patients with lone persistent AF. Methods Twenty-four consecutive patients with either persistent (three patients, 12.5%) or long-standing persistent (21 patients, 87.5%) isolated AF were prospectively enrolled: the mean age was 63.2 ± 9.3 years, the mean left atrial dimension was 50.5 ± 8 mm, and the mean AF duration was 82.7 months (range, 7–240 months). The surgical procedure consisted of a monolateral, right-sided, thoracoscopic closed-chest approach to perform a “box” lesion set with a temperature-controlled, internally cooled, radiofrequency monopolar device with suction adherence (Cobra Adhere XL; Estech, San Ramon, CA USA). A continuous monitoring rhythm device (Reveal XT; Medtronic, Minneapolis, MN USA) was implanted at the time of surgery in all patients for continuous long-term monitoring of the heart rhythm. Results Successful completion of the procedure was achieved in all cases, with a mean ablation time of 29 ± 9 minutes and an overall procedural time of 84 ± 16 minutes. After surgical ablation, the exit block was documented in all cases, whereas the entrance block was achieved in 87.5% (21 of 24 patients). No intensive care unit stay was required, and no complications occurred postoperatively; hospital mortality was 0%. At a mean interval of 33 ± 2 days after surgery, an EP study was performed: bidirectional block was confirmed in 79.1% (19 of 24 patients), whereas gaps at the level of the box lesion were observed in 20.8% of the patients (5 of 24 patients). Additional transcatheter endocardial right- and left-sided lesions were performed in 62.5% of cases (15 of 24 patients). At a mean follow-up of 28 months (range, 1–55 months), 87.5% of the patients (21 of 24 patients) are in sinus rhythm, and the incidence of left atrial flutter was 0%. Conclusions The combination of thoracoscopic box lesion and transcatheter ablation in a staged hybrid approach proved to be safe, providing excellent mid-term clinical outcomes in patients with long-standing, isolated, persistent AF. Moreover, the implantable loop recorders documented such incremental benefits in sinus rhythm restoration for up to 28 months.
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Lafuente-Lafuente C, Longas-Tejero MA, Bergmann JF, Belmin J. Antiarrhythmics for maintaining sinus rhythm after cardioversion of atrial fibrillation. Cochrane Database Syst Rev 2012:CD005049. [PMID: 22592700 DOI: 10.1002/14651858.cd005049.pub3] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Atrial fibrillation (AF) is the most frequent sustained arrhythmia. AF recurs frequently after restoration of normal sinus rhythm. Antiarrhythmic drugs have been widely used to prevent recurrence, but the effect of these drugs on mortality and other clinical outcomes is unclear. OBJECTIVES To determine, in patients who recovered sinus rhythm after AF, the effect of long-term treatment with antiarrhythmic drugs on death, stroke and embolism, adverse effects, pro-arrhythmia, and recurrence of AF. SEARCH METHODS We updated the searches of CENTRAL on The Cochrane Libary (Issue 1 of 4, 2010), MEDLINE (1950 to February 2010) and EMBASE (1966 to February 2010). The reference lists of retrieved articles, recent reviews and meta-analyses were checked. SELECTION CRITERIA Two independent reviewers selected randomised controlled trials comparing any antiarrhythmic with a control (no treatment, placebo or drugs for rate control) or with another antiarrhythmic, in adults who had AF and in whom sinus rhythm was restored. Post-operative AF was excluded. DATA COLLECTION AND ANALYSIS Two reviewers independently assessed quality and extracted data. Studies were pooled, if appropriate, using Peto odds ratio (OR). All results were calculated at one year of follow-up. MAIN RESULTS In this update, 11 new studies met inclusion criteria, making a total of 56 included studies, comprising 20,771 patients. Compared with controls, class IA drugs quinidine and disopyramide (OR 2.39, 95% confidence interval (95%CI) 1.03 to 5.59, number needed to harm (NNH) 109, 95%CI 34 to 4985) and sotalol (OR 2.47, 95%CI 1.2 to 5.05, NNH 166, 95%CI 61 to 1159) were associated with increased all-cause mortality. Other antiarrhythmics did not seem to modify mortality.Several class IA (disopyramide, quinidine), IC (flecainide, propafenone) and III (amiodarone, dofetilide, dronedarone, sotalol) drugs significantly reduced recurrence of AF (OR 0.19 to 0.70, number needed to treat (NNT) 3 to 16). Beta-blockers (metoprolol) also reduced significantly AF recurrence (OR 0.62, 95% CI 0.44 to 0.88, NNT 9).All analysed drugs increased withdrawals due to adverse affects and all but amiodarone, dronedarone and propafenone increased pro-arrhythmia. We could not analyse other outcomes because few original studies reported them. AUTHORS' CONCLUSIONS Several class IA, IC and III drugs, as well as class II (beta-blockers), are moderately effective in maintaining sinus rhythm after conversion of atrial fibrillation. However, they increase adverse events, including pro-arrhythmia, and some of them (disopyramide, quinidine and sotalol) may increase mortality. Possible benefits on clinically relevant outcomes (stroke, embolisms, heart failure) remain to be established.
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Affiliation(s)
- Carmelo Lafuente-Lafuente
- Service deGériatrie à orientation Cardiologique etNeurologique, Groupe hospitalier Pitié-Salpêtrière-Charles Foix, AP-HP,UniversitéPierre et Marie Curie (Paris 6), Ivry-sur-Seine, France.
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Santangeli P, Di Biase L, Burkhardt JD, Bai R, Mohanty P, Pump A, Natale A. Examining the safety of amiodarone. Expert Opin Drug Saf 2012; 11:191-214. [PMID: 22324910 DOI: 10.1517/14740338.2012.660915] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Amiodarone is the most widely used antiarrhythmic agent, with demonstrated effectiveness against all the spectrum of cardiac tachyarrhythmias. The risk of adverse effects acts as a limiting factor to its utilization especially in the long term. This article systematically reviews the published evidence on amiodarone versus placebo to examine its safety as an antiarrhythmic drug. AREAS COVERED Authors collected data on adverse effects reported in 49 randomized placebo-controlled trials with amiodarone. Adverse effects were classified according to the organ/system involved. Pooled estimates of the number needed to treat (NNT) and to harm (NNH) versus placebo were calculated. EXPERT OPINION Amiodarone is effective for both the acute conversion of atrial fibrillation (AF) (11 trials, NNT = 4 at 24 h; p = 0.003) and the prevention of postoperative AF (18 trials, NNT = 8; p < 0.001), although with an increased risk of bradycardia, hypotension, nausea or phlebitis (pooled NNH = 4; p < 0.001). Amiodarone administration for the maintenance of sinus rhythm has a favorable net clinical benefit (pooled NNT = 3; p < 0.001 versus pooled NNH for either thyroid toxicity, gastrointestinal discomfort, skin toxicity or eye toxicity = 11; p < 0.001). Treatment with amiodarone for the prophylaxis of sudden cardiac death has less favorable net clinical benefit (15 trials, NNT = 38; p < 0.001 versus NNH for either thyroid toxicity, hepatic toxicity, pulmonary toxicity or bradycardia = 14; p < 0.001). Amiodarone treatment in this setting should be used in only selected cases.
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Role of oral amiodarone in patients with atrial fibrillation and congestive heart failure. J Cardiol 2011; 58:108-15. [DOI: 10.1016/j.jjcc.2011.06.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 06/16/2011] [Accepted: 06/21/2011] [Indexed: 11/17/2022]
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Fuster V, Rydén LE, Cannom DS, Crijns HJ, Curtis AB, Ellenbogen KA, Halperin JL, Kay GN, Le Huezey JY, Lowe JE, Olsson SB, Prystowsky EN, Tamargo JL, Wann LS. 2011 ACCF/AHA/HRS Focused Updates Incorporated Into the ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation. Circulation 2011; 123:e269-367. [PMID: 21382897 DOI: 10.1161/cir.0b013e318214876d] [Citation(s) in RCA: 592] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fuster V, Rydén LE, Cannom DS, Crijns HJ, Curtis AB, Ellenbogen KA, Halperin JL, Kay GN, Le Huezey JY, Lowe JE, Olsson SB, Prystowsky EN, Tamargo JL, Wann LS. 2011 ACCF/AHA/HRS Focused Updates Incorporated Into the ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation. J Am Coll Cardiol 2011; 57:e101-98. [PMID: 21392637 DOI: 10.1016/j.jacc.2010.09.013] [Citation(s) in RCA: 543] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Santangeli P, Di Biase L, Pelargonio G, Burkhardt JD, Natale A. The pharmaceutical pipeline for atrial fibrillation. Ann Med 2011; 43:13-32. [PMID: 21166558 DOI: 10.3109/07853890.2010.538431] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Atrial fibrillation (AF) is associated with a significant burden of morbidity and increased risk of mortality. Beyond outstanding advances in catheter ablation procedures, antiarrhythmic drug therapy remains a corner-stone to restore and maintain sinus rhythm. However, potentially life-threatening hazards (proarrhythmia) and significant non-cardiac organ toxicity have made new drug development of prominent relevance. Multichannel blocking, atrial selectivity, and the reduction of the risk of adverse events have all constituted the main theme of modern antifibrillatory drug development. Dronedarone, an analog of amiodarone, has the unique characteristic of being the first antiarrhythmic drug demonstrated to reduce hospitalizations in AF. Dronedarone is associated with less systemic toxicity than amiodarone, although being less effective for sinus rhythm maintenance. Atrial selective agents have been developed to target ion channels expressed selectively in the atria. Among the most promising drugs of this class is vernakalant, which has been shown effective for the acute conversion of AF with small risk of proarrhythmia. Finally, increasing evidences support antiarrhythmic effectiveness of traditional non-antiarrhythmic drugs, such as renin-angiotensin system blockers, statins, and omega-3 fatty acids. In this article, we will focus on recent advances in antiarrhythmic therapy for AF, reviewing the possible clinical utility of novel antifibrillatory agents.
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Affiliation(s)
- Pasquale Santangeli
- Texas Cardiac Arrhythmia Institute, St. David's Medical Center, Austin, TX 78705, USA
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Freemantle N, Lafuente-Lafuente C, Mitchell S, Eckert L, Reynolds M. Mixed treatment comparison of dronedarone, amiodarone, sotalol, flecainide, and propafenone, for the management of atrial fibrillation. Europace 2011; 13:329-45. [DOI: 10.1093/europace/euq450] [Citation(s) in RCA: 159] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Reply. J Am Coll Cardiol 2010. [DOI: 10.1016/j.jacc.2009.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lewalter T. Comparative Efficacy of Dronedarone and Amiodarone for the Maintenance of Sinus Rhythm in Patients With Atrial Fibrillation. J Am Coll Cardiol 2010; 55:1051-2; author reply 1052-3. [DOI: 10.1016/j.jacc.2009.10.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2009] [Accepted: 10/13/2009] [Indexed: 11/26/2022]
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Piccini JP, Hasselblad V, Peterson ED, Washam JB, Califf RM, Kong DF. Comparative Efficacy of Dronedarone and Amiodarone for the Maintenance of Sinus Rhythm in Patients With Atrial Fibrillation. J Am Coll Cardiol 2009; 54:1089-95. [PMID: 19744618 DOI: 10.1016/j.jacc.2009.04.085] [Citation(s) in RCA: 155] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2009] [Revised: 04/22/2009] [Accepted: 04/28/2009] [Indexed: 11/26/2022]
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Doyle JF, Ho KM. Benefits and risks of long-term amiodarone therapy for persistent atrial fibrillation: a meta-analysis. Mayo Clin Proc 2009; 84:234-42. [PMID: 19252110 PMCID: PMC2664595 DOI: 10.1016/s0025-6196(11)61140-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
OBJECTIVE To assess whether amiodarone, as part of a strategy to achieve sinus rhythm, is safe and effective compared with a placebo or rate control drug in patients with persistent atrial fibrillation (AF) of more than 30 days' duration. METHODS Randomized controlled trials comparing amiodarone with a placebo or rate control drug were identified through the EMBASE (January 1, 1988, to October 18, 2008), MEDLINE (January 1, 1966, to October 18, 2008), and Cochrane Controlled Trials Register (second issue 2008) databases with no language restrictions. RESULTS Twelve randomized controlled trials that involved a total of 5060 patients with persistent AF were considered. Amiodarone was more effective than a placebo or rate control drug in achieving sinus rhythm (21.3 vs 9.2 per 100 patient-years in sinus rhythm; relative risk [RR], 3.2; 95% confidence interval [CI], 1.9-5.5), and its use was not associated with an increased risk of long-term mortality (4.7 vs 3.9 per 100 patient-years; RR, 0.95; 95% CI, 0.8-1.1; P=.51; I2=0%). Cessation of amiodarone therapy because of intolerable adverse effects was more common compared with a placebo or rate control drug (10.7 vs 1.9 per 100 patient-years; RR, 3.0; 95% CI, 1.4-6.2; P<.001; I2=70%), but amiodarone was not associated with an increased incidence of hospitalizations (RR, 1.1; 95% CI, 0.6-2.1; P=.77; I2=90%). CONCLUSION Amiodarone, as part of a strategy to achieve and maintain sinus rhythm, appears to be safe and effective in patients with persistent AF. However, some patients may not tolerate the adverse effects of this agent.
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Affiliation(s)
- James F Doyle
- Intensive Care Unit, Royal Perth Hospital and School of Population Health, University of Western Australia, Perth, Western Australia, Australia 6000.
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Doyle JF, Ho KM. Benefits and risks of long-term amiodarone therapy for persistent atrial fibrillation: a meta-analysis. Mayo Clin Proc 2009; 84:234-42. [PMID: 19252110 PMCID: PMC2664595 DOI: 10.4065/84.3.234] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
OBJECTIVE To assess whether amiodarone, as part of a strategy to achieve sinus rhythm, is safe and effective compared with a placebo or rate control drug in patients with persistent atrial fibrillation (AF) of more than 30 days' duration. METHODS Randomized controlled trials comparing amiodarone with a placebo or rate control drug were identified through the EMBASE (January 1, 1988, to October 18, 2008), MEDLINE (January 1, 1966, to October 18, 2008), and Cochrane Controlled Trials Register (second issue 2008) databases with no language restrictions. RESULTS Twelve randomized controlled trials that involved a total of 5060 patients with persistent AF were considered. Amiodarone was more effective than a placebo or rate control drug in achieving sinus rhythm (21.3 vs 9.2 per 100 patient-years in sinus rhythm; relative risk [RR], 3.2; 95% confidence interval [CI], 1.9-5.5), and its use was not associated with an increased risk of long-term mortality (4.7 vs 3.9 per 100 patient-years; RR, 0.95; 95% CI, 0.8-1.1; P=.51; I2=0%). Cessation of amiodarone therapy because of intolerable adverse effects was more common compared with a placebo or rate control drug (10.7 vs 1.9 per 100 patient-years; RR, 3.0; 95% CI, 1.4-6.2; P<.001; I2=70%), but amiodarone was not associated with an increased incidence of hospitalizations (RR, 1.1; 95% CI, 0.6-2.1; P=.77; I2=90%). CONCLUSION Amiodarone, as part of a strategy to achieve and maintain sinus rhythm, appears to be safe and effective in patients with persistent AF. However, some patients may not tolerate the adverse effects of this agent.
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Affiliation(s)
- James F Doyle
- Intensive Care Unit, Royal Perth Hospital and School of Population Health, University of Western Australia, Perth, Western Australia, Australia 6000.
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Hunt LC, de Jongh Curry AL. Transthoracic atrial defibrillation energy thresholds are correlated to uniformity of current density distributions. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2008; 2006:4374-7. [PMID: 17946241 DOI: 10.1109/iembs.2006.259490] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Previous studies have shown that successful defibrillation depends on the uniformity of current density in the heart and the percentage of total current reaching the heart. This study uses an anatomically-realistic finite element computer model of the human torso for external atrial defibrillation to (1) examine the defibrillation energy thresholds and current density distributions for common clinical paddle placements and (2) investigate the effects of electrode shifts on these defibrillation parameters. The model predicts atrial defibrillation threshold (AD FT) energy by requiring a voltage gradient of 5 V/cm over at least 95% of atrial myocardium. This study finds that variation in electrode placement by only a few centimeters increases ADFTs by up to 46% with a corresponding change of 38% between the average current density in the left and right atria and 34% between the heterogeneity indices of atrial current density distributions. Additionally, the heterogeneity index, or degree of uniformity, is linearly correlated to the ADFT (R2=0.9). We suggest that uniformity of current density distribution, in addition to minimum current density, may be an important parameter to use for predicting successful defibrillation when testing new electrode placements.
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Affiliation(s)
- Leslie C Hunt
- Dept. of Biomed. Eng., Memphis Univ., TN 38152, USA.
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Russomanno DJ, de Jongh Curry AL, Atanasova GS, Hunt LC, Caleb Goodwin JC. DefibViz: a visualization tool for the assessment of electrode parameters on transthoracic defibrillation thresholds. ACTA ACUST UNITED AC 2008; 12:76-86. [PMID: 18270039 DOI: 10.1109/titb.2007.899511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
DefibViz is a software application developed for defibrillation simulation and visualization. It exploits both surface techniques and methods for the interactive exploration of volumetric datasets for the analysis of transthoracic defibrillation simulation results. DefibViz\ has a graphical user interface for the specification of the shape, size, position, and applied voltage of a defibrillator's electrodes. An option is provided for using 3-D slice plane widgets, which operate on the volumetric datasets, such that the distribution of the voltage gradient induced by an electric shock can be visually inspected in various tissues throughout the myocardium and torso. One goal of DefibViz is to enhance understanding of how electrode parameters relate to the change of the voltage gradient distribution throughout the heart, which may help lead to optimal defibrillator design. DefibViz; is significant, in that, it is built by using an open-source graphics and visualization framework providing a platform for subsequent modifiability and extensibility. Moreover, it integrates simulation and visualization techniques, which previously required the running of several independent software executables, into an enhanced, seamless, and comprehensive software application.
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Affiliation(s)
- D J Russomanno
- Department of Electrical and Computer Engineering, University of Memphis, Memphis, TN 38152, USA.
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Konakanchi D, de Jongh Curry AL. Simultaneous double external DC shock techniques for atrial fibrillation: a simulation study. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2008; 2008:1745-1748. [PMID: 19163017 DOI: 10.1109/iembs.2008.4649514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The success rate of direct current cardioversion (DCC), the most common method to convert atrial fibrillation (AF) to sinus rhythm (SR), depends on various factors including AF duration, prior anti-arrhythmic therapy, electrode position and size, transthoracic impedance, and the use of biphasic versus monophasic shocks. Recent, small clinical studies have reported using quadruple electrodes to deliver higher energy, in order to increase DCC success rates in refractory patients. This study aims to computationally model and compare double shock defibrillation with conventional single shock DCC, based on the two parameters, defibrillation threshold (DFT) and heterogeneity index (HI). DFT is the energy required to achieve a voltage gradient of 5 V/cm over 95% of the atrial myocardium. HI, calculated as the (95(th)-5(th))/50(th) percentile of atrial electric field magnitudes, is a measure of non-uniformity. The electric field distributions in the myocardium were generated for over five thousand different conventional and quadruple electrode placements with electrodes of two different sizes. Results show that there is a significant decrease in DFT (p0.01) and HI (p0.01) with increase in electrode size and quantity.
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Affiliation(s)
- D Konakanchi
- Department of Biomedical Engineering at the University of Memphis, TN 38152, USA.
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Lafuente-Lafuente C, Mouly S, Longas-Tejero MA, Bergmann JF. Antiarrhythmics for maintaining sinus rhythm after cardioversion of atrial fibrillation. Cochrane Database Syst Rev 2007:CD005049. [PMID: 17943835 DOI: 10.1002/14651858.cd005049.pub2] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Atrial fibrillation (AF) is the most frequent sustained arrhythmia. After restoration of normal sinus rhythm, the recurrence rate of AF is high. Antiarrhythmic drugs have been widely used to prevent recurrence, but the effect of these drugs on mortality and other clinical outcomes is unclear. OBJECTIVES To determine, in patients who recovered sinus rhythm after AF, the effect of long-term treatment with antiarrhythmic drugs on death, stroke and embolism, adverse effects, pro-arrhythmia and recurrence of AF. If several antiarrhythmics were effective our secondary aim was to compare them. SEARCH STRATEGY The Cochrane Central Register of Controlled Trials (CENTRAL) on The Cochrane Libary (Issue 2, 2005), MEDLINE (1950 to May 2005) and EMBASE (1966 to May 2005) were searched. The reference lists of retrieved articles, recent reviews and meta-analyses were checked. No language restrictions were applied. SELECTION CRITERIA Two independent reviewers selected randomised controlled trials comparing any antiarrhythmic with a control (no treatment, placebo or drugs for rate control) or with another antiarrhythmic, in adults who had AF and in whom sinus rhythm was restored. Post-operative AF was excluded. DATA COLLECTION AND ANALYSIS Two reviewers independently assessed quality and extracted data, on an intention-to-treat basis. Disagreements were resolved by discussion. Studies were pooled, if appropriate, using Peto odds ratio (OR). MAIN RESULTS 45 studies met inclusion criteria, comprising 12,559 patients. All results were calculated at 1 year of follow-up. Class IA drugs (disopyramide, quinidine) were associated with increased mortality compared with controls (OR 2.39, 95% confidence interval (CI) 1.03 to 5.59, P = 0.04, number needed to harm (NNH) 109, 95% CI 34 to 4985). Other antiarrhythmics did not modify mortality. Several class IA (disopyramide, quinidine), IC (flecainide, propafenone) and III (amiodarone, dofetilide, dronedarone, sotalol) drugs significantly reduced recurrence of AF (OR 0.19 to 0.60, number needed to treat 2 to 9), but all increased withdrawals due to adverse affects (NNH 17 to 36) and all but amiodarone and propafenone increased pro-arrhythmia (NNH 17 to 119). AUTHORS' CONCLUSIONS Several class IA, IC and III drugs are effective in maintaining sinus rhythm but increase adverse events, including pro-arrhythmia, and disopyramide and quinidine are associated with increased mortality. Any benefit on clinically relevant outcomes (embolisms, heart failure, mortality) remains to be established.
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Affiliation(s)
- C Lafuente-Lafuente
- Hôpital Lariboisière, Service de Médecine Interne A, 2, rue ambroise Paré, Paris, France, 75010.
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Hunt LC, de Jongh Curry AL. Finite element computer modeling of transthoracic atrial defibrillation. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2004:3964-7. [PMID: 17271165 DOI: 10.1109/iembs.2004.1404107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Placement of external electrodes can significantly affect the success rate of transthoracic atrial defibrillation, but studies have not led to agreement on optimal electrode placements. This study aims to (1) develop an anatomically realistic, finite element model of the human torso for external atrial defibrillation, (2) investigate model parameters of skeletal muscle conductivity and anisotropy and the presence of subcutaneous fat, and (3) investigate clinical defibrillation parameters of electrode size, shape, and location. The model predicts atrial defibrillation threshold (ADFT) energy by requiring a voltage gradient of 5 V/cm over at least 95% of atrial myocardium. The model compares favorably with a clinical study of 301 patients that reported an anterior-posterior electrode position required approximately 20% less energy than an anterior-anterior position. Results indicate that a change in electrode size has a different effect for different electrode placements. This study finds that variation in electrode placement by only a few centimeters can change ADFTs by up to 51%. This is the first computer model of transthoracic atrial defibrillation to our knowledge. Our computer model is not limited to a few empirically selected electrode placements as in clinical studies and can test any location, size, and number of electrode placements.
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Affiliation(s)
- L C Hunt
- Department of Biomedical Engineering, University of Memphis, Memphis, TN, USA
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Fuster V, Rydén LE, Cannom DS, Crijns HJ, Curtis AB, Ellenbogen KA, Halperin JL, Le Heuzey JY, Kay GN, Lowe JE, Olsson SB, Prystowsky EN, Tamargo JL, Wann S, Smith SC, Jacobs AK, Adams CD, Anderson JL, Antman EM, Halperin JL, Hunt SA, Nishimura R, Ornato JP, Page RL, Riegel B, Priori SG, Blanc JJ, Budaj A, Camm AJ, Dean V, Deckers JW, Despres C, Dickstein K, Lekakis J, McGregor K, Metra M, Morais J, Osterspey A, Tamargo JL, Zamorano JL. ACC/AHA/ESC 2006 Guidelines for the Management of Patients with Atrial Fibrillation: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation): developed in collaboration with the European Heart Rhythm Association and the Heart Rhythm Society. Circulation 2006; 114:e257-354. [PMID: 16908781 DOI: 10.1161/circulationaha.106.177292] [Citation(s) in RCA: 1381] [Impact Index Per Article: 76.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Nichol G, Huszti E, Rokosh J, Dumbrell A, McGowan J, Becker L. Impact of informed consent requirements on cardiac arrest research in the United States: exception from consent or from research? Resuscitation 2004; 62:3-23. [PMID: 15246579 DOI: 10.1016/j.resuscitation.2004.02.013] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2003] [Revised: 02/11/2004] [Accepted: 02/11/2004] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Research in patients with life-threatening illness such as cardiac arrest is challenging since they can not consent. The Food and Drug Administration addressed research under emergency conditions by publishing new criteria for exception from informed consent in 1996. We systematically reviewed randomized trials over a 10-year period to assess the impact of these regulations. METHODS Case-control study of published trials for cardiac arrest (cases) and atrial fibrillation (controls.) Studies were identified by using structured searches of MEDLINE and EMBASE from 1992 to 2002. Included were studies using random allocation in humans with cardiac arrest or atrial fibrillation prior to enrollment. Excluded were duplicate publications. Number of American trials, foreign trials and proportion of trials of American origin were compared by using regression analysis. Changes in cardiac arrest versus atrial fibrillation trials were calculated as risk differences. RESULTS Of 4982 identified cardiac arrest studies, 57 (1.1%) were randomized trials. The number of American cardiac arrest trials decreased by 15% (95% CI: 8, 22%) annually (P = 0.05). The proportion of cardiac arrest trials of American origin decreased by 16% (95% CI: 10, 22%) annually (P = 0.006). Of 5596 identified atrial fibrillation studies, 197 trials (3.5%) were randomized trials. The risk difference between cardiac arrest versus atrial fibrillation trials being of American origin decreased significantly (annual difference -5.8% (95% CI: -10, -0.1%), P = 0.03). INTERPRETATION Fewer American cardiac arrest trials were published during the last decade, when federal consent requirements changed. Regulatory requirements for clinical trials may inhibit improvements in care and threaten public health.
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Affiliation(s)
- G Nichol
- Clinical Epidemiology Program and Department of Medicine, University of Ottawa, ON, Canada.
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Galperín J, Elizari MV, Chiale PA, Molina RT, Ledesma R, Scapín AO, Blanco MV, Bonato R, Lago M. Pharmacologic reversion of persistent atrial fibrillation with amiodarone predicts long-term sinus rhythm maintenance. J Cardiovasc Pharmacol Ther 2003; 8:179-86. [PMID: 14506542 DOI: 10.1177/107424840300800302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The study analyzed the role of different variables that determine long-term sinus rhythm maintenance in patients with persistent atrial fibrillation who are treated with amiodarone. BACKGROUND It has been recognized that different factors influence long-term sinus rhythm preservation after the conversion of persistent atrial fibrillation. Although the duration of the arrhythmia appears to be the most important factor, consistent information regarding the role of the mode of arrhythmia conversion (pharmacologic or electric) is still lacking. METHODS One hundred and forty one anticoagulated patients with persistent atrial fibrillation (median duration 8 months, percentiles 25 and 75: 2-24) were treated for 4 weeks with oral amiodarone (600 mg/day). Those in whom the arrhythmia persisted underwent electric cardioversion. After restoration of normal sinus rhythm (either pharmacologic or electric), all patients received a daily dose of amiodarone (200 mg) and were followed for a median of 19 months (percentiles 25 and 75: 8-34 months). RESULTS Sixty eight patients (48.22%) regained sinus rhythm during the initial period of amiodarone treatment with 600 mg/day (Group I) and 73 (51.78%) required electric cardioversion (Group II). During the entire follow-up, atrial fibrillation relapsed in 63 patients: 17 (25%) in Group I and 46 (63%) in Group II. Recurrences of the arrhythmia were strikingly less frequent in patients whose atrial fibrillation lasted 12 months or less (33/103, 32.3%) than in those whose atrial fibrillation lasted more than 12 months (30/38, 78.94%). In the multivariate analysis, the mode of reversion (HR, 0.37; CI, 0.21-0.65) and the duration of the arrhythmia (HR, 2.55; CI, 1.54-4.20) were the determinants for long-term sinus rhythm maintenance. Age, sex, left atrium size, left ventricle diameter, and the shortening fraction did not significantly influence the rate of arrhythmia recurrence. Among the 141 patients included in the study, 113 patients were followed for at least 1 year, and cardiac rhythm was assessed at this time. Of these, only 1 of 48 patients (2.1%) in Group I was in atrial fibrillation, in marked contrast with 18 of 65 patients (27.8%) in Group II (RR, 0.075; 95% CI, 0.01-0.54). CONCLUSIONS In patients with persistent atrial fibrillation, long-term preservation of sinus rhythm under chronic amiodarone treatment may be anticipated when the arrhythmia lasts 12 months or less and/or its reversion is obtained pharmacologically. We may confidently assume that these two factors have a beneficial additive influence on the outcome.
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Petr P, Verner M, Van Wyk CJ, Koeleman HA, Svítil P, Kalová H. Amiodarone - excellent antiarrhythmic drug? (Happy end after 40 years of problems). J Appl Biomed 2003. [DOI: 10.32725/jab.2003.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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