Ablation Versus Drug Therapy for Atrial Fibrillation in Heart Failure: Results From the CABANA Trial.

Abstract

Background

In patients with heart failure and atrial fibrillation (AF), several clinical trials have reported improved outcomes, including freedom from AF recurrence, quality of life, and survival, with catheter ablation. This article describes the treatment-related outcomes of the AF patients with heart failure enrolled in the CABANA trial (Catheter Ablation Versus Antiarrhythmic Drug Therapy for Atrial Fibrillation).

Methods

The CABANA trial randomized 2204 patients with AF who were ≥65 years old or <65 years old with ≥1 risk factor for stroke at 126 sites to ablation with pulmonary vein isolation or drug therapy including rate or rhythm control drugs. Of these, 778 (35%) had New York Heart Association class >II at baseline and form the subject of this article. The CABANA trial's primary end point was a composite of death, disabling stroke, serious bleeding, or cardiac arrest.

Results

Of the 778 patients with heart failure enrolled in CABANA, 378 were assigned to ablation and 400 to drug therapy. Ejection fraction at baseline was available for 571 patients (73.0%), and 9.3% of these had an ejection fraction <40%, whereas 11.7% had ejection fractions between 40% and 50%. In the intention-to-treat analysis, the ablation arm had a 36% relative reduction in the primary composite end point (hazard ratio, 0.64 [95% CI, 0.41-0.99]) and a 43% relative reduction in all-cause mortality (hazard ratio, 0.57 [95% CI, 0.33-0.96]) compared with drug therapy alone over a median follow-up of 48.5 months. AF recurrence was decreased with ablation (hazard ratio, 0.56 [95% CI, 0.42-0.74]). The adjusted mean difference for the AFEQT (Atrial Fibrillation Effect on Quality of Life) summary score averaged over the entire 60-month follow-up was 5.0 points, favoring the ablation arm (95% CI, 2.5-7.4 points), and the MAFSI (Mayo Atrial Fibrillation-Specific Symptom Inventory) frequency score difference was -2.0 points, favoring ablation (95% CI, -2.9 to -1.2).

Conclusions

In patients with AF enrolled in the CABANA trial who had clinically diagnosed stable heart failure at trial entry, catheter ablation produced clinically important improvements in survival, freedom from AF recurrence, and quality of life relative to drug therapy. These results, obtained in a cohort most of whom had preserved left ventricular function, require independent trial verification. Registration: URL: https://www.clinicaltrials.gov/ct2/show/NCT00911508; Unique identifier: NCT0091150.

Department

Description

Provenance

Citation

Published Version (Please cite this version)

10.1161/circulationaha.120.050991

Publication Info

Packer, Douglas L, Jonathan P Piccini, Kristi H Monahan, Hussein R Al-Khalidi, Adam P Silverstein, Peter A Noseworthy, Jeanne E Poole, Tristram D Bahnson, et al. (2021). Ablation Versus Drug Therapy for Atrial Fibrillation in Heart Failure: Results From the CABANA Trial. Circulation, 143(14). pp. 1377–1390. 10.1161/circulationaha.120.050991 Retrieved from https://hdl.handle.net/10161/31125.

This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.

Scholars@Duke

Piccini

Jonathan Paul Piccini

Professor of Medicine

Jonathan P. Piccini, MD, MHS, FACC, FAHA, FHRS is a clinical cardiac electrophysiologist and Professor of Medicine at Duke University Medical Center and the Duke Clinical Research Institute. He is the Director of the Cardiac Electrophysiology section at the Duke Heart Center. His focus is on the care of patients with atrial fibrillation and complex arrhythmias, with particular emphasis on catheter ablation and lead extraction. His research interests include the development and evaluation of innovative cardiovascular interventions for the treatment heart rhythm disorders. He has served as the chairman for several national and international clinical trials and registries, including the American Heart Association-Get with the Guidelines Atrial Fibrillation program. He is an Associate Editor at JACC: Clinical Electrophysiology and is an elected member of the American Society for Clinical Investigation. Dr. Piccini has more than 550 publications in the field of heart rhythm medicine and has been the recipient of several teaching and mentorship awards.

Al-Khalidi

Hussein Rashid Al-Khalidi

Professor of Biostatistics & Bioinformatics

My research interest includes design and analysis of cardiovascular clinical trials, medical devices, survival analysis, group-sequential analysis, time-to-recurrent or multiple events, continuous-time Markov models, stochastic process, linear model, dose-response modeling, design of experiments and adaptive designs.

Bahnson

Tristram Dan Bahnson

Professor of Medicine
Lee

Kerry L. Lee

Professor Emeritus of Biostatistics & Bioinformatics

As a faculty-level biostatistician, my research activities are focused on the statistical and data coordination aspects of several large multicenter clinical trials, and on statistical issues in the design and analysis of collaborative clinical research projects associated with the Duke University Cardiovascular Disease Database. I am currently the principal investigator of the statistical and data coordinating center for two NIH-sponsored multicenter randomized clinical trials, namely (1) the Pacemaker Mode Selection Trial, a 2000 patient study of dual chamber versus single chamber pacing in patients with sinus node dysfunction, and (2) the Sudden Cardiac Death in heart Failure Trial a 2,500 patient, three-arm randomized trial of implantable defibrillator therapy or amiodarone versus conventional therapy in patients with class II or III congestive heart failure. During the past year my colleagues and I have completed a third trial sponsored by the NIH for which I was the principal investigator of the data coordinating center. This trial assessed the efficiency of electrophy siologic-guided antiarrhythmic therapy in patients at risk for sudden cardiac death. I also serve as the statistical director and principal statistician for the following major clinical trials:

(1) Symphony II, a 7,000 patient randomized trial of long-term oral platelet inhibition therapy in patients following an acute coronary syndrome, sponsored by Hoffman-LaRoche.

(2) PARAGON B, a 5,200 patient trial of platelet inhibition therapy in patients with unstable angina, also sponsored by Hoffman-LaRoche.

Methodologically, my research activities are focused on the analytic and design issues associated with clinical trials, on regression modeling strategies for risk assessment with logistic and proportional hazards regression models, and on methods for validating prognostic models and assessing probabilistic predictions.

Mark

Daniel Benjamin Mark

Professor of Medicine

Dr. Mark is a clinical cardiologist with the rank of Professor of Medicine (with tenure) as well as Vice Chief for Academic Affairs in the Division of Cardiology, Department of Medicine at Duke University Medical Center. He is also the Director of Outcomes Research at the Duke Clinical Research Institute. He has been on the full-time faculty at Duke since 1985. Prior to that he completed his cardiology fellowship at Duke, his residency and internship at the University of Virginia Hospital, and received his medical degree from Tufts University and his Master’s degree from Harvard. In 1998, he was given the honor of being elected to the American Society for Clinical Investigators and in 2002 he was honored by election to the Association of American Physicians. These organizations are the two most prestigious honor societies in academic medicine. In 2009, Dr. Mark was awarded the American College of Cardiology Distinguished Scientist Award.

Dr. Mark's major research interests include medical economics and quality of life outcomes, outcomes research, and quality of medical care. Currently, Dr. Mark is directing a number of outcomes analyses for ongoing clinical trials including PROMISE (anatomic versus functional testing for coronary artery disease, NIH), CABANA (catheter ablation versus antiarrhythmic drug therapy for atrial fibrillation, NIH), ISCHEMIA (percutaneous coronary intervention versus optimal medical therapy for moderate-severe ischemia), and STICH (CABG +/- ventricular reconstruction versus medical therapy for ischemic heart disease, NIH). He was the principal author of the AHCPR Unstable Angina Guidelines and is a co-author of both the American College of Cardiology Guideline on Exercise Testing and their Coronary Stent Consensus Guideline. He is also the Editor of the American Heart Journal. Dr. Mark has published over 270 peer-reviewed articles, two books, and 80 book chapters. He lectures widely in the US, as well as in Canada, South America, and Europe.

Keywords: cost-effectiveness analysis, disease management, quality of life assessment, resource use.


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