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Original Article
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Volume 358:2667-2677 June 19, 2008 Number 25
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Rhythm Control versus Rate Control for Atrial Fibrillation and Heart Failure
Denis Roy, M.D., Mario Talajic, M.D., Stanley Nattel, M.D., D. George Wyse, M.D., Ph.D., Paul Dorian, M.D., Kerry L. Lee, Ph.D., Martial G. Bourassa, M.D., J. Malcolm O. Arnold, M.D., Alfred E. Buxton, M.D., A. John Camm, M.D., Stuart J. Connolly, M.D., Marc Dubuc, M.D., Anique Ducharme, M.D., M.Sc., Peter G. Guerra, M.D., Stefan H. Hohnloser, M.D., Jean Lambert, Ph.D., Jean-Yves Le Heuzey, M.D., Gilles O'Hara, M.D., Ole Dyg Pedersen, M.D., Jean-Lucien Rouleau, M.D., Bramah N. Singh, M.D., D.Sc., Lynne Warner Stevenson, M.D., William G. Stevenson, M.D., Bernard Thibault, M.D., Albert L. Waldo, M.D., for the Atrial Fibrillation and Congestive Heart Failure Investigators

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ABSTRACT

Background It is common practice to restore and maintain sinus rhythm in patients with atrial fibrillation and heart failure. This approach is based in part on data indicating that atrial fibrillation is a predictor of death in patients with heart failure and suggesting that the suppression of atrial fibrillation may favorably affect the outcome. However, the benefits and risks of this approach have not been adequately studied.

Methods We conducted a multicenter, randomized trial comparing the maintenance of sinus rhythm (rhythm control) with control of the ventricular rate (rate control) in patients with a left ventricular ejection fraction of 35% or less, symptoms of congestive heart failure, and a history of atrial fibrillation. The primary outcome was the time to death from cardiovascular causes.

Results A total of 1376 patients were enrolled (682 in the rhythm-control group and 694 in the rate-control group) and were followed for a mean of 37 months. Of these patients, 182 (27%) in the rhythm-control group died from cardiovascular causes, as compared with 175 (25%) in the rate-control group (hazard ratio in the rhythm-control group, 1.06; 95% confidence interval, 0.86 to 1.30; P=0.59 by the log-rank test). Secondary outcomes were similar in the two groups, including death from any cause (32% in the rhythm-control group and 33% in the rate-control group), stroke (3% and 4%, respectively), worsening heart failure (28% and 31%), and the composite of death from cardiovascular causes, stroke, or worsening heart failure (43% and 46%). There were also no significant differences favoring either strategy in any predefined subgroup.

Conclusions In patients with atrial fibrillation and congestive heart failure, a routine strategy of rhythm control does not reduce the rate of death from cardiovascular causes, as compared with a rate-control strategy. (ClinicalTrials.gov number, NCT00597077 [ClinicalTrials.gov] .)


Source Information

From the Montreal Heart Institute and the Université de Montréal, Montreal (D.R., M.T., S.N., M.G.B., M.D., A.D., P.G.G., J.L., J.-L.R., B.T.); Libin Cardiovascular Institute, Calgary, AB, Canada (D.G.W.); St. Michael's Hospital, Toronto (P.D.); Duke University Medical Center, Durham, NC (K.L.L.); London Health Sciences Center, London, ON, Canada (J.M.O.A.); Rhode Island Hospital–Lifespan Academic Center, Providence, RI (A.E.B.); St. George's Hospital Medical Center, London (A.J.C.); Population Health Research Institute, Hamilton, ON, Canada (S.J.C.); J.W. Goethe University, Frankfurt, Germany (S.H.H.); Hôpital Européen Georges Pompidou, Paris (J.-Y.L.H.); Institut de Cardiologie de Québec, QC, Canada (G.O.); Bispebjerg University Hospital, Copenhagen (O.D.P.); Veterans Affairs Medical Center–West Los Angeles, Los Angeles (B.N.S.); Brigham and Women's Hospital, Boston (L.W.S., W.G.S.); and University Hospitals Case Medical Center, Cleveland (A.L.W.).

Address reprint requests to Dr. Roy at the Montreal Heart Institute, 5000 Belanger St., Montreal, QC H1T 1C8, Canada, or at d_roy{at}icm-mhi.com.

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Related Letters:

Rhythm Control versus Rate Control for Atrial Fibrillation
Knecht S., O'Neill M. D., Verbeet T., Roy D., Talajic M., Nattel S.
Extract | Full Text | PDF  
N Engl J Med 2008; 359:1522, Oct 2, 2008. Correspondence

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