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Original Article
Volume 333:77-82 July 13, 1995 Number 2
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Amiodarone in Patients with Congestive Heart Failure and Asymptomatic Ventricular Arrhythmia
Steven N. Singh, Ross D. Fletcher, Susan Gross Fisher, Bramah N. Singh, H. Daniel Lewis, Prakash C. Deedwania, Barry M. Massie, Cindy Colling, Diane Lazzeri, for The Survival Trial of Antiarrhythmic Therapy in Congestive Heart Failure

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ABSTRACT

Background Asymptomatic ventricular arrhythmias in patients with congestive heart failure are associated with increased rates of overall mortality and sudden death. Amiodarone is now used widely to prevent ventricular tachycardia and fibrillation. We conducted a trial to determine whether amiodarone can reduce overall mortality in patients with congestive heart failure and asymptomatic ventricular arrhythmias.

Methods We used a double-blind, placebo-controlled protocol in which 674 patients with symptoms of congestive heart failure, cardiac enlargement, 10 or more premature ventricular contractions per hour, and a left ventricular ejection fraction of 40 percent or less were randomly assigned to receive amiodarone (336 patients) or placebo (338 patients). The primary end point was overall mortality, and the median follow-up was 45 months (range, 0 to 54).

Results There was no significant difference in overall mortality between the two treatment groups (P = 0.6). The two-year actuarial survival rate was 69.4 percent (95 percent confidence interval, 64.2 to 74.6) for the patients in the amiodarone group and 70.8 percent (95 percent confidence interval, 65.7 to 75.9) for those in the placebo group. At two years, the rate of sudden death was 15 percent in the amiodarone group and 19 percent in the placebo group (P = 0.43). There was a trend toward a reduction in overall mortality among the patients with nonischemic cardiomyopathy who received amiodarone (P = 0.07). Amiodarone was significantly more effective in suppressing ventricular arrhythmias and increased the left ventricular ejection fraction by 42 percent at two years.

Conclusions Although amiodarone was effective in suppressing ventricular arrhythmias and improving ventricular function, it did not reduce the incidence of sudden death or prolong survival among patients with heart failure, except for a trend toward reduced mortality among those with nonischemic cardiomyopathy.


Source Information

From the Department of Cardiology, Veterans Affairs Medical Center, Washington, D.C. (S.N.S., R.D.F., D.L.); Veterans Affairs Cooperative Studies Coordinating Center, Hines, Ill., and Loyola University Medical Center, Maywood, Ill. (S.G.F.); the Department of Cardiology, Wadsworth Veterans Affairs Medical Center, Los Angeles (B.N.S.); the Department of Cardiology, Veterans Affairs Medical Center, Kansas City, Mo. (H.D.L.); the Department of Cardiology, Veterans Affairs Medical Center, Fresno, Calif. (P.C.D.); the Department of Cardiology, Veterans Affairs Medical Center, San Francisco (B.M.M.); and the Cooperative Studies Program, Veterans Affairs Medical Center, Albuquerque, N.M. (C.C.).

Address reprint requests to Dr. Singh at the Division of Cardiology, Veterans Affairs Medical Center 1E301, 50 Irving St., NW, Washington, DC 20422.

Full Text of this Article


Related Letters:

Amiodarone in Congestive Heart Failure
Silver M. J., Young J., Topol E. J., Colli A., Sechi L. A., De Carli S., Bartoli E., Singh S. N., Fletcher R. D., Fisher S. G.
Extract | Full Text  
N Engl J Med 1995; 333:1639-1641, Dec 14, 1995. Correspondence

Implantable Defibrillators in Patients with Coronary Artery Disease at High Risk for Ventricular Arrhythmia
Clesham G. J., Petch M. C., Uretsky B. F., Moss A. J., Hall W. J., The MADIT Investigators
Extract | Full Text  
N Engl J Med 1997; 336:1676-1677, Jun 5, 1997. Correspondence

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