G. Perry et al., THE EFFECT OF DIGOXIN ON MORTALITY AND MORBIDITY IN PATIENTS WITH HEART-FAILURE, The New England journal of medicine, 336(8), 1997, pp. 525-533
Background The role of cardiac glycosides in treating patients with ch
ronic heart failure and normal sinus rhythm remains controversial. We
studied the effect of digoxin on mortality and hospitalization in a ra
ndomized, double-blind clinical trial. Methods In the main trial, pati
ents with left ventricular ejection fractions of 0.45 or less were ran
domly assigned to digoxin (3397 patients) or placebo (3403 patients) i
n addition to diuretics and angiotensin-converting-enzyme inhibitors (
median dose of digoxin, 0.25 mg per day; average follow-up, 37 months)
. In an ancillary trial of patients with ejection fractions greater th
an 0.45, 492 patients were randomly assigned to digoxin and 496 to pla
cebo. Results In the main trial, mortality was unaffected. There were
1181 deaths (34.8 percent) with digoxin and 1194 deaths (35.1 percent)
with placebo (risk ratio when digoxin was compared with placebo, 0.99
; 95 percent confidence interval, 0.91 to 1.07; P = 0.80). In the digo
xin group, there was a trend toward a decrease in the risk of death at
tributed to worsening heart failure (risk ratio, 0.88; 95 percent conf
idence interval, 0.77 to 1.01; P = 0.06). There were 6 percent fewer h
ospitalizations overall in that group than in the placebo group, and f
ewer patients were hospitalized for worsening heart failure (26.8 perc
ent vs. 34.7 percent; risk ratio, 0.72; 95 percent confidence interval
, 0.66 to 0.79; P < 0.001). In the ancillary trial, the findings regar
ding the primary combined outcome of death or hospitalization due to w
orsening heart failure were consistent with the results of the main tr
ial. Conclusions Digoxin did not reduce overall mortality, but it redu
ced the rate of hospitalization both overall and for worsening heart f
ailure. These findings define more precisely the role of digoxin in th
e management of chronic heart failure. (C) 1997, Massachusetts Medical
Society.