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Effectiveness of digoxin in reducing one-year mortality in chronic heart failure in the Digitalis Investigation Group trial.
- Source :
-
The American journal of cardiology [Am J Cardiol] 2009 Jan 01; Vol. 103 (1), pp. 82-7. Date of Electronic Publication: 2008 Oct 23. - Publication Year :
- 2009
-
Abstract
- Post hoc analyses of the Digitalis Investigation Group (DIG) trial indicate that digoxin at low (0.5 to 0.9 ng/ml) serum digoxin concentration (SDC) reduces mortality, which is eliminated at higher (>or=1 ng/ml) SDC, and that low-dose digoxin (<or=0.125 mg/day) predicts low SDC. In the DIG trial, patients with ambulatory chronic systolic and diastolic heart failure (HF) (n = 7,788) in normal sinus rhythm receiving angiotensin-converting enzyme inhibitors and diuretics were randomized to receive placebo (n = 3,899) or digoxin (n = 3,889). The median dose of digoxin (0.25 mg/day) and the target SDC (0.8 to 2.5 ng/ml) were higher than what are currently recommended, which in part may explain the lack of long-term mortality benefit of digoxin in the DIG trial. To test this hypothesis, we examined the effect of digoxin on short-term outcomes; 1-year all-cause mortality occurred in 392 and 448 patients respectively in the digoxin and placebo groups (hazard ratio for digoxin 0.87, 95% confidence interval [CI] 0.76 to 0.995, p = 0.043). Respective hazard ratios for cardiovascular and HF deaths were 0.87 (95% CI 0.76 to 1.01, p = 0.072) and 0.66 (95% CI 0.52 to 0.85, p = 0.001). All-cause hospitalization occurred in 1,411 and 1,529 patients receiving digoxin and placebo respectively (hazard ratio 0.89, 95% CI 0.83 to 0.96, p = 0.002). Respective hazard ratios for cardiovascular and HF hospitalizations were 0.82 (95% CI 0.75 to 0.89, p <0.0001) and 0.59 (95% CI 0.52 to 0.66, p <0.0001). In conclusion, digoxin reduced 1-year mortality and hospitalization in patients with chronic HF receiving angiotensin-converting enzyme inhibitors and diuretics. Randomized clinical trials are needed to determine the effect of low-dose digoxin in contemporary patients with chronic HF.
- Subjects :
- Aged
Canada epidemiology
Cause of Death trends
Chronic Disease
Dose-Response Relationship, Drug
Female
Follow-Up Studies
Humans
Male
Middle Aged
Survival Rate trends
Time Factors
Treatment Outcome
United States epidemiology
Cardiotonic Agents administration & dosage
Digoxin administration & dosage
Heart Failure drug therapy
Heart Failure mortality
Subjects
Details
- Language :
- English
- ISSN :
- 1879-1913
- Volume :
- 103
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- The American journal of cardiology
- Publication Type :
- Academic Journal
- Accession number :
- 19101235
- Full Text :
- https://doi.org/10.1016/j.amjcard.2008.06.068