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Blinded withdrawal of randomized treatment with low-dose digoxin or placebo in heart failure: the DECISION trial
Peter van der Meer1, Dirk J van Veldhuisen1, Geert H D Voordes1
1Department of Cardiology, University Medical Centre Groningen, University of Groningen, PO Box 30.001, Groningen 9700RB, The Netherlands.
Insights
Stopping digoxin in heart failure (HF) patients on optimal medical therapy is unsafe. Digoxin withdrawal significantly increased adverse events and clinical deterioration, highlighting the need for caution.
Area of Science:
- Cardiology
- Pharmacology
- Clinical Medicine
Background:
- The safety of discontinuing digoxin in heart failure (HF) patients receiving guideline-recommended therapy is not well-established.
- This study analyzes data from the DECISION trial to assess outcomes after blinded digoxin withdrawal.
Purpose of the Study:
- To evaluate the safety and clinical outcomes associated with digoxin withdrawal in patients with heart failure (HF) optimized on contemporary medical therapy.
Main Methods:
- The DECISION trial randomized 1001 patients to digoxin or placebo.
- A subset of 587 patients on active treatment underwent blinded withdrawal of digoxin or placebo, with follow-up at six weeks.
- All cardiovascular events were adjudicated by an independent committee.
Main Results:
- Digoxin withdrawal led to a significant increase in cardiovascular death or worsening heart failure events (42.8 vs. 5.9 events per 100 patient-years; P=0.036).
- Patients withdrawing from digoxin experienced a 7.37-fold increased risk of adverse events compared to placebo withdrawal (P=0.012).
- Digoxin withdrawal was associated with increased heart rate, decreased systolic blood pressure, and elevated NT-proBNP levels.
Conclusions:
- Discontinuation of digoxin in patients with heart failure (HF) and reduced or mildly reduced ejection fraction, even after long-term treatment, is linked to clinical deterioration.
- These findings underscore the importance of caution when considering stopping digoxin therapy in this patient population.
Background And Aims:
Whether digoxin withdrawal is safe in patients with heart failure (HF) optimized on contemporary guideline-recommended medical therapy remains unknown. This pre-specified analysis of the DECISION trial evaluated outcomes following blinded withdrawal of digoxin or placebo.
Methods:
In DECISION, 1001 patients were randomized to low-dose digoxin or placebo and treated for a median of 36.5 months. At the end of the study, 587 patients on active treatment (digoxin 288 and placebo 299) underwent blinded withdrawal with an in-person follow-up visit at 6 weeks. All events were adjudicated.
Results:
During the pre-withdrawal phase (100 days), incidence rates of cardiovascular (CV) death or worsening HF events were 5.7 vs 6.5 events per 100 patient-years in the digoxin vs placebo group; rate ratio (RR) 0.88; 95% confidence interval (CI) [0.24-3.10]. Following withdrawal, the incidence rate increased markedly in patients withdrawn from digoxin but not placebo (42.8 vs 5.9 events per 100 patient-years; time period-by-treatment interaction, P = .036). Fourteen events (12 hospitalizations and 2 urgent HF visits) occurred in the digoxin withdrawal arm vs two (one HF hospitalization and one CV death) in the placebo withdrawal arm (RR 7.37, 95% CI 1.56-34.88; P = .012). Withdrawal of digoxin was accompanied by an increase in heart rate (P = .003), reduction in systolic blood pressure (P = .014), and rise in NT-proBNP (P = .002).
Conclusions:
Discontinuation of digoxin after long-term treatment is associated with clinical deterioration in patients with HF and a reduced or mildly reduced ejection fraction. These findings warrant caution when stopping digoxin.
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