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Published on: July 7, 2016
[Digitalis and sinus rhythm. An old question that is still current]
Insights
Chronic digitalis therapy for heart failure in sinus rhythm shows questionable clinical benefit despite hemodynamic improvements. Withdrawing treatment may be possible for stable patients, but study limitations persist.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Congestive heart failure (CHF) management often involves digitalis.
- The efficacy of digitalis in patients with CHF and normal sinus rhythm remains debated.
Purpose of the Study:
- To evaluate the effectiveness of long-term digitalis treatment in CHF patients with sinus rhythm.
- To analyze clinical trials assessing digitalis therapy in this specific patient population.
Main Methods:
- Bibliographic search identifying 12 relevant clinical trials.
- Clinical and methodological analysis of the selected studies.
Main Results:
- Discrepancy observed between digitalis's hemodynamic effects and clinical symptom improvement in CHF patients.
- Many stable patients may tolerate discontinuation of chronic digitalis therapy without clinical decline.
- Methodological limitations in studies affect the reliability of digitalis efficacy data.
Conclusions:
- The long-term efficacy of digitalis in CHF patients with sinus rhythm is controversial.
- Findings suggest careful consideration for digitalis withdrawal in stable patients.
- Lessons from digitalis controversy are crucial for evaluating new inotropic agents.
Abstract:
To study the efficacy of chronic digitalis therapy in patients with congestive heart failure and sinus rhythm, a bibliographic search was fulfilled. 12 clinical trials were found and analyzed from a clinical and methodological point of view. These studies have shown a discrepancy between the clinical and haemodynamic efficacy of the drug. Usually patients' symptoms don't improve as it should be expected from the haemodynamic data. It is possible and advisable to withdraw a chronic treatment in many stable patients without worsening the clinical conditions. However some methodological bias (research strategies, patient selections, follow-up analysis and clinical and haemodynamic criteria) seem to reduce the results' reliability. The old question of digitalis efficacy in sinus rhythm is still controversial: new inotropic drugs are appearing. The lesson from the digitalis controversy should be seriously considered in the clinical evaluation of these new therapeutic agents.
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