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[Should chronic atrial fibrillation be treated with digoxin?]
1Astra-Gruppen A/S, Albertslund, Medicinsk afdeling.
Insights
Digoxin was the sole treatment for atrial fibrillation, but calcium-channel blockers and beta-blockers now offer better ventricular function control. Combining digoxin with these agents improves atrial fibrillation management during rest and exercise.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Atrial fibrillation treatment historically relied solely on digoxin.
- Digoxin's limitation: ventricular function control only at rest.
Purpose of the Study:
- To review the etiology and electrophysiology of atrial fibrillation.
- To evaluate calcium-channel blockers and beta-blockers in atrial fibrillation management.
- To assess drug effects on heart rate control during exercise.
Main Methods:
- Review of existing literature on atrial fibrillation treatments.
- Analysis of the effects of digoxin, calcium-channel blockers, and beta-blockers.
- Examination of drug efficacy during rest and exercise.
Main Results:
- Calcium-channel blockers and beta-blockers allow ventricular function control at rest and during exercise.
- Digoxin alone only controls ventricular function at rest.
- Combined therapy shows promise for improved atrial fibrillation management.
Conclusions:
- Current therapeutic strategies for atrial fibrillation should be re-evaluated.
- Combination therapy with digoxin and calcium-channel blockers/beta-blockers is recommended.
- This approach offers enhanced heart rate control during rest and exercise.
Abstract:
For decades, atrial fibrillation was treated exclusively with digoxin. The introduction of Ca-antagonists and beta-blockers has, however, produced valuable alternatives as ventricular function can now be controlled both at rest and during exercise whereas, with digoxin, ventricular function could only be controlled at rest. This review deals with the etiology and electrophysiology of atrial fibrillation together with the effects of Ca-antagonists and beta-blockers on conduction and control of the heart rate during exercise. Documentation of the effects of the different drugs, separately and combined, in the treatment of atrial fibrillation during rest and exercise is presented. It is concluded that alteration in the therapeutic strategy appears reasonable in favour of a combination of digoxin and also Ca-antagonists/beta-blocker.