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Rate control therapy for atrial fibrillation following coronary artery bypass surgery
Insights
Atrial fibrillation (AF) after heart surgery is common. A rate control strategy using digoxin, with or without verapamil, effectively restored normal sinus rhythm in over 90% of patients post-coronary artery bypass surgery.
Area of Science:
- Cardiology
- Cardiac Surgery
- Electrophysiology
Background:
- Atrial fibrillation (AF) frequently complicates coronary artery bypass surgery (CABS).
- Conventional antiarrhythmic drugs carry a risk of proarrhythmia.
- Rate control offers an alternative therapeutic strategy for post-operative AF.
Purpose of the Study:
- To evaluate the efficacy of a rate control approach for managing AF in patients following CABS.
- To assess the effectiveness of digoxin, with or without verapamil, in restoring normal sinus rhythm.
Main Methods:
- A cohort of 59 patients who underwent CABS and developed AF were treated.
- The treatment regimen involved digoxin, with the addition of verapamil in some cases.
- Patient rhythm status was monitored for spontaneous conversion to normal sinus rhythm.
Main Results:
- Spontaneous conversion to normal sinus rhythm was observed in 55 out of 59 patients (approximately 93%).
- At two to four weeks post-treatment, over 90% of patients maintained normal sinus rhythm.
- Digoxin was continued in all patients, with 12% also on verapamil at follow-up.
Conclusions:
- A rate control strategy using digoxin, with or without verapamil, is highly effective for treating AF post-CABS.
- This approach achieves a high rate of conversion and sustained normal sinus rhythm.
- Rate control provides a safe and effective alternative to conventional antiarrhythmic therapy in this patient population.
Abstract:
Atrial fibrillation (AF) is a common complication of coronary artery bypass surgery (CABS). Because conventional antiarrhythmic therapy may cause proarrhythmia, a rate control approach to AF was evaluated in 59 patients post-CABS. The use of digoxin with or without verapamil for AF was associated with spontaneous conversion to normal sinus rhythm in 55 of 59 patients. Two to four weeks later, all patients were on digoxin and 12% were on verapamil, with two of four AF patients having converted to normal sinus rhythm and two others previously in normal sinus rhythm now in AF. A rate control approach to treating AF post-CABS resulted in over 90% of patients being in normal sinus rhythm for two to four weeks after the onset of the arrhythmia.