COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
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Comparison of pharmacological and electrical cardioversion in permanent atrial fibrillation after prosthetic cardiac valve replacement: a prospective randomized trial.

OBJECTIVE: To compare the efficacy of electrical versus pharmacological cardioversion following prosthetic cardiac valve replacement in patients with permanent atrial fibrillation (AF).

METHODS: Patients with permanent AF who had undergone prosthetic cardiac valve replacement, who had a cardiothoracic ratio ≤ 0.5 and a left atrial diameter ≤ 50 mm for ≥ 6 months after surgery were randomly divided to receive either electrical or pharmacological cardioversion. Patients in the electrical cardioversion group were given direct-current synchronized electrical defibrillation under general anaesthesia. Patients in the pharmacological cardioversion group were given oral combination therapy with amiodarone, captopril and simvastatin for 3 months.

RESULTS: A total of 115 patients received either electrical cardioversion (n = 59) or pharmacological cardioversion (n = 56); reversion to sinus rhythm occurred in 98.3% and 26.8%, respectively. Recurrence rates were similar in the two groups (3.4% and 6.7% for electrical and pharmacological cardioversion, respectively). No deaths or severe complications were reported.

CONCLUSION: Electrical cardioversion has a favourable safety profile and appears to be a more effective method than pharmacological cardioversion for the treatment of permanent AF after cardiac valve replacement, once the heart has returned close to its normal size.

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