Direct current conversion of atrial fibrillation.

Abstract

Direct current conversion was used in 175 patients in an attempt to abolish atrial fibrillation. This was successful in 137 (78%). The complications associated with this method are minimal. It was found that the duration of atrial fibrillation, cardiomegaly, and the presence of small fibrallatory waves on the electrocardiogram adversely affected the success rate of conversion. Digitalis toxicity may also diminish the chances of successful conversion. The questions of anticoagulation, of anesthesia, and of out-patient treatment are discussed. It is shown that neither quinidine nor K therapy diminish the chances of reversion to atrial fibrillation.