Long-term results of DC reversion of atrial fibrillation.

Abstract

Follow-up studies for 2 yr. were made on 119 patients restored electrically to sinus rhythm alter various periods of atrial fibrillation. Of those units atrial fibrillation due to thyrotoxicosis (treated before reversion), 35% were still in sinus rhythm at 1 yr. and at 2 yr. The figures for the group with "lone" atrial fibrillation were 33% and 22%. Only 13% of those with rheumatic heart disease maintained sinus rhythm for 1 yr. and 9% for 2 yr. Attempts to restore sinus rhythm in these patients should be restricted to those 1st developing arrhythmia shortly after cardiac surgery. These conclusions rest on the lack of a safe and effective anti-arrhythmic drug, quinidine being too dangerous.