This article is about the effect of cardioversion treatment with quinidine and electrode defibrillation in 109 patients with atrial fibrillation(Af) in rheumatic heart disease from Jan. 1981 to Aug. 1989.Among these patients

40 had been treated with valve replacement (VR).the other 69 without VR.The results showed. (1) In the group after VR

the sinus rhythm was restored in 38 cases at once

showing an effective rate of 95%.The Af repetition rate was 7.8% in one month and 0.48 gram quinidine was used daily to strengthen the sinus rhythm.(2) In the other group

the sinus rhythm was restored in 60 cases at once with a 86.9% effective rate. In one month

the Af repetition rate was 28.3%.The quinidine daily dose 0.58 gram was required to strnegthen the sinus rhythm. ( 3 )The quinidine syncope occurred in two cases without VR