in order to compare the relative efficacy of quinidine , disopyramide and a placebo in the maintenance of sinus rhythm after cardioversion from atrial fibrillation and in order to examine the incidence of side-effects , 82 patients with continuous atrial fibrillation ( duration more than 1 month but less than 3 years ) were randomized in a double-blind fashion to receive quinidine , disopyramide or placebo .
C0004238
atrial fibrillation
C0012702
disopyramide