twenty-six of these patients , who had ventricular fibrillation during single-drug therapy with quinidine , procainamide , or disopyramide , were compared with a control group of 62 patients who had been treated similarly for ventricular arrhythmias but did not have ventricular fibrillation during treatment .
C0085612
ventricular arrhythmias
C0042510
ventricular fibrillation