the effects of the intravenous administration of three drugs , i.e. , verapamil , disopyramide , and procainamide , on paroxysmal supraventricular tachycardia ( psvt ) , atrial fibrillation ( af ) and atrial flutter ( af ) were evaluated electrophysiologically .
C0012702
disopyramide
C0004238
atrial fibrillation