we examined the effects of four antiarrhythmic drugs ( quinidine , disopyramide , procainamide and propranolol ) on sinus cycle length ( scl ) , sinoatrial conduction time ( sact ) measured by a constant atrial pacing technique , and atrial developed tension ( dt ) , using isolated blood-perfused dog atrial preparations .
C0003195
antiarrhythmic
C0034414
quinidine