standard microelectrode techniques were used to study the effects of class ia ( quinidine , disopyramide , procainamide ) , ib ( lignocaine , mexiletine , tocainide ) and ic ( flecainide , encainide , lorcainide ) antiarrhythmic drugs on action potentials in spontaneously beating sino-atrial node cells from guinea-pigs .
C0033216
procainamide
C0003195
antiarrhythmic drugs