forty-three of 67 antiarrhythmic regimens ( 64 % ) tested in the patients in whom ventricular tachycardia could not be induced after procainamide prevented induction of ventricular tachycardia , compared with 10 of 145 regimens ( 7 % ) tested in the patients in whom ventricular tachycardia could be induced after procainamide .
C0003195
antiarrhythmic
C0033216
procainamide