to assess the short-term effects of a type ia agent on inducibility of ventricular tachyarrhythmia , cycle length , and hemodynamic tolerance , 16 of 20 patients in group 1 and all patients in group 2 underwent repeat programmed stimulation after the intravenous administration of procainamide during amiodarone therapy ( mean procainamide serum concentration 7.2 +/- 2.0 micrograms/ml ) .
C0042514
ventricular tachyarrhythmia
C0033216
procainamide