in 18 animals pretreated with procainamide ( 0.5 mg.kg-1.min-1 for 50 min ) , there was no effect on the ventricular arrhythmia in terms of ectopic frequency ( 1020 +/- 180 pvcs per hour ) , time to onset of arrhythmia , duration of arrhythmia , and mortality incidence ( ie 16.7 % ) .
C0085612
ventricular arrhythmia
C0003811
arrhythmia