the efficacy and safety of flecainide , 200 mg twice daily , was compared with disopyramide , 150 mg 4 times daily , in a randomized , double-blind , crossover study in 25 patients ( 19 men and 6 women , aged 20 to 71 years , mean 52.5 ) with more than 1,000 ventricular premature complexes ( vpcs ) in a pretrial 24-hour holter monitoring screen .
C0012702
disopyramide
C0151636
ventricular premature complexes