although there was no antiarrhythmic effect on day 1 , metoprolol reduced the number of hours with warning arrhythmias ( greater than 30 ventricular ectopics/hour , any r/t ectopics or ventricular tachycardia ) on both days 5 ( 35 +/- 16 % vs 8 +/- 11 % ; p less than 0.05 ) and day 15 ( 13 +/- 37 % vs 4 +/- 13 % ; p less than 0.05 ) .
C0025859
metoprolol
C0042514
ventricular tachycardia