in a double-blind placebo-controlled trial to study the effect of nifedipine on ventricular arrhythmias among patients with acute myocardial infarction , 434 patients with suspected myocardial infarction were randomized within 6 h from the onset of chest pain to treatment with nifedipine ( p = 217 ) or placebo ( p = 217 ) .
C0027051
myocardial infarction
C0028066
nifedipine