we screened 3143 patients with ischemic pain of greater than 45 min duration and randomly assigned 105 eligible patients with threatened myocardial infarction and 66 with acute myocardial infarction to receive nifedipine ( 20 mg orally every 4 hr for 14 days ) or placebo plus standard care .
C0027051
myocardial infarction
C0028066
nifedipine