the cardiac arrhythmia pilot study , sponsored by the national heart , lung , and blood institute , is a multicenter , prospective , randomized , double-blind trial designed to identify patients having 10 or more ventricular premature complexes ( vpcs ) per hour within 6 to 60 days of acute myocardial infarction .
C0018787
heart
C0155626
acute myocardial infarction