Current cardiac screening tools used to prevent myocardial infarction (MI) failed to identify nearly half of people who are at risk for MI, according to a new study. Those patients had low or borderline risk as per both standard and newer risk calculators for atherosclerotic cardiovascular disease (ASCVD). Most developed symptoms within 48 hours before the event, and many would not have been recommended statins or further testing if evaluated 2 days earlier.

Nearly half of adults with a first myocardial infarction show low or borderline risk on current risk estimators. Most develop symptoms only within 48 hours and would not qualify for statins earlier.