a myocardial infarction that involves the innermost layer and, in some cases, parts of the middle layer of the myocardium but does not extend to the epicardium.
POPULATION Inclusion required hospital admission between January 1, 1998, and June 30, 1999, and a diagnosis of acute MI or subendocardial infarction.
Inclusion criteria for entering the cohort included admission to a TriHealth hospital during an 18-month period between January 1, 1998, and June 30, 1999, and a discharge diagnosis of acute MI or subendocardial infarction.