Coronary angiography was performed in 95 patients 3 months to 3 years after a single myocardial infarction. The patients were categorized into 4 groups according to coronary angiography findings: group I with three or four vessels diseased; group II with two vessels diseased; group III with one vessel diseased, and group IV with normal arteries. Vessel disease was considered present if 50% of the lumen was narrowed. The patient population was almost equally distributed among group I (26), group II (26), group II (33) and group III (34). Group IV included only 3 patients in this retrospective study.