Subendocardial myocardial infarction.
Sixty-one consecutive patients with acute subendocardial myocardial infarction (SEAMI) and 223 consecutive patients with transmural infarction (TMI) seen in a coronary care unit were followed for one year. All patients were less than 70 years of age. The patients with SEAMI had a higher frequency of previous infarction (34% vs 21%, p less than 0.025), less cardiac failure (44% vs 65%, p less than 0.005), and were more often free from arrhythmias (61% vs 31%, p less than 0.001) than patients with TMI. Hospital mortality was less in patients with SEAMI (0% vs 8%, p less than 0.05) but total mortality to one year was similar (15% vs 17%). Amongst patients with SEAMI, two died within two weeks of infarction but all other deaths occurred at least six weeks after infarction. Patients with SEAMI and a history of previous infarction had a higher one year mortality than patients without such a history (29% vs 7%, p less than 0.05). Coronary angiography with a view to coronary artery surgery should be considered in the former group.
D000368:Aged; D001145:Arrhythmias, Cardiac / Q000209:etiology; D006333:Heart Failure / Q000209:etiology; D006760:Hospitalization; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000145:classification / Q000150:complications / Q000401:mortality*; D011379:Prognosis; D012008:Recurrence; D012189:Retrospective Studies; D013997:Time Factors