In consecutive patients hospitalized with acute myocardial infarction, infarct location according to routine electrocardiogram is of minor importance for the outcome.

Abstract

Most studies have suggested that patients with anterior myocardial infarction have an adverse prognosis compared with patients with inferior infarction. The objective of this study was to compare the mortality and morbidity in anterior versus inferior acute myocardial infarction (AMI) during 1 year in a consecutive series of patients hospitalized with AMI. All patients fulfilling the criteria for AMI who were admitted to a single hospital during 21 months (n = 921) participated in the study. Patients with anterior infarction (n = 312) had a 1-year mortality rate of 26% versus a rate of 24% for patients with inferior infarction (n = 269) (p > 0.2). The corresponding figures for patients with no previous infarction who developed Q waves were 27 and 21%, respectively (p > 0.2). Reinfarction, thromboembolic events, and other aspects of morbidity during long-term follow-up appeared with similar frequency in the two groups. Thus, in a nonselected group of patients admitted to a single hospital because of AMI, the prognosis was found to be similar among patients with inferior and those with anterior infarction. In the subset of patients with a first myocardial infarction who developed Q waves, there was a trend indicating higher mortality in anterior infarction.