Why the study?
Does the site of myocardial infarction influence mortality rate in patients with MI?
Does the site of myocardial infarction influence mortality rate in patients with MI?
The location of myocardial infarction, particularly anteroseptal and indefinite locations, as well as the presence of bundle branch block, are associated with higher mortality rates.
MI location was associated with mortality differences; leaves open whether site informs risk stratification.
The influence of the location of infarction, determined by electrocardiography, on mortality in a series of 864 patients with myocardial infarction has been studied restrospectively. 183 of these patients died (21.2%); 136 were autopsied and the location of the infarction was determined histologically. On the basis of the ECG findings the material was divided into anteroseptal, anterior, posterior and indefinite groups. Mortality in the indefinite group was 38.0%, anteroseptal group 23.8, anterior 22.8 and posterior 14.2%. In view of the autopsy results it would seem that the mortality rate for anteroseptal infarction is higher than that for anterior or posterior infarction. Diabetes and hypertension did not, in the present series, affect the infarction mortality, whereas bundle branch block seen in the ECG distinctly increased the mortality.
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Isomäki et al. (1969) studied this question.