摘要(Abstract)：

<正> 26 cases of an initial AMI who Were admitted to our hospital and who wereunder or 40 years of age(Group A)were compared to 29 patients over 60admitted during the same time because of die same reason(Group B).Group Ahad significant fewer patients with hypertention and diabetes mellitus,and morewith positive family history.Smoking was the most common risk factor in bothgroups,but there was no statistical difference between them as well ashyperlipidamia.But cigarette consumption per day in group A was much morethen that in group B.Location of infarction was most common in anterior wallin group A.In group B it was similar to inferior wall.Coronary angiographywas performed in 17 patients in group A.Most of them had single-vessel diseaseand of the left anterior descending was most commonly involved.Three of themwere found with normal coronary arteries in angiography.In group B there weremore than half of multiple vessel disease.

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