That acute coronary occlusion is often survived by years of active life has become a fact of common knowledge during the past ten years, but the extent to which recovery is possible and the longevity and strenuous activity that may ensue in some cases are but vaguely realized. I have been led to present herewith important and as yet unique information concerning this problem by the discovery at postmortem examination of a firm scar in the myocardium of a man, aged 80, who suffered a single typical attack of acute coronary occlusion at the age of 63, passed a life insurance examination easily two years later, was in such perfect health at 72 that he climbed mountains at a high rate of speed without symptoms, and finally succumbed to apoplexy without heart failure. When myocardial infarction from acute coronary occlusion was first described by pathologists, and for many years afterward,
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