Abstract
The aim of the present paper was to ascertain whether or not there is a seasonal trend in the incidence of acute myocarcial infarction (AMI) in Stockholm. The material consisted of hospitalized patients with a diagnosis of AMI, recorded in a medical information system, and of deaths recorded in the cause-of-death register. The hospital stays and the deaths together totalled 4020 cases of AMI occurring in 1973. In contrast to the results of other studies, no seasonal trend was found.

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