Less myocardial infarctions during summer vacation: More on mondays and winter holidays

Time periods by calendar related to perceived stress are associated with the incidence rate of myocardial infarction (MI), says a new registry study of 156,000 people of the Swedish population. Compared to control days, the daily incidence rate of MI was higher during the winter holidays, and on Mondays, whereas rates were lower during weekends and during the summer vacation in July. These periods coincide well with perceived high and low stress in society, respectively.