title: [Statistical survey of the hourly incidence of acute myocardial infarction: reduction of frequency during the nighttime hours].
abstract: The time of onset of acute myocardial infarction was analysed in 245 patients admitted to the Fatebenefratelli Hospital in Milan over 18 months. A significant decrease in the incidence of this pathology (P less than 0.01) was noted between midnight and 6 am. No significant difference was noted over the rest of the day. These results suggest the existence of a period of relative protection against the onset of myocardial infarction during the day.
mesh_terms: D006801:Humans; D007558:Italy; D009203:Myocardial Infarction / Q000453:epidemiology*; D013997:Time Factors
vernacular_title: Rilevazione statistica dell'incidenza oraria dell'infarto miocardico acuto: riduzione di frequenza nelle ore notturne.