Analysis of circadian variation of acute myocardial infarction: afternoon predominance in Turkish population

Summary Background: Although data about circadian variation of myocardial infarction (MI) in western populations reveal morning peak between 06:00 and 12:00 hours, differences have been reported in different regions of the world and ethnic groups. We aimed to evaluate circadian variation of MI in a Turkish cohort. Methods: A total of 476 patients (mean age 56.7 ± 11.7; 80% men) with acute st elevation MI were included into the study. Patients were categorised into four 6‐h increments (00:01–06:00; 06:01–12:00; 12:01–18:00 and 18:01–24:00 hours). Results: Onset of MI exhibited significant circadian variation among four time periods (p