Daylight saving time shifts and incidence of acute myocardial infarction--Swedish Register of Information and Knowledge About Swedish Heart Intensive Care Admissions (RIKS-HIA).

Abstract in brief

• The study investigates how daylight saving time shifts, especially the spring transition, might temporarily increase the risk of heart attacks (acute myocardial infarction or AMI), with a notable rise in the week after the spring shift, particularly among those on cardiac medications or with low cholesterol.
• There was no significant change in AMI incidence after the autumn shift, and smokers did not show increased risk; in fact, some groups like those with high cholesterol or on certain medications showed a lower or unchanged risk.
• The findings imply that minor sleep disruptions caused by time changes could elevate heart attack risk, and identifying high-risk groups might help develop preventative strategies to reduce this risk.]