Swedish Myocardial Infarction Register

(Newser) - When the temperature drops, the number of heart attacks goes up, according to a massive 16-year study of some 280,000 patients in Sweden. "There is seasonal variation in the occurrence of heart attack, with incidence declining in summer and peaking in winter," says the lead author in...

(Newser) - Does turning clocks back in the autumn and forward in spring affect the risk of heart attack? New research suggests it may. Scientists found a 5% drop in heart attacks the day after clocks are changed in the fall, but discovered a 5% increase when clocks are moved ahead in...