The findings of quite a number of studies suggest that the incidence of heart attacks and related deaths are higher during winter. Reports say that during the chilly winter days the mortality rate owing to heart attacks may be as much as 50 per cent higher than other times of the year. Dr. Nilesh Gautam Senior Interventional Cardiologist Asian Heart Institute says Multiple factors can increase the incidences of heart attacks and other heart problems increase during winter. Owing to the cold the heart has to pump more beats per minute in order to circulate warm blood throughout the body.