Cold Weather May Increase Stroke Risk for Some.

The onset of cold weather may actually pose health risks for some individuals with a heart condition. A new study found colder weather can increase the risk of stroke for people with atrial fibrillation by as much as 20% when compared with their risk during the warmer months. Atrial fibrillation is a common condition in which the heart beats irregularly that affects about 9% of elderly individuals in the United States.
European Society of Cardiology, August 2015