Yahoo! News - Cold Weather Snaps Are Bad for Your Heart
MUNICH (Reuters) - Cold weather snaps can trigger heart attacks, particularly in people suffering from high blood pressure, researchers said on Monday.

The increased rate of attacks seen during wintertime lows is probably due to the fact that cold temperatures increase blood pressure and put more strain on the heart.

A 2-year study of 700 people admitted to hospital in France found the occurrence of heart attacks in people with hypertension, or high blood pressure, was twice as high when the mean temperature was lower than minus 4 Celsius (24.8 Fahrenheit).

I knew it all along; winter is bad for you.