Slight temperature dip might boost heart attack risk

August 11, 2010 2:20:59 PM PDT
Heat-related heart attacks are a summertime threat. But now comes word that cold weather can also pose a threat.

What's interesting about this latest study is that it suggests even a small drop in temperatures can translate to a heightened risk for heart attack in the following month.

The study in the British Medical Journal found a drop of just 1.8 degrees on a single day gives rise to a cumulative 2 percent rise in the number of heart attacks the following weeks.

Scientists say the effects can linger for up to 28 days.

Prior research has suggested that as temperatures go down, blood pressure goes up, making blood thicker and working the heart harder.


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