Your doctor can order a host of complex tests to gauge the health of your heart, but Prevention's resident cardiologist, Arthur Agatston, MD, shared three new methods of predicting heart disease that are surprisingly simple and effective. One can be done with your eyes closed-literally. Another can be ordered the next time you have a blood test, and the third involves taking the temperature of your finger. Here's a rundown of how each one works:
1. The Sleep Test
Answer this question: Do you feel drowsy during the day? If so, you may be harming your heart. Every extra hour of sleep middle-aged adults can add to their nightly average reduces their risk of coronary artery calcification by 33%, according to a study reported in the Journal of the American Medical Association. When you're even a little sleep deprived, your body releases stress hormones that constrict arteries and cause inflammation. If you routinely wake up feeling tired or need an afternoon nap, then you're
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