"Because he wasn't raised where health was an issue in the household. There was nobody talkin' about health, probably nobody talking about not smoking or drinking or unhealthy practices, what it could lead to. There was nobody talkin' about that." National Center for Chronic Disease Prevention and Health Promotion hide caption

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Aspirin can lower the risk of heart attacks, but there's concern that it's being overused. Jim DeLillo/iStockphoto hide caption

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Researchers say poor sleep quality, too much sleep and too little sleep all play a role in heart health. iStockphoto hide caption

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For all the good aspirin can do in preventing second heart attacks and strokes, taking it daily can boost some risks, too — of ulcers, for example, and of bleeding in the brain or gut. iStockphoto hide caption

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For someone 2.5 inches shorter than average, the risk of coronary artery disease increases by about 13.5 percent, scientists found. PW Illustration/Ikon Images/Corbis hide caption

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Andreas Fhager, a biomedical engineer at the Chalmers University of Technology in Sweden, adjusts the Strokefinder device on a test subject's head. Gunilla Brocker hide caption

toggle caption Gunilla Brocker