How Stress and Diet Cause Heart Attacks

Word of Tim Russert's death at 58 shocked many Americans today, and behind the grief came nagging questions about heart attacks, like the one that struck the newsman, and anxiety about how they kill. Russert's death came in a week when the government reported U.S. life expectancy had risen to 78 years as heart disease and other leading causes of death decline.

About 1.2 million Americans suffer from heart attacks annually, and about 40 percent die from them. Russert sadly fit the profile, in some ways, for those who typically suffer from heart disease — he was overweight and was under heavy stress at times due to his career. He also reportedly suffered from diabetes and people with that disease are at higher risk for heart disease. The typical heart attack victim is 65, but they can occur at any age in men and women. Heart disease is the leading cause of death in the United States, and the most common heart disease here is a heart attack, according to the Centers for Disease Control in Atlanta. One American dies every minute from a heart attack. Heart attacks occur when a clogged artery blocks blood flow to a part of the heart, starving it of oxygen and causing part of the muscle to die and beat irregularly. Arteries don't clog overnight. Rather, plaque accumulates in them over years as a result, in part, of a diet high in cholesterol. High cholesterol foods include all animal products, including meat and dairy.

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Robin Lloyd

Robin Lloyd was a senior editor at Space.com and Live Science from 2007 to 2009. She holds a B.A. degree in sociology from Smith College and a Ph.D. and M.A. degree in sociology from the University of California at Santa Barbara. She is currently a freelance science writer based in New York City and a contributing editor at Scientific American, as well as an adjunct professor at New York University's Science, Health and Environmental Reporting Program.