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    High Testosterone May Raise Heart Disease Risk

    Study Shows Link Between High Testosterone and Heart Disease in Older Men
    By
    WebMD Health News
    Reviewed by Laura J. Martin, MD

    June 22, 2010 -- The higher a man's level of natural testosterone, the higher his risk of heart problems, according to a new study that looked at testosterone and heart disease only in men 65 and older.

    ''Increasing levels of testosterone were associated with a higher risk of heart disease and death from heart disease," says Kristen T. Sueoka, MD, a resident physician in internal medicine at the University of California San Francisco, who presented the findings at ENDO 2010, the annual meeting of The Endocrine Society, in San Diego.

    Research on testosterone and heart disease has yielded conflicting findings, she tells WebMD, prompting her to do the study.

    Sueoka and her colleagues focused on 697 men, average age 72, who were seen at six different U.S. centers from 2000 to 2005 while participating in a study to evaluate fracture risk in older men.

    None was taking hormone supplements.

    During an average of nearly four years of follow-up, 100 men (14%) had a coronary heart disease event such as a heart attack.

    When Sueoka looked at the testosterone levels from the blood tests, she found that higher total testosterone was associated with an increased risk of coronary heart disease.

    The men were divided into four groups, from lowest testosterone levels to highest. "People in the two highest quartiles had a 2.2 times increased risk of heart disease compared to those in the lowest."

    Defining low vs. high is complicated, Sueoka says, as there is controversy about the measurements. She categorized the men as low vs. high using only the measurements of the 697 men, so the low and high categories are relative.

    Higher testosterone, she says, appears to be linked to a higher risk of heart disease once men pass age 65.

    Her study was supported by the National Institute on Aging, National Heart Lung and Blood Institute and National Institute of Arthritis and Musculoskeletal and Skin Diseases.

    Debate on Testosterone and Heart Health

    Research findings have gone back and forth about testosterone and heart health, Sueoka tells WebMD. "There are some cross-sectional studies [snapshot in time studies] that have shown an association between low testosterone and higher risk of heart disease death."

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