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Risk of Heart Disease Reduced for Extremely Obese After Weight Loss Surgery

June 30, 2006 -- Weight lossWeight loss surgery may cut the risk of heart diseaseheart disease by nearly half among the extremely obese.

A new study shows that extremely obese people who had weight loss surgery had less than half the risk of heart disease following surgery and were also less likely to require heart surgery to unclog blocked arteries than those who did not have the surgery.

In medical terms, extreme obesityobesity is known as morbid obesity and is defined as having a body mass index (BMI, a ratio of weight in relation to height) of 40 or higher.

Morbid obesity is associated with a number of heath risks, including an increased risk of heart disease, type 2 diabetesdiabetes, high blood pressurehigh blood pressure, and others.

"No other treatment has been shown to have this much impact on preventing or reducing heart disease in patients with morbid obesity," says researcher Nicolas V. Christou, MD, PhD, of McGill University Health Center in Montreal, in a news release.

The results of the study were presented this week at the annual meeting of the American Society for Bariatric Surgery in San Francisco.

Weight Loss Surgery Helps Heart

In the study, researchers compared the risk of heart disease and related complications between 1986 and 2002 among a group of 1,035 morbidly obese patients who had weight loss surgery with more than 5,700 who did not have the surgery.

The most common form of weight loss surgery is called a gastric bypass, in which the size of the stomach is reduced and a section of the small intestine is bypassed in order to reduce the amount of food and calories a person is able to consume and digest to encourage rapid weight loss.

Overall, those who had weight loss surgery lost about 67% of their excess body weight after the surgery.

The results of the study showed that morbidly obese people who had weight loss surgery dramatically reduced their risk of heart disease and other heart-related complications compared with those who did not have the surgery.

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