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Diabetes Watch Blog: Diabetic Hearts Make Unhealthy Switch

Return to Diabetes Watch Blog Main Diabetes News Type-2 Diabetes  

Feb 13, 2006

Diabetic Hearts Make Unhealthy Switch

Diabetic Hearts Make Unhealthy Switch
The high-fat "diet" that diabetic heart muscle consumes helps make cardiovascular disease the most common killer of diabetic patients, according to a study done at Washington University School of Medicine in St. Louis. The study will appear in the February 7 issue of the Journal of the American College of Cardiology and is now available online.

Sixty-five percent of people with diabetes die from heart attack or stroke. When the researchers investigated fuel consumption in heart muscle, they found that heart muscle of type 1 diabetic patients relies heavily on fat and very little on sugar for its energy needs.

In contrast, heart muscle in non-diabetics doesn't have this strong preference for fat and can use either sugar (glucose) or fat for energy, depending on blood composition, hormone levels or how hard the heart is working.

"The diabetic heart's overdependence on fat could partly explain why diabetic patients suffer more pronounced manifestations of coronary artery disease," says senior author Robert J. Gropler, M.D., professor of radiology, medicine and biomedical engineering and director of the Cardiovascular Imaging Laboratory at the Mallinckrodt Institute of Radiology at the School of Medicine. "The heart needs to use much more oxygen to metabolize fats than glucose, making the diabetic heart more sensitive to drops in oxygen levels that occur with coronary artery blockage."

Compared to non-diabetics, diabetic patients often have larger infarctions and suffer more heart failure and sudden death when the heart experiences an ischemic (low-oxygen) event.

JoAnn      



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Medicineworld.org publishes a diabetes watch blog and this blog is run by JoAnn other bloggers. This diabetes watch blog brings you the latest in the field of diabetes. This includes personal stories, advances in diagnosis and treatment, and other observations about diabetes. Improving awareness about diabetes is an important mission of this group.

Janet      


Type-2 Diabetes
Type-2 diabetes is the most common form of diabetes, accounting for 90% of cases diabetes. This disease affects nearly 17 million Americans and is the seventh leading cause of death in the United States. Even though 17 million Americans have type-2 diabetes only half of these people are aware that they have diabetes. The death rate in patients with diabetes may be up to 11 times higher than in persons without the disease. The occurrence of diabetes in persons 45 to 64 years of age is 7 percent, but the proportion increases significantly in persons 65 years of age or older. Type-2 diabetes accounts for more than 90% of all diabetes worldwide.

Diabetes Watch Blog: Diabetic Hearts Make Unhealthy Switch

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