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Heart Hazards Hurt Nerves in Diabetes Patients

New Risk Factors Found That Raise Risk of Nerve Damage
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Jan. 26, 2005 -- People with diabetes may want to pay special attention to their hearts. Certain heart disease risk factors may also raise the risk of nerve damage from diabetes.

The damage -- called diabetic neuropathy -- affects the nerves of the body. It can lead to numbness, pain, and weakness in the hands, arms, feet, and legs. The condition is especially common among people who have had diabetes for a long time.

Neuropathy can make it harder to feel pain. That's dangerous, since pain is the body's injury alarm.

Some types of neuropathy can also harm the body's internal organs and systems. In those cases, problems can arise with the regulation of body temperature, digestion, urinary and sexual function, and the heart and blood vessels.

People who have had diabetes for long periods of time are at risk for nerve damage. However until now, poor blood sugar control was the only proven risk factor. But the suspect list just got longer, and the additions also endanger the heart.Diabetic and On Insulin? Take a Quality of Life Quiz.

New Risk Factors Found

Smoking, high levels of blood fats (such as cholesterol and triglycerides), high blood pressure, and greater BMI are among the newly identified and potentially modifiable risk factors for diabetic neuropathy.

The findings appear in the Jan. 27 issue of The New England Journal of Medicine. They're based on more than 1,100 people with type 1 diabetes in Europe.

Participants were studied twice during a seven-year period. They provided blood samples to determine glucose and cholesterol control, and urine samples to check for kidney damage. Researchers also tested the participants for nerve damage.

None had neuropathy at the beginning of the study. But within seven years, about 23% had developed the condition. That's fairly typical, say the researchers, who included Solomon Tesfaye, MD, of the Diabetes Research Unit at England's Royal Hallamshire Hospital.

People who developed neuropathy tended to have several things in common, including:

  • Higher total and LDL "bad" cholesterol
  • Higher BMI
  • Higher levels of triglycerides (a type of blood fat)
  • History of smoking
  • High blood pressure

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