Elevated glucose associated with undetected heart damage

A new study led by researchers at the Johns Hopkins Bloomberg School of Public Health suggests that hyperglycemia (high blood sugar) injures the heart, even in patients without a history of heart disease or diabetes. Researchers found that elevated levels of glycated hemoglobin (HbA1c), a marker for chronic hyperglycemia and diabetes, were associated with minute levels of the protein troponin T (cTnT), a blood marker for heart damage. The high-sensitivity test they used detected levels of cTnT tenfold lower than those found in patients diagnosed with a heart attack. The findings, which are published in the latest issue of the Journal of the American College of Cardiology, suggest that hyperglycemia may be related to cardiac damage independent of atherosclerosis.

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