Abstract
Diabetic patients have an excess risk of dying from cardiovascular diseases. Recently, several studies have reported a high prevalence of QT prolongation and increased QT dispersion (QTd) in patients with diabetes. These abnormalities have been shown to be associated with sudden death and poor survival in both type 1 (1) and type 2 (2) diabetes. QTd, i.e., the difference between the maximum and minimum QT intervals on the 12-lead electrocardiogram (ECG) (QTd = QT max − QT min), is claimed to reflect the degree of inhomogeneity of myocardial repolarization. The role of hyperglycemia in causing QT abnormalities in people with diabetes is not clear. …
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