Coordinators: R. Sivieri (Pinerolo) and M. Veglio (Ivrea).
Prevalence of QT Prolongation in a Type 1 Diabetic Population and Its Association with Autonomic Neuropathy
Article first published online: 30 JUL 2009
1993 Diabetes UK
Volume 10, Issue 10, pages 920–924, December 1993
How to Cite
Sivieri, R., Veglio, M., Chinaglia, A., Scaglione, P., Cavallo-Perin, P. and For the Neuropathy Study Group of the Italian Society for the Study of Diabetes, Piemonte affiliate (1993), Prevalence of QT Prolongation in a Type 1 Diabetic Population and Its Association with Autonomic Neuropathy. Diabetic Medicine, 10: 920–924. doi: 10.1111/j.1464-5491.1993.tb00007.x
- Issue published online: 30 JUL 2009
- Article first published online: 30 JUL 2009
- Accepted 9 June 1993
- Type 1 diabetes;
- QT interval;
- Autonomic neuropathy
The prevalence of QT prolongation in a large random sample of Type 1 diabetic patients in Piemonte, Italy and its association with autonomic neuropathy were assessed. Three hundred and seventy-nine Type 1 diabetic patients (age 15–59) with (94, DAN+) and without (280, DAN-) autonomic neuropathy and 118 non-diabetic control subjects participated in the study. QT interval was measured on an ECG recorded at rest and QTc calculated according to Bazett's formula. QTc was greater than 0.440 s in 7.6% (95% CI 2.9–12.3) of control subjects, 25.6% (21.0–30.0) of diabetic patients, 30.8% (21.5–40.1) of DAN+, 23.9% (18.9–28.9) of DAN-. QTc was greater than 0.460 s (mean + 2SD of QTc in control subjects) in 11.7% (8.5–14.9) of diabetic patients, 18.1% (10.3–25.9) of DAN+, 9.6% (6.2–13.0) of DAN-. QT was above the 95% upper limit for the control subjects in the plot of measured QT against RR interval in 21.4% (17.3–25.5) of diabetic patients, 26.6% (17.7–35.5) of DAN+, 19.3% (14.7–23.9) of DAN-. No correlation was found between QT interval and age or disease duration. The prevalence of QT prolongation was higher in diabetic patients than in control subjects and in DAN+ than in DAN-.