PMID: 11318840Apr 25, 2001Paper

Prolonged QTc interval predicts mortality in patients with Type 1 diabetes mellitus

Diabetic Medicine : a Journal of the British Diabetic Association
P RossingH H Parving

Abstract

To evaluate prolonged QTc interval and QT dispersion as predictors of all-cause and cardiovascular mortality after adjustment for well-established risk factors in Type 1 diabetic patients. From a cohort of all adult Type 1 diabetic patients, duration of diabetes >or= 5 years, attending the clinic in 1984 and followed in an observational study for 10 years (n = 939), all subjects with resting baseline electrocardiograms were identified (n = 697, 360 males). The QT length was measured and corrected for heart rate (QTc). Maximal QTc length (QTc max) and QT dispersion were determined. At baseline, 431 had normoalbuminuria (< 30 mg/24 h), 138 had microalbuminuria (30-299 mg/24 h) and 128 had macroalbuminuria (>or= 300 mg/24 h) of whom 66 (15%), 35 (25%) and 61 (48%) died during follow-up, respectively (26 (6%), 14 (10%), 21 (16%) from cardiovascular disease). QTc max. was 442 (1.2) ms (mean (SEM)) for survivors and 457 (3.7) in patients who died (P < 0.001). In a Cox proportional hazards model including baseline values of putative risk factors, independent predictors of death were QTc max (P = 0.03), age (P < 0.001), presence of hypertension (P = 0.001), male sex (P < 0.001), log urinary albumin excretion (P < 0.001), smoking (P = 0...Continue Reading

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Citations

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