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  • Title: The impact of diabetes or elevated fasting blood glucose on cardiovascular prognosis in patients with stable angina pectoris.
    Author: Held C, Björkander I, Forslund L, Rehnqvist N, Hjemdahl P.
    Journal: Diabet Med; 2005 Oct; 22(10):1326-33. PubMed ID: 16176191.
    Abstract:
    AIMS: To examine the influences of diabetes and elevated fasting blood glucose on cardiovascular prognosis in patients with stable angina pectoris. METHODS: In a prospective study of 809 patients with stable angina pectoris randomized to receive metoprolol or verapamil, a subgroup of 69 diabetic patients was compared with non-diabetic patients with respect to the risk of cardiovascular (CV) death, non-fatal myocardial infarction (MI) and revascularization. We also analysed a subgroup of 67 patients with fasting blood glucose > or = 6.1 mmol/l, defined according to the most recent revised guidelines for the diagnosis of diabetes mellitus. Fasting blood glucose was measured in venous whole blood at baseline. RESULTS: The diabetic patients had a greater risk-factor burden, with a higher prevalence of hypertension, more likely to be male, a tendency towards a higher prevalence of previous MI, and higher triglyceride and lower high-density lipoprotein (HDL)-cholesterol levels. In multivariate analyses, diabetes was an independent risk factor for CV events with a relative risk of 2.64 (CI 1.39-5.00; P < 0.001) for CV death/MI, and 1.79 (CI 1.02-3.15; P < 0.01) for revascularization. Blood glucose > or = 6.1 mmol/l without a diagnosis of diabetes mellitus was found in 67 patients, and predicted CV death/MI [relative risk 2.76 (CI 1.97-3.84)] in both univariate and multivariate analyses. The prognosis of diabetic or hyperglycaemic patients did not differ significantly with metoprolol compared with verapamil treatment. CONCLUSIONS: Diabetes mellitus is an independent risk factor for CV death/MI and for revascularization in patients with stable angina pectoris. Elevated fasting blood glucose was seen in 9% of patients without known diabetes and was an equally strong and independent risk factor for CV death/MI as diagnosed and treated diabetes.
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