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(Arteriosclerosis, Thrombosis, and Vascular Biology. 1995;15:2229-2233.)
© 1995 American Heart Association, Inc.

Articles

Increased Fibrinogen Levels in the Offspring of Hypertensive Men

Relation With Hyperinsulinemia and the Metabolic Syndrome

Jií Válek; Libue Válková; Zuzana Vlasáková; Vladimír Topinka

From the Institute for Clinical and Experimental Medicine (J.V., Z.V.) and the Postgraduate Medical School (L.V.), Abakus-Distribution (V.T.), Prague, Czech Republic.

Correspondence to Assistant Professor Jií Válek, MD, PhD, Department of Diabetes and Experimental Therapy, Institute for Clinical and Experimental Medicine, Vídeská 800, 14000 Prague 4, Czech Republic.

Abstract Epidemiological studies have revealed that elevated fibrinogen concentrations are associated with an increased risk of myocardial infarction, stroke, intermittent claudication, and cardiovascular mortality. The manner in which fibrinogen operates in atherogenesis has not yet been elucidated, but genetic control of fibrinogen levels is partially responsible. Fibrinogen frequently acts in concert with hyperlipidemia, diabetes, hypertension, physical inactivity, and age, variables that are influenced by insulin action. Because the offspring of hypertensive men tend to be hyperinsulinemic and insulin resistant from a young age, we hypothesized that their increased fibrinogen levels might reflect decreased insulin action and thus play a role in the metabolic syndrome. We chose 48 adult offspring (mean age, 38.4 years) of 30 fathers who had been treated for hypertension, and the former were matched by age, body mass index, sex, and smoking habits with 37 control subjects. Elevations in fibrinogen concentration (3.63±0.93 versus 2.87±0.54 g/L, P<.001) paralleled increases in blood glucose and insulin levels, estimates of insulin resistance, and blood pressure. In the offspring, in contrast to the control group, correlations between fibrinogen and metabolic-syndrome variables (ie, insulin, glucose, and waist and hip circumferences) were found. In stepwise multiple regression analyses, age and smoking habits were entered as variables in both study groups, but postload insulin and high-density lipoprotein cholesterol were entered as variables in the offspring group only. We propose that familial predisposition influences the relationship between insulin concentration and fibrinogen, an effect that may contribute to the clinical importance of the metabolic syndrome.

Key Words: fibrinogen • hypertension metabolism • insulin resistance • risk factors

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