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  • Title: Treatment of hyperlipidaemia retards progression of symptomatic femoral atherosclerosis. A randomised controlled trial.
    Author: Duffield RG, Lewis B, Miller NE, Jamieson CW, Brunt JN, Colchester AC.
    Journal: Lancet; 1983 Sep 17; 2(8351):639-42. PubMed ID: 6136793.
    Abstract:
    The effect of plasma lipid reduction on the progression of femoral atherosclerosis was studied in hyperlipidaemic patients with stable intermittent claudication. 24 patients were randomly assigned to treatment and usual-care groups, the former receiving dietary advice and cholestyramine, nicotinic acid, or clofibrate depending on their lipoprotein phenotype. Biplanar arteriography was performed when the study began and after a mean period of 19 months. Angiograms were assessed visually, with blinding, and by computerised image analysis. Therapy reduced mean plasma total cholesterol by 25%, mean low density lipoprotein (LDL) cholesterol by 28%, and mean plasma triglycerides by 45%. Significantly fewer arterial segments showed detectable progression of atherosclerosis in the treatment group. The mean increase in plaque area (mm2/segment/year) in the treatment group was only one third of that in the usual-care group. The mean increase in edge irregularity index (a measure of the severity of disease) in the treatment group was only 40% of that in the usual care group. Twice as many arterial segments showed improvement in the treatment group. In both groups changes in edge irregularity index were directly related to plasma LDL cholesterol concentration. This study, the first randomised controlled trial of its type, provides evidence that effective treatment of hyperlipidaemia favourably influences the natural history of symptomatic peripheral atherosclerosis.
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