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Arteriosclerosis, Thrombosis, and Vascular Biology. 1993;13:98-104

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Arteriosclerosis and Thrombosis, Vol 13, 98-104, Copyright © 1993 by American Heart Association

ARTICLES

Inhibition of exercise-induced shortening of bleeding time by fish oil in familial hypercholesterolemia (type IIa)

JB Hansen, V Lyngmo, B Svensson and A Nordoy
Department of Medicine, University of Tromso, Norway.

Fourteen patients suffering from familial hypercholesterolemia (type IIa) participated in a double-blind, placebo-controlled trial that evaluated the effects of fish oil ethyl ester (K-85, 5.7 g/day) or a hydroxymethylglutaryl coenzyme A reductase inhibitor (lovastatin, 40 mg/day) alone or in combination on lipid metabolism and bleeding time at rest and after standardized exercise. Lovastatin treatment reduced total cholesterol (-27%), low density lipoprotein cholesterol (-37%), and triglycerides (-18%), whereas high density lipoprotein cholesterol increased significantly (14%). K-85 affected total (-4%), low density lipoprotein (-9%), and high density lipoprotein (+7%) cholesterol insignificantly, whereas the triglyceride level decreased by 24% (p < 0.001). The combined regimen caused an additive decrease in the triglyceride level (41%), which differed significantly (p < 0.01) from that gained by lovastatin alone. Under basal conditions the bleeding time was not influenced by the different interventions. Standardized exercise shortened the bleeding time by 19% (p < 0.001) and 16% (p < 0.001) before intervention and after lovastatin treatment, respectively. After K-85 alone or in combination with lovastatin, the exercise-induced shortening of the bleeding time was totally inhibited, which may reflect a favorable influence of fish oil on the platelet- vessel wall interaction in these high-risk patients.




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