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Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't
Acute and delayed antithrombotic effects of alcohol in humans.
American Journal of Cardiology 2001 January 2
Alcohol intake, especially in the form of red wine, has been shown to inhibit platelet function. However, whether alcohol in spirits may inhibit platelet-dependent thrombosis in humans up to 6 hours after ingestion is unknown and was assessed in this study. Platelet thrombus that is formed on exposure of an aortic media (simulating deep arterial injury or plaque rupture) to flowing blood was assessed in an ex vivo Badimon's superfusion chamber at shear rates of 754 or 2,546 seconds(-1) (simulating flow in normal or stenosed arteries). Twelve healthy subjects were studied before and at 20 minutes and 6 hours after consumption of 2 ounces of 40% alcohol. Blood alcohol level was 1.1+/-0. 1, 8.2+/-0.7, and 1.3+/-0.2 mmol/L at baseline, 20 minutes and 6 hours, respectively, after alcohol consumption (analysis of variance [ANOVA] p = 0.0001). Compared with baseline, platelet thrombus formation at the low shear rate flow was significantly decreased by 57% and 61% at 20 minutes and 6 hours, respectively, after alcohol intake (ANOVA p = 0.0001). Platelet thrombus deposition at the high shear rate was similarly inhibited to 68% and 64% of baseline values at 20 minutes and 6 hours, respectively (ANOVA p = 0.003). Men and women showed equal benefit. Thus, moderate alcohol intake in humans significantly inhibited platelet thrombus deposition under low and high shear rates of arterial flow conditions. This antithrombotic effect of a single alcohol drink, persisting for 6 hours and even after blood alcohol level has returned to baseline, may be clinically relevant to the cardioprotective effects of alcohol in men and women.
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