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Am J Cardiol. 2004 Oct 1;94(7):932-5.

Effect of hyperuricemia upon endothelial function in patients at increased cardiovascular risk.

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Department of Cardiovascular Sciences, University of Cagliari, Cagliari, Italy. <>


The aim of the present study was to evaluate the effect of increased serum uric acid (UA) levels and their therapeutic reduction with allopurinol on endothelium-dependent dilation in subjects with a high cardiovascular (CV) risk but who were free from clinical CV disease. Patients with hyperuricemia had impaired flow-mediated dilation (FMD) compared with matched controls with normal UA levels and elevated CV risk. Three-month therapy with allopurinol improved FMD in hyperuricemic subjects, showing an intrinsic negative effect of elevated UA levels on the arterial wall; conversely, FMD remained unchanged in controls, thus suggesting that the reduction of UA to less than a certain value does not affect endothelial function.

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