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  • Title: Abnormal flow-mediated vasodilation in normal-tension glaucoma using a noninvasive determination for peripheral endothelial dysfunction.
    Author: Su WW, Cheng ST, Hsu TS, Ho WJ.
    Journal: Invest Ophthalmol Vis Sci; 2006 Aug; 47(8):3390-4. PubMed ID: 16877407.
    Abstract:
    PURPOSE: To assess peripheral vascular endothelial function in patients with normal-tension glaucoma (NTG) by using a noninvasive method: endothelium-dependent flow-mediated vasodilation (FMD). METHODS: Forty patients with NTG and 40 healthy age- and sex-matched normal control subjects underwent measurement of FMD and endothelium-independent nitroglycerin-mediated vasodilation (NMD) via high-resolution, two-dimensional (2D) ultrasonographic imaging of the brachial artery. The patients also underwent blood sampling for biochemistry, lipid profile, and high-sensitivity C-reactive protein (hsCRP) analysis. RESULTS: The NTG group exhibited significant impairment of FMD compared with the control group (NTG: 2.64% +/- 2.22%, control: 5.96% +/- 2.50%, P < 0.001). Multivariate analysis demonstrated that the presence of NTG was the strongest independent predictor of FMD. The lipid profile and hsCRP did not differ significantly between the two groups. CONCLUSIONS: This study demonstrated impaired FMD in patients with NTG and the results provide evidence of a generalized peripheral vascular endothelial dysfunction in patients with NTG.
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