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- W1977605936 abstract "Impaired endothelium-dependent vasodilation has been reported to play an important role in the pathogenesis of cardiovascular diseases such as coronary artery disease (CAD) and congestive heart failure (CHF). However, the precise mechanism of endothelial dysfunction has not been elucidated in these conditions. To evaluate the role of oxidative stress in endothelial dysfunction, the effect of antioxidant ascorbic acid on brachial flow-mediated, endothelium-dependent vasodilation during reactive hyperemia and nitroglycerin-induced endothelium-independent vasodilation was examined with high resolution ultrasound in 12 patients with CHF caused by idiopathic dilated cardiomyopathy without established coronary atherosclerosis and in 10 patients with CAD. Flow-mediated vasodilation in CHF (4.4+/-0.5%) and CAD (4.0 - 0.8%) was significantly (p <0.05) attenuated compared with that in 10 control subjects (9.6+/-0.9%). However, nitroglycerin-induced vasodilation was similar in 3 groups (13.7+/-1.3% in control, 13.9+/-1.1% in CHF, 12.7+/-1.4% in CAD). Ascorbic acid could significantly improve flow-mediated vasodilation only in patients with CAD (9.1+/-0.9%) but not with CHF (5.6+/-0.6%), and had no influence on nitroglycerin-induced vasodilation (13.6+/-1.1% in CHF, 14.0+/-1.3% in CAD). These results suggest that, in brachial circulation, augmented oxidative stress mainly leads to endothelial dysfunction in CAD but not in CHF caused by idiopathic dilated cardiomyopathy." @default.
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- W1977605936 date "1998-09-01" @default.
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- W1977605936 title "Comparison of effects of ascorbic acid on endothelium-dependent vasodilation in patients with chronic congestive heart failure secondary to idiopathic dilated cardiomyopathy versus patients with effort angina pectoris secondary to coronary artery disease" @default.
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- W1977605936 doi "https://doi.org/10.1016/s0002-9149(98)00449-4" @default.
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