应用彩色多普勒对四组之间的肱动脉进行检测，观察静息状态下、反应性充血后及含服硝酸甘油后的内径变化。
The diameter of the brachial artery was measured by color Doppler ultrasound at rest, after reaction hyperemia and after sublingual nitroglycerin administration respectively.
目的评价内皮衍生超极化因子（EDHF）在血流介导性冠状动脉反应性充血扩张中的作用。
Objective To evaluate the role of endothelium-derived hyperpolarizing factor (EDHF) in flow-dependent coronary vasodilation induced by reactive hyperemia (RH).
采用高分辨率超声测反应性充血肱动脉内径变化率和含硝酸甘油后肱动脉内径变化率。
The changing rate of the inner diameter of brachial artery after reactive hyperemia and that after held nitroglycerin in mouth were detected with high resolution ultrasound.
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