Results The inhibitory effects of three vasodilators on norepinephrine concentration-response curves were more powerful than that on potassium chloride concentration-response curves.

• 结果色满卡林、福斯考林、硝酸甘油对去甲肾上腺素量效曲线的抑制强度明显高于三药对氯化钾量效曲线的抑制。