正常人脑灌注压降低时 ,脑血管舒缩储备容量能保证充足的脑血流供应。然而 ,有严重颈动脉病变的病人脑血管舒缩反应性可能较差 ,导致低血流脑梗死。本研究对脑血管不同的血管收缩剂和血管舒张剂反应性的可重复性进行了评价。受试者为 4 5名健康志愿者 ,男 2 1名 ,女 2 4名 ,平 Normal cerebral perfusion pressure decreases, the cerebral vasomotor reserve capacity to ensure adequate supply of cerebral blood flow. However, patients with severe carotid artery disease may have poor vasoconstrictive responses to vasomotor, resulting in hypovascular infarction. This study evaluated the reproducibility of the responsiveness of different vasoconstrictors and vasodilators in cerebrovascular disease. The subjects were 45 healthy volunteers, 21 males and 24 females