Willis 环变异的临床意义,迄今尚未清楚。罕有从生体上进行观察研究者。著者根据脑血管造影所见来研究 Willis 环的变异以及与脑血管损伤的相互关系。通过197例脑血管损伤病人与40—60岁之健康者39例之一侧或两侧之颈动脉造影,发现在脑血管损伤组大脑后动脉及对侧大脑 The clinical significance of Willis loop variation has not yet been clarified. Rare from the body to observe the researchers. The authors looked at changes in Willis rings and their relationship to cerebrovascular injury based on cerebral angiography findings. Through 197 cases of cerebrovascular injury patients and 40-60 years of healthy 39 cases of one or both sides of the carotid artery angiography and found that cerebrovascular injury group posterior cerebral artery and the contralateral brain