椎基底动脉显著扩张、延长、扭曲或成角被称为椎基底动脉扩张延长症(vertebrobasilar dolichoectasia,VBD),是目前正处于研究和探索阶段的一种脑血管变异性疾病。当椎基底动脉扩张、迂曲不明显,脑组织受压及血流动力学改变不显著时,可以没有临床症状和体征。一旦椎基底动脉过度 Vertebrobasilar artery is a kind of cerebrovascular variability disease which is in the process of research and exploration. It is called vertebrobasilar dolichoectasia (VBD) which is dilated, extended, twisted or angulated. When the vertebrobasilar artery dilated, tortuous obvious, brain tissue pressure and hemodynamic changes were not significant, there may be no clinical symptoms and signs. Vertebrobasilar artery once over