3Griffiths PD. Vascular supply and drainage of the brain. In: Standring S. Gray's Anatomy,40th ed. Churchill Livingston [ J ]. Elsever, 2008,247-256.
4Brott TG, Halperin J L,Abbara S,et al. Guideline on the Manage- ment of Patients With Extracranial Carotid and Vertebral Artery Disease [ J ]. JACC, 2011,57 : 19-94.
6Aear M,Degirmenci B,Yucel A,et al, An evaluation of internal carotid artery and cerebral blood flow volume using color duplex sonogaphy in patients with vertebral artery hypopasia IJ 1- Eur J Radiol,2005, 53:450-453.
7(;hen YY ,Chao Ak;,Hsu HY ,et al. Vertebral artery hypoplasia is associated with a decrease in net vertebral flow volume [Jl. Ultrasound Med Biol,2010,36:38-43.
