The examination of ultrasonography in abnormal development of vertebral artery

Objective To assess the exaqmination values of high-frequency color doppler ultrasonography for congenital abnomal development of vertebral artery.Methods A total of 77 cases with vertebrobasilar insufficiency were examined using high-frequency ultrasonography.The vascular morphological changes and hemodynimics of the vertebral artery were observed.Results In the cases with doubtful vertebrobasilar insufficiency,the rate of congenital abnomal development of vertebral artery is 31%,the rate of congenital stenosis of vertebral artery in one side is 27%,the entry position of vertebral artery into the foramen of transverse process of cervical vertebrae are abnormal in 3 cases,vertebral artery was C bends in 1case.Conclusion High-frequency ultrasonography can display Extracranial vertebral artery clearly,so congenital abnomal development of vertebral artery can be estimate by high-frequency ultrasonography.The color Doppler ultrasonography may become a general examination method for the vertigo.