眩晕是神经系统的常见症状,由多种原因引起,其中相当一部分病例是由椎基动脉供血异常引起的,椎动脉造影对了解椎基底动脉系统的血管形态学改变有较高的价值,但因其有创伤性,操作复杂,不能动态观察,在临床上未能广泛应用。自1982年Aaslid首次报告使用低频脉冲探头测得颅内动脉的多普勒信号以来TCD检测具有无创伤性,可重复检测,甚至监 Vertigo is a common symptom of the nervous system, caused by a variety of reasons, a considerable number of cases caused by vertebrobasilar anomalies, vertebral artery angiography to understand vertebrobasilar vascular system morphology has a higher value, but due to Its traumatic, complex operation, can not be dynamic observation, not widely used in clinical practice. Since Aaslid first reported in 1982 the use of a low-frequency pulse probe to measure Doppler signals in an intracranial artery, TCD testing has been shown to be noninvasive, repeatable and even monitored