基底动脉尖综合征患者的常见影像学改变:椎动脉异常

目的利用核磁共振成像(MRI)观察基底动脉尖综合征(TOBS)患者的椎动脉和基底动脉的影像学改变情况,探讨该综合征的发病机制。方法对我院1998年以来所有行MRI检查的基底动脉尖综合征患者进行回顾性分析,观察椎动脉和基底动脉的核磁共振血液流空情况,借此判断血管有无异常。结果31例患者发现椎动脉和基底动脉流空不良者25例(80.6%),其中单个椎动脉异常者17例(54.8%),椎动脉和基底动脉同时异常者6例(19.4%),基底动脉异常者2例(6.5%),未发现血流异常者6例(19.4%)。结论TOBS患者常存在椎动脉和基底动脉的血流异常,以单侧椎动脉异常最为多见,提示动脉-动脉栓塞是TOBS发病的主要病因。

Abnormal of the vertebral artery on MR: ever-present imaging change of top of the basilar syndrome

Objective:Observe the vertebral and basilar artery on MR imagining in patients suffering top of the basilar artery syndrome(TOBS). Discuss the mechanism of TOBS. Methods: Retrospectively study all patients underwent MRI examination from 1998 to 2005. Observe the flow void of vertebral and basilar artery,normal or abnormal flow void of the artery were noticed. Results:There were 31 patients fulfilling the demands. Among them,abnormal flow void of vertebral or basilar arteries was noticed in 25 cases(80.6%),unilateral vertebral artery involved in 17 cases(54.8%),both vertebral and basilar artery involved in 6 cases(19.4%),only basilar artery involved in 2 cases(6.5%),normal flow void was noticed in 6 cases(19.4%).Conclusions:Abnormal flow void of vertebral or basilar artery often exist in patients with TOBS. Unilaterel vertebral artery involved more often. This indicates that artery_artery embolism may play an important role in TOBS.