橄榄脑桥小脑萎缩患者椎-基底动脉及局部脑血流的改变

目的研究橄榄脑桥小脑萎缩(OPCA)患者椎-基底动脉及局部脑血流(rCBF)的改变。方法对10例OPCA患者行数字减影血管造影(DSA)和单光子发射计算机断层扫描(SPECT)检查,并与对照组(眩晕、短暂性脑缺血发作患者)进行比较。结果OPCA组DSA表现为椎动脉细小5例(50%)、一侧缺如4例(40%)、分支稀疏9例(90%)、动脉晚期脑染色淡10例(100%);SPECT显示小脑及脑干rCBF降低8例(80%);对照组分别为3例(15%)、4例(20%)、4例(20%)、3例(15%)、7例(35%);两组差异有统计学意义(均P<0.01)。结论OPCA患者椎动脉缺如、细小的比率高,椎-基底动脉供血区rCBF减低,提示椎-基底动脉异常可能是OPCA的发病原因。

Changes of vertebral-basal artery and regional cerebral blood flow in patients with olivopontocerebellar atrophy

Objective To investigate the changes of vertebral-basal artery and regional cerebral blood flow(rCBF) in patients with olivopontocerebellar atrophy(OPCA).Methods 10 patients with OPCA were examined by digital subtraction angiography(DSA) and single-photon-emission-computed tomography(SPECT),and compared with the control group(patients with vertigo or transient ischemic attack).Results In OPCA group,there were 5 cases with small vertebral artery(50%),4 cases with single vertebral artery(40%),9 cases with small and little vessels(90%),10 cases with poor stain in later arterial phase(100%) could be seen by DSA.The lower rCBF in cerebellum and brain stem were seen in 8 cases(80%)by SPECT.In control group,there were 3 cases(15%),4 cases(20%),4 cases(20%),3 cases(15%) and 7 cases(35%) respectively.There were significant differences between the two groups(all P<0.01).Conclusions Patients with OPCA have higher ratio of single and/or small vertebral artery and lower rCBF of vertebral-basal artery supplied territory.It is suggested that abnormal vertebral-basal artery may be pathogeny of OPCA.