超声对脑血管狭窄与血管反应性的评价

目的:探讨脑血管狭窄及血管反应性(VMR)在眩晕症状中的相关性.方法:选取行经颅多普勒超声检查且无其他神经体征的头晕或眩晕患者156例,正常对照组48例.于平静呼吸探查脑血管颅外段(ICA、VA)及颅内段(V-BA、MCA、ACA、PCA)的血流动力学指标;颈部血管内中膜(IMT)、狭窄程度及屏气(>15 s)颈内动脉平均速度(MFV),计算VMR.比较各组间脑血管狭窄、VMR,对VMR与年龄、血压、空腹血糖、IMT进行多元线性回归分析.结果:脑血管狭窄眩晕组明显高于头晕组(P<0.05);单纯椎-基底动脉系统血管狭窄率眩晕组高于头晕组(P<0.05);头晕组、眩晕组VMR明显低于对照组(P=0.001、P=0.003);眩晕组VMR与年龄、收缩压、空腹血糖和IMT厚度有明显相关性.结论:眩晕患者脑血管狭窄率高于头晕患者,以椎-基底动脉系统为主,头晕及眩晕患者VMR降低,VMR与年龄、收缩压、空腹血糖和IMT厚度呈负相关.

Untrasonic evaluation of cerebrovascular stenosis and vasomotor reactivity

Objective:To evaluate the relationship between dizziness and the stenosis of cerebrovascular,vascular motor reactivity(VMR).Methods:A total of 204 patients were divided into three groups according to the clinical symptoms,the extracranial segment of the cerebral arteries(ICA,VA) and intracranial arteries(ACA,MCA,PCA,V-BA) were observed when calm breathe and holding back breath(>15 s) with CDFI and TCD.The velocity and vasomotor reactivity were analysed.Results:The stenosis of cerebrovascular was higher in v...