短暂性脑缺血发作患者颈动脉超声多普勒研究

Ultrasonography of carotid artery in patients with transient ischemic attack

目的探讨短暂性脑缺血发作(TIA)患者的颈动脉的形态和血流动力学改变。方法用彩色多普勒超声(CDFI)观察42例TIA患者的颈动脉形态、斑块、平均血流速度(MV)、搏动指数(PI)和阻力指数(RI),并与性别、年龄相匹配的24例健康人对照。结果TIA组颈动脉I级狭窄者与对照组无差别,颈动脉Ⅱ、Ⅲ级狭窄者明显高于对照组,发生TIA的危险为对照组的3. 24倍;颈总动脉的MV、PI和RI明显高于对照组。TIA组和对照组斑块内无回声及弱回声区面积占斑块面积的百分比均值分别为(48. 6±12. 3)%及(22. 1±7. 6)%。结论CDFI可了解颈动脉内径、斑块性质、血流动力学改变,有助于TIA的诊断。

Objective To study the alterations of morphology and hemodynamics of carotid artery in patients with transient ischemic attack (TIA) by color Doppler flow imaging(CDFI). Methods CDFI was used for quantification of morphology, identification of plaques and determination of mean velocity, pulse and resistance index. 24 healthy volunteers are detected the as control group. Results There was no significant difference between the TIA group and control group,when the stenosis extent of carotid artery was in the 1st degree. But when that was in the 2nd or 3rd degree, there was significant difference between the two groups. The risk for TIA was as 3.24 times of that of control group. The percentage of weak echo inside the plaque in TIA and control group were (48.6±12.3)% and (22.1±7.6)% respectively. Conclusions CDFI can evaluate the internal-direction, property of plaque and hemodynamics of carotid artery, which lead to the diagnosis of TIA.