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目的探讨颈内动脉系统短暂性脑缺血发作（ＴＩＡ）病人的脑血流动力学指标（ＣＶＤＩ）改变及其临床意义。方法６０例颈内动脉系统ＴＩＡ病人均在末次发作后２４ｈ内进行脑血流动力学测定。结果①病人组与对照组比较，平均血流量（Ｑｍｅａｎ）、血流速度、零压顺应性（ＣＯ）明显下降；脑血管阻力（Ｒ）、特性阻抗（ＺＣ）、脉搏波波速（ＷＶ）、动态阻力（ＤＲ）、临界压力（ＣＰ）均增高，具有统计学意义。②病灶侧与健侧比较，平均血流量、血流速度、零压顺应性明显下降；脑血管阻力、动态阻力增高，上述各项指标均有统计学意义。结论脑血流动力学障碍是引起颈内动脉系统短暂性脑缺血发作的机理之一
Objective To investigate the changes of cerebral hemodynamics (CVDI) in patients with internal carotid artery transient ischemic attack (TIA) and its clinical significance. Methods Sixty patients with internal carotid artery TIA patients underwent intracranial hemodynamics within 24 hours after the last episode. Results ① The mean blood flow (Qmean), blood flow velocity and zero pressure compliance (CO) were significantly decreased in patients and control groups. The vascular resistance (R), characteristic impedance (ZC), pulse wave velocity Dynamic resistance (DR), critical pressure (CP) were increased, with statistical significance. ② The lesion side and contralateral side, the average blood flow, blood flow velocity, zero pressure compliance decreased significantly; cerebral vascular resistance, dynamic resistance increased, the above indicators were statistically significant. Conclusions Cerebral hemodynamic disorders are one of the mechanisms leading to transient ischemic attack in the internal carotid artery