经颅多普勒对高血压病脑血流动力学评价

Transcranial Doppler Ultrasound for the Assessment of Cerebral Hemodynamicsin Patients with Hypertension

采用经颅多普勒（ＴＣＤ）超声检查技术观察一组共３０例高血压病人脑动脉血流频谱图。其中Ⅱ期高血压２１例，Ⅲ期高血压９例；与非高血压对照组比较，高血压病人脑动脉平均血流速度（Ｖｍ）显著降低（Ｐ＜０．００１），血流脉动指数（ＰＩ）明显增高（Ｐ＜０．００１），同时伴有血流频谱形态的显著异常；高血压病史愈长，脑血管并发症愈多，ＰＩ值愈高，Ｖｍ愈低。认为ＴＣＤ技术作为一种无创伤性检测手段，能较为客观地评价高血压病人脑动脉血流动力学变化，对预测与防止中风发生，具有重要的临床价值。

To assess the cerebral hemodynamicsof Patients with hypertension,We studied the cere-bral arterial flow spectra in 30 patients with hyper-tension and 30 nonhypertensive individuals withtranscranial Doppler ultrasound(TCD )technique.As compared with nonhypertensive control group,the result indicated that the cerebral arterial flowmean velocity(Vm)was significantly lower (P<0.001),the arterial flow pulse index (PI) was signifi-cantly higber(P<0. 001)and the spectra was sig-nificantly abnormal in the hypertensive group; thelonger the history of hypertension,the more thecerebral complications,the higher PI,the lowerVm.We considered that the TCD,as a noninvasiveinspectoral technique,might evaluate the cerebralhemodynamics of the patients with hypertension ob-jectively and it has important clinical value for theforecast and prevention of the stroke.