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应用经颅多普勒（ＴＣＤ）检查对一些缺血性脑血管病所致眩晕进行鉴别诊断。方法：对椎基底动脉短暂缺血性眩晕（Ａ组）、偏头痛（Ｂ组）、过度换气综合征（Ｃ组）和高血压病（Ｄ组）等病例，进行经颅多普勒常规检查（ＴＣＤ－Ｒ）、过度换气１ｍｉｎ（ＴＣＤ－ＨＶ）和自主屏气 １ｍｉｎ（ＴＣＤ－Ｂ）检查，测定椎基基底动脉的收缩期峰流速（Ｖｓ）和舒张期末峰流速（Ｖｄ）。结果：Ａ组、Ｂ组和Ｄ组的三项测试中Ｖｓ和Ｖｄ皆降低，以Ｄ组最为明显，Ａ组、Ｂ组降低的程度相似，而Ｃ组则无明显降低。Ａ组的Ｖｓ在ＴＣＤ－Ｂ测试中异常发生率高于Ｂ组及Ｃ组，明显低于Ｄ组；在ＴＣＤ－ＨＶ测试中低于Ｄ组和Ｃ组，高于Ｂ组，在ＴＣＤ－Ｒ测试中明显低于Ｄ组而与Ｂ组和Ｃ组无差异。Ａ组的Ｖｄ异常率，在ＴＣＤ－Ｒ测试中低于Ｄ组而与Ｂ组、Ｃ组无明显差异。结论：ＴＣＤ检查有助于对缺血性脑血管病所致眩晕的鉴别诊断。
Application of transcranial Doppler (TCD) examination of some ischemic cerebrovascular disease caused by the differential diagnosis of vertigo. Methods: The cases of transient ischemic vertigo (group A), migraine (group B), hyperventilation syndrome (group C) and hypertension (group D) were studied by transcranial Doppler The peak systolic velocity (Vs) and peak diastolic velocity (Vd) of vertebrobasilar artery were measured by TCD-R, TCD-HV and TCD-B for 1min. Results: Vs and Vd decreased in all three tests of group A, group B and group D, most notably in group D, but similar in group A and group B, but not in group C. The abnormal Vs in group A was significantly higher than that in group B and C in TCD-B test, lower than that in group D, lower than those in group D and C in TCD-HV test, The test was significantly lower than the D group and B group and C group no difference. The rate of Vd abnormality in group A was lower than that in group D in TCD-R test and no significant difference with group B and C. Conclusion: TCD examination can be helpful for the differential diagnosis of vertigo caused by ischemic cerebrovascular disease.