title: [TCD functional test for vertigo induced by ischemic cerebrovascular disorders].
abstract: OBJECTIVE
  To diagnose differentially the vetigo induced by some ischemic cerebrovascular disorder.
  
  
  METHODS
  Patients with vertebrobasilar artery transient ischemic vertigo (group A), migraine (group B), hyperventilation syndrome (group C), hypertension (group D) are measured by using TCD functional examination which included blood peak velocity of systolic (Vs) and diastolic (Vd) end-period of vertibrobasilar artery of routine TCD (TCD-R), one minute hyperventilation TCD (TCD-HV) and one minute voluntary apnea TCD (TCD-B) respectively.
  
  
  RESULTS
  It showed that the Vs, Vd are decreased under the three conditions in A, B and D groups. The most apparent decrease are obversed in D group. The values of the decrease are similar between group A and B. No changes are found in C group. The abnormal Vs incidences of TCD-B measurement in group A are higher than those in group B and C, but significant lower than those in group D; and in TCD-HV test lower than group D and C, higher than group B; in TCD-R test, lower than group D, and no difference with group B and C. The abnormal incidences of Vd in group A are lower than group D and higher than group B in TCD-B test. In TCD-HV test, the group A abnormol incidences are lower than group D but higher than group B and C. In TCD-R test, the abnormal incidences are lower than group D and no difference between group B and C.
  
  
  CONCLUSIONS
  The TCD measuremen is useful for differential diagnosis of vertigo induced by ischemic cerebrovascular disorders.
authors.affiliation: Department of Otorhinolaryngology, Union Hospital, Tongji Medical University, Wuhan 430022.
authors.forename: Q
authors.initials: Q
authors.lastname: Li
authors.forename: N
authors.initials: N
authors.lastname: Zhong
authors.forename: X
authors.initials: X
authors.lastname: Xue
mesh_terms: D002545:Brain Ischemia / Q000150:complications* / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000000981:diagnostic imaging; D008881:Migraine Disorders / Q000150:complications / Q000000981:diagnostic imaging; D013575:Syncope / Q000000981:diagnostic imaging; D017585:Ultrasonography, Doppler, Transcranial; D014717:Vertigo / Q000000981:diagnostic imaging / Q000209:etiology*