Etiological diagnosis of vertigo in elderly patients with transcranial cerebral doppler and brainstem auditory evoked potential

Zhang Shuping; Sha Jingying; Liu Shuiping

doi:10.3760/cma.j.issn.1673-4777.2014.10.019

Abstract：Objective To inverstigate the etiological diagnosis value of transcranial cerebral doppler (TCD) and brainstem auditory evoked potential(BAEP) in the elderly vertigo suffers.Methods Totally 50 cases of elderly patients with clinical diagnosis of vertigo as vertigo group were enrolled ; there were 48 cases elderly patients without history of vertigo,neurological signs including headache,peripheral neuropathy and sleep disorders.The extracranial arteries including both sides of common carotid artery,internal carotid artery,external carotid artery and subclavian artery(SUBA) were detected by TCD; the date of Vm,Vs,Vd,pulse index,resistance index were recorded.The data of BAEP including the altitude and peak latency of wave Ⅰ,Ⅲ,Ⅴ and the interpeak latency of wave Ⅰ-Ⅲ,Ⅲ-Ⅴ,Ⅰ-Ⅴ was recorded.Results The abnormal rate of TCD and BAEP was 80.0％(40/50) and 84.0％ (42/50) in the vertigo group ; the abnormal rate of TCD and BAEP was 25.0％ (12/48) and 37.5％ (18/48) in the control group.There were 21 patients with one vertebral artery(VA) stenosis,6 patients with basilar artery(BA) stenosis,4 patients with both sides VA stenosis,2 patients with 1 VA and BA stenosis,1 patient with anterior circulation artery stenosis and BA compensation.There were 7 patients with 1 VA stenosis,2 patients with BA stenosis,2 patients with 1 VA and BA stenosis,1 patient with 1 vertebral artery hypoplasia in the control group.The abnormalty of BAEP mainly showed the prolonging peak latency of wave V and the prolonging of interpeak latency of wave Ⅲ-Ⅴ.There were 25 patients with brain stem type,8 patients with 1 nner-ear type,9 patients with mixed type in the vertigo group.There were 2 patients with nrain stem type,10 patients with inner-ear type and 3 patients with mixed type.The difference between two groups was statistical significant (P ＜0.05).Conclusion The joint inspection of TCD and BAEP helps the etiological diagnosis of elderly vertigo suffers including posterior circulation ischemia.