TRANSCRANIAL DOPPLER (TCD) AND BRAINSTEM AUDITORY EVOKED POTENTIALS (BAEP) STUDY IN 42 PATIENTS WITH VERTEBROBASILAR INSUFFICIENCY (VBI)

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FARHOUDI M.; LRAMLOO H.; FARAAHANI M.

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Journal: Current Journal of Neurology Year:2003 | Volume:3 | Issue:7 Page(s): 37-43

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Title

TRANSCRANIAL DOPPLER (TCD) AND BRAINSTEM AUDITORY EVOKED POTENTIALS (BAEP) STUDY IN 42 PATIENTS WITH VERTEBROBASILAR INSUFFICIENCY (VBI)

Author(s)

FARHOUDI M. | LRAMLOO H. | FARAAHANI M. | Issue Writer Certificate

Keywords

VBIQ4

BAEPQ4

TCDQ4

POSTERIOR CIRCULATION STROKEQ4

Abstract

Stroke ranks in the top four causes of death in most countries so especially in VBI cases urgent management will be necessary. Recently the evaluation of stroke on the basis of knowledge of the physiology of an ischemic event has changed dramatically. New noninvasive techniques such as ultrasound, MRA and evoked potentials are useful in this way. TCD with reported 70-80% sensitivity and 90-97% specificity has been applied to patients with VBI from 1980 and clinical utility of BAEPs stems from the close relationship between the EP waveforms and specific anatomic structures, in addition BAEPs are very resistant to alteration by anything other than structural pathology in related structures such as drug effects. Due to multiple reports this test can show pathologic findings in cases of vertebrobasilar TIA when clinical examination is normal. The aim of our study is to evaluate TCD and BAEP results of 42 patients with VBI to discuss diagnostic roles of these noninvasive tests in VBI. We studied 42 patients, 31 men and 11 women, who had clinical diagnostic criteria of VBI during May 2001 - March 2002. Average age was 65.9 years. In all patients other patologies usings a neuroimaging method were ruled out or ischemic lesions in posterior circulation distribution were detected. TCD and BAEP (using monaural 10/s click rate stimulation) studies were performed for all patients during 1 to 8 days after stroke. We used Pittsburgh criteria for TCD results evaluating and also interpeak latencies I-III (>2.2 ms), III-V (>1.9ms) in BAEP results interpretation. By clinical evaluation 11 patients had signs of brainstem involvement. Clinically, side of involvement was left in 19 cases, right in 19 cases (in 3 cases side of lesion was not detected). There was TCD abnormality in 10 cases. It showed basilar artery stenosis in 5 cases and vertebral or PCA stenosis in other cases. A relative correlation between side of lesion in clinical evaluating and TCD was seen. Only in 1 patient who had clinical signs of brainstem involvement TCD abnormality was seen. There was BAEP abnormality in 24 patients. A lack of correlation between clinical side of lesion and side of TCD abnormality was found but there was considerable correlation between clinically evaluated brainstem involvement and BAEP abnormality although analysis of TCD and VAEP abnormality did not reveal any correlation between there results. We found meaningful differences in interpeak latencies I-III and III- V between our patients and normal population. This differences also were seen in mean velocities of posterior circulation arteries between patients and normal population. Both BAEP and TCD are useful and complementary diagnostic techniques in evaluating of VBI patients especially BAEP that can detect brainstem lesions.

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APA: Copy

FARHOUDI, M., LRAMLOO, H., & FARAAHANI, M.. (2003). TRANSCRANIAL DOPPLER (TCD) AND BRAINSTEM AUDITORY EVOKED POTENTIALS (BAEP) STUDY IN 42 PATIENTS WITH VERTEBROBASILAR INSUFFICIENCY (VBI). CURRENT JOURNAL OF NEUROLOGY (IRANIAN JOURNAL OF NEUROLOGY), 3(7), 37-43. SID. https://sid.ir/paper/102755/en

Vancouver: Copy

FARHOUDI M., LRAMLOO H., FARAAHANI M.. TRANSCRANIAL DOPPLER (TCD) AND BRAINSTEM AUDITORY EVOKED POTENTIALS (BAEP) STUDY IN 42 PATIENTS WITH VERTEBROBASILAR INSUFFICIENCY (VBI). CURRENT JOURNAL OF NEUROLOGY (IRANIAN JOURNAL OF NEUROLOGY)[Internet]. 2003;3(7):37-43. Available from: https://sid.ir/paper/102755/en

IEEE: Copy

M. FARHOUDI, H. LRAMLOO, and M. FARAAHANI, “TRANSCRANIAL DOPPLER (TCD) AND BRAINSTEM AUDITORY EVOKED POTENTIALS (BAEP) STUDY IN 42 PATIENTS WITH VERTEBROBASILAR INSUFFICIENCY (VBI),” CURRENT JOURNAL OF NEUROLOGY (IRANIAN JOURNAL OF NEUROLOGY), vol. 3, no. 7, pp. 37–43, 2003, [Online]. Available: https://sid.ir/paper/102755/en

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