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ORIGINAL ARTICLE
Year : 2019  |  Volume : 3  |  Issue : 3  |  Page : 612-617

Cervical vestibular evoked myogenic potential and video head impulse test findings in benign paroxysmal positional vertigo


Audiovestibular Unit, ENT Department, Faculty of Medicine, Al-Zaharaa University Hospital, Al-Azhar University, Cairo, Egypt

Correspondence Address:
Iman Eladawy
MD of Audio Vestibular Medicine, Lecturer of Audio Vestibular Medicine, Al-Azhar Faculty of Medicine for Girls 6 Elkhabeer Street Elzaytoon Cairo
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/sjamf.sjamf_67_19

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Background Benign paroxysmal positional vertigo (BPPV) is the most common cause of vertigo. Approximately 20% of all dizziness is due to BPPV. Objective To assess the peripheral vestibular function in a group of patients with BPPV versus group of normal population by using the cervical vestibular evoked myogenic potential (cVEMP) and video head impulse test (vHIT). Materials and methods This is a comparative cross-sectional study. A total of 60 individuals [20 apparently healthy controls (40 ears) and 40 patients with BPPV, who initially were diagnosed by Dix–Hallpike test/supine roll test], were included in the study. All participants gave their written consent before participation in the study. The control as well as the study group was subjected to basic audiological evaluation and vestibular evaluation. Results Regarding the vHIT, there was a statistically significant difference between control and study groups regarding the left vertical canal gain and the asymmetry (P<0.005). There was a highly statistical significant difference in cVEMP latencies, amplitude, and asymmetry between patients with BPPV and controls (P<0.001). There was a significant difference in latencies as well as amplitude of both P13 and N23 between the affected ear and the nonaffected ear in patients with unilateral primary BPPV. Conclusion Significant abnormal cVEMP in BPPV may indicate saccular involvement in the BPPV pathophysiology, which needs more research to prove or disprove it. Abnormal vHIT gain and asymmetry of the left vertical canal only needs more research in a large sample size.


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