Clinical utility of cervical vestibular-evoked myogenic potentials in predicting residual dizziness after benign paroxysmal positional vertigo

ObjectivesIn the present study, the value of cervical vestibular-evoked myogenic potential (cVEMP) as a predictive factor for residual dizziness after recovery of benign paroxysmal positional vertigo (BPPV) was evaluated.MethodsThe present study included 65 patients who had BPPV and underwent cVEMP testing. Patients were divided into two groups depending on the presence or absence of residual dizziness after recovery of BPPV. Univariate and multivariate analyses were performed to determine the factors associated with residual dizziness using age, gender, affected semicircular canal, affected side, BPPV duration, and cVEMP parameters.ResultsIn univariate analysis, cVEMP-modified interaural amplitude difference (IAD) ratio and p13 latency showed a relatively significant association (p < 0.20) with residual dizziness. Based on multivariate analysis, increased cVEMP-modified interaural amplitude difference (IAD) ratio at the affected side (≥25%; p = 0.018, OR 6.623) remained as an associated factor.ConclusionsIncreased cVEMP-modified IAD ratio at the affected side is associated with residual dizziness. BPPV patients with increased cVEMP-modified IAD ratio at the affected side are more likely to have residual dizziness after recovery of BPPV.SignificancecVEMP testing could be used for the prediction of residual dizziness. An increased cVEMP-modified IAD ratio at the affected side may be used as a predictor of residual dizziness.