Vestibular evoked myogenic potential in unilateral vestibular hypofunction.

Autor: Serra AP; Department of Otolaryngology and Head Neck Surgery, Federal University of São Paulo, Brazil. anap_serra@yahoo.com.br, Dorigueto RS, de Almeida RR, Ganança FF
Jazyk: angličtina
Zdroj: Acta oto-laryngologica [Acta Otolaryngol] 2012 Jul; Vol. 132 (7), pp. 732-8. Date of Electronic Publication: 2012 Mar 11.
DOI: 10.3109/00016489.2012.659283
Abstrakt: Conclusion: The patients with unilateral chronic vestibular hypofunction detected by caloric test demonstrated at least some sort of altered vestibular evoked myogenic potential (VEMP) in 63.63% of the cases. The VEMP altered side was the same as the unilateral vestibular hypofunction side in 54.54% of the cases and was the opposite side in 24.24%. The VEMP test improved functional vestibular assessment in patients with unilateral caloric hypofunction.
Objectives: To analyze VEMP in patients with chronic dizziness and unilateral vestibular hypofunction and verify findings according to the side and structures involved.
Methods: This was an observational study. In all, 66 subjects were evaluated by VEMP (tone bursts/1000 Hz/100 dBnHL/bandpass filtered 10-1500 Hz/4.3 Hz rate), 33 with unilateral vestibular hypofunction, detected by caloric test and clinical data, and 33 control subjects, matched by gender and age. Amplitude of the p13-n23, asymmetry index of the amplitude, p13 and n23 latencies, p13 and n23 interaural difference and threshold were analyzed. Simple descriptive analysis was carried out using the t test, Shapiro-Wilks test, and Mann-Whitney test, p < 0.05.
Results: VEMP was altered in patients with unilateral vestibular hypofunction in 63.63% of cases. Thirteen of them were ipsilateral to the vestibular hypofunction and three were contralateral to the vestibular hypofunction. In five cases, VEMP were bilaterally altered.
Databáze: MEDLINE
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