NDLI: Extent of Lesions in Idiopathic Sudden Hearing Loss With Vertigo: Study Using Click and Galvanic Vestibular Evoked Myogenic Potentials

Content Provider	JAMA Network
Author	Iwasaki, Shinichi Takai, Yoshinari Ozeki, Hidenori Ito, Ken Karino, Shotaro Murofushi, Toshihisa
Copyright Year	2005
Abstract	Objective: To clarify the extent of the vestibular lesions in idiopathic sudden hearing loss with vertigo using vestibular evoked myogenic potentials ( VEMPs) in response to click (click- VEMP) and galvanic (galvanic- VEMP) stimulation, as well as caloric tests. Design: Retrospective study. Setting: University hospital. Patients: We enrolled 22 patients with idiopathic sudden hearing loss with vertigo in this study. All patients underwent audiometry and click- VEMP and caloric tests. Eight patients underwent a galvanic- VEMP test. Results: Among the 22 patients, 17 (77%) showed an absence of click- VEMPs on the affected side. In response to caloric testing, 10 patients (45%) showed a decreased response on the affected side. All 8 patients who underwent galvanic- VEMP testing showed normal responses. Most patients with decreased caloric responses (9 [90%] of 10 patients) showed an absence of click- VEMPs, whereas 9 (53%) of the 17 patients who showed abnormal click- VEMPs showed decreased caloric responses. Initial hearing level and hearing outcome significantly correlated with abnormalities on the vestibular test results. Conclusions: The lesion site of vestibular disorders in idiopathic sudden hearing loss with vertigo appeared to be within the labyrinth on the basis of galvanic- VEMP findings. Results of the click- VEMP and caloric tests suggested that the saccule could be involved more frequently than the semicircular canals. The combined use of click- VEMP and caloric tests is useful for evaluating vestibular functions in idiopathic sudden hearing loss with vertigo because the extent of vestibular abnormalities correlated well with hearing outcome.
Ending Page	862
Starting Page	857
Page Count	6
File Format	PDF HTM / HTML
ISSN	08864470
DOI	10.1001/archotol.131.10.857
Issue Number	10
Journal	Archives of Otolaryngology–Head & Neck Surgery
Volume Number	131
Language	English
Publisher	American Medical Association
Publisher Date	2005-10-01
Access Restriction	Open
Subject Keyword	sudden hearing loss vertigo vestibular evoked myogenic potentials audiometry caloric tests semicircular canal vestibular diseases inner ear laboratory test finding
Content Type	Text
Resource Type	Article
Subject	Otorhinolaryngology Surgery

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