title: Relationship between endolymphatic hydrops and vestibular-evoked myogenic potential.
abstract: CONCLUSIONS
  Vestibular-evoked myogenic potential (VEMP) can be used to examine endolymphatic hydrops, especially in the vestibule.
  
  
  OBJECTIVE
  To investigate the relationship between the degree of endolymphatic hydrops revealed by magnetic resonance imaging (MRI) and VEMP.
  
  
  METHODS
  Gadolinium diluted with saline was injected intratympanically in 49 ears (40 patients). One day after the injection, the endolymphatic space in the vestibule and the cochlea was visualized by 3 Tesla MRI. A VEMP test was done, and VEMP was judged as absent when the VEMP was within the noise level.
  
  
  RESULTS
  VEMP was present in 21 ears and absent in 28 ears. Endolymphatic hydrops was significantly associated with the disappearance of VEMP. Endolymphatic hydrops in the vestibule had a stronger effect than endolymphatic hydrops in the cochlea. Five patients with extremely large vestibular hydrops showed no response of VEMP.
authors.affiliation: Department of Nutrition and Food Science, Nagoya Women's University, Nagoya, Japan.
authors.forename: Naomi
authors.initials: N
authors.lastname: Katayama
authors.forename: Masako
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Masaaki
authors.initials: M
authors.lastname: Teranishi
authors.forename: Shinji
authors.initials: S
authors.lastname: Naganawa
authors.forename: Seiichi
authors.initials: S
authors.lastname: Nakata
authors.forename: Michihiko
authors.initials: M
authors.lastname: Sone
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Nakashima
mesh_terms: D005071:Evoked Potentials; D005682:Gadolinium / Q000008:administration & dosage; D006801:Humans; D008279:Magnetic Resonance Imaging; D008575:Meniere Disease / Q000175:diagnosis*
chemical_list: D005682:Gadolinium