title: Involvement of vestibular organs in idiopathic sudden hearing loss with vertigo: an analysis using oVEMP and cVEMP testing.
abstract: OBJECTIVE
  To investigate the extent of vestibular lesions in idiopathic sudden hearing loss (ISHL) with vertigo.
  
  
  METHODS
  We reviewed the clinical records of 25 consecutive new patients with ISHL with vertigo. We classified patients based on their pattern of vestibular dysfunction. All patients showed cochlear damage and were labeled C (cochlear) type. If a patient showed abnormal cervical vestibular evoked myogenic potential (cVEMP), ocular VEMP (oVEMP) or caloric responses, an S (saccule), U (utricule) or L (lateral semicircular canal) respectively was added to their label.
  
  
  RESULTS
  All patients underwent cVEMPs and caloric tests. Sixteen (64%) and 13 (52%) showed abnormal cVEMPs and caloric responses, respectively, on the affected side. Among the 23 patients who underwent oVEMPs, 10 (43%) showed abnormal oVEMPs on the affected side. Of these 23 patients, 6 (26%) were classified as C type, 4 (17%) as CS type, 1 (4%) as CL type, 1 (4%) as CSU type, 2 (9%) as CSL type, 1 (4%) as CUL type, 8 (35%) as CSUL type.
  
  
  CONCLUSIONS
  The vestibular end organs close to the cochlea tended to be preferentially affected.
  
  
  CONCLUSIONS
  It is likely that vestibular dysfunction extends from organs close to the cochlea to those further from the cochlea.
authors.affiliation: Department of Otolaryngology, Faculty of Medicine, The University of Tokyo, Japan. Electronic address: cfujimoto-tky@umin.ac.jp.
authors.forename: Chisato
authors.initials: C
authors.lastname: Fujimoto
authors.affiliation: Department of Otolaryngology, Faculty of Medicine, The University of Tokyo, Japan.
authors.forename: Naoya
authors.initials: N
authors.lastname: Egami
authors.affiliation: Department of Otolaryngology, Faculty of Medicine, The University of Tokyo, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Kinoshita
authors.affiliation: Department of Otolaryngology, Faculty of Medicine, The University of Tokyo, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Sugasawa
authors.affiliation: Department of Otolaryngology, Faculty of Medicine, The University of Tokyo, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Yamasoba
authors.affiliation: Department of Otolaryngology, Faculty of Medicine, The University of Tokyo, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Iwasaki
mesh_terms: D000328:Adult; D000368:Aged; D002150:Caloric Tests; D005260:Female; D003639:Hearing Loss, Sudden / Q000150:complications / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012444:Saccule and Utricle / Q000503:physiopathology*; D012665:Semicircular Canals / Q000503:physiopathology*; D014717:Vertigo / Q000150:complications / Q000503:physiopathology*; D058585:Vestibular Evoked Myogenic Potentials
keywords: Evoked potentials; Hearing loss; Vertigo; Vestibular function tests