title: Vibration- and hyperventilation-induced nystagmus in patients with Ramsay Hunt syndrome with vertigo.
abstract: OBJECTIVE
  The aims of this study were to compare vibration-induced nystagmus (VIN) and hyperventilation-induced nystagmus (HVIN) findings in patients with Ramsay Hunt syndrome with vertigo (RHS-V), sudden sensorineural hearing loss with vertigo (SSNHL-V), and vestibular neuritis (VN) during the acute stage and to address the possible lesion sites of vestibular deficit in RHS-V.
  
  
  METHODS
  Case series with chart review.
  
  
  METHODS
  Tertiary referral center.
  
  
  METHODS
  We conducted a retrospective case series study in 27 patients with SSNHL-V, 104 patients with VN, and 17 patients with RHS-V and evaluated the findings of VIN and HVIN tests.
  
  
  RESULTS
  An abnormal VIN was observed in 91% of the patients with VN, 89% of those with SSNHL-V, and 94% of those with RHS-V, and the prevalence of abnormal VIN was not significantly different (P = .436). An abnormal HVIN was observed in 51% of the patients with VN, 22% of those with SSNHL-V, and 59% of those with RHS-V. While the prevalence of an abnormal HVIN was significantly different between SSNHL-V and VN groups (P = .007) and between SSNHL-V and RHS-V groups (P = .014), that between VN and RHS-V groups did not show a significant difference (P = .547).
  
  
  CONCLUSIONS
  Since the results of HVIN in RHS-V patients were more similar to those in VN patients than those in SSNHL-V patients, a lesioned site may be more likely within the vestibular nerve than the inner ear as a cause for vestibular deficit in patients with RHS-V who show caloric canal paresis of 25% or greater.
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South Korea 20110552@kuh.ac.kr.
authors: Chang-Hee
authors: CH
authors: Kim
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South Korea.
authors: Kyung-Hwa
authors: KH
authors: Jeong
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South Korea.
authors: Sung Hwan
authors: SH
authors: Ahn
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South Korea.
authors: Dong Hyuk
authors: DH
authors: Shin
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South Korea.
authors: Yong Won
authors: YW
authors: Kim
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South Korea.
authors: Jung Eun
authors: JE
authors: Shin
mesh_terms: D000328:Adult; D005260:Female; D006319:Hearing Loss, Sensorineural; D016697:Herpes Zoster Oticus / Q000453:epidemiology*; D006801:Humans; D006985:Hyperventilation / Q000150:complications; D008297:Male; D008875:Middle Aged; D009759:Nystagmus, Pathologic / Q000453:epidemiology*; D014724:Vestibular Function Tests; D020338:Vestibular Neuronitis; D014732:Vibration / Q000009:adverse effects
keywords: Ramsay Hunt syndrome; hyperventilation-induced nystagmus; sudden sensorineural hearing loss; vertigo; vestibular neuritis; vibration-induced nystagmus