title: [Preliminary application of video head impulse test in the diagnosis of vertigo].
abstract: OBJECTIVE
  To investigate clinical application of head impulse test with video recording eye movements in the diagnosis of vertigo.
  
  
  METHODS
  The video head impulse test(vHIT) was used to measure the eye saccades and velocity gain in 95 patients with vertigo which were divided into two groups, peripheral vertigo (47 cases) and central vertigo(48 cases); the characteristics of eye saccades and velocity gain of six semicircular canals in different patients with vertigo were analyzed, and were compared between the two groups.
  
  
  RESULTS
  The vHIT result in patients with peripheral vertigo: in 22 patients (23 affected ears) with Meniere's disease, 21 ears were abnormal (91. 3%); the vHIT results in 4 patients with vestibular schwannoma, 2 patients with vestibular neuritis, 5 patients with delayed endolymphatic hydrops, 6 patients with sudden hearing loss accompanied vertigo, and 8 patients with vestibular dysfunction, were abnormal with correct saccades and/or lower velocity gain of vHIT. The abnormal vHIT results were also found in 35 of 48 patients (72. 9%) with central vertigo, which including posterior cerebral circulation ischemia(7 patients), cerebral infarction/stroke(6 patients), and dizziness with vertigo(17 patients) and others(18 patients). Abnormal rate of vHIT in patients with peripheral vertigo was 95. 7% (45/47), which was significantly higher than that (72. 9%) in patients with central vertigo.
  
  
  CONCLUSIONS
  It is easy to perform the vHIT which without adverse reactions. We can record high-frequency characteristics of vestibular-ocular reflex among six semicircular canals through vHIT. The vHIT results which show the function of vestibular ocular reflex in different diseases with vertigo, can help discriminate peripheral vertigo from central vertigo, and it is a practical assessment method for vertigo.
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Zhang
authors.forename: Siqi
authors.initials: S
authors.lastname: Chen
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhong
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.forename: Yuanding
authors.initials: Y
authors.lastname: Wu
authors.forename: Guiping
authors.initials: G
authors.lastname: Zhao
authors.forename: Yuhe
authors.initials: Y
authors.lastname: Liu
mesh_terms: D004244:Dizziness; D018159:Endolymphatic Hydrops / Q000175:diagnosis; D064087:Head Impulse Test; D006801:Humans; D008575:Meniere Disease / Q000175:diagnosis; D009464:Neuroma, Acoustic / Q000175:diagnosis; D012027:Reflex, Vestibulo-Ocular; D012438:Saccades; D012665:Semicircular Canals; D014717:Vertigo / Q000175:diagnosis*; D020338:Vestibular Neuronitis / Q000175:diagnosis; D014741:Video Recording