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Related Experiment Video

Updated: May 12, 2026

Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
08:38

Testing of all Six Semicircular Canals with Video Head Impulse Test Systems

Published on: April 18, 2019

[The video head impulse test: first clinical experiences].

A Blödow1, R Helbig, N Wichmann

  • 1Klinik für Hals-, Nasen-, Ohrenheilkunde, Plastische Chirurgie und Kommunikationsstörungen, Helios-Klinikum Berlin-Buch, Schwanebecker Chaussee 50, 13125, Berlin, Deutschland. alexander.bloedow@helios-kliniken.de

HNO
|April 17, 2013
PubMed
Summary
This summary is machine-generated.

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The video head impulse test (vHIT) reliably assesses horizontal vestibulo-ocular reflex (hVOR) function, identifying peripheral vestibular disorders. This bedside tool detects both overt and covert catch-up saccades, aiding in dizziness diagnosis.

Area of Science:

  • Neurology
  • Ophthalmology
  • Otolaryngology

Background:

  • Peripheral vestibular receptor function requires side-specific testing.
  • The video head impulse test (vHIT) measures eye and head velocity during rapid head impulses.
  • vHIT provides objective vestibulo-ocular reflex (VOR) information and detects catch-up saccades.

Purpose of the Study:

  • To examine the horizontal VOR (hVOR) using vHIT in patients with vestibular syndrome.
  • To assess the clinical utility of vHIT in diagnosing peripheral vestibular disorders.

Main Methods:

  • vHIT was performed on 142 consecutive patients with acute or chronic vestibular syndrome.
  • A control group of 20 healthy volunteers was included for comparison.
  • Analysis focused on VOR gain and the presence of re-fixation saccades (overt and covert).

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Last Updated: May 12, 2026

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Main Results:

  • Healthy controls showed a normal average VOR gain of 0.97 ± 0.09.
  • 47.6% of patients exhibited pathological vHIT results, while 52.4% were normal.
  • Covert catch-up saccades were detected in 13.7% of patients; overt saccades were more common.

Conclusions:

  • vHIT enables side-specific, quantitative assessment of hVOR.
  • vHIT is a reliable tool for vestibular testing, even in bedside examinations for dizziness patients.