VOR gain calculation methods in video head impulse recordings.

ABSTRACT:

Background

International consensus on best practices for calculating and reporting vestibular function is lacking. Quantitative vestibulo-ocular reflex (VOR) gain using a video head impulse test (HIT) device can be calculated by various methods.

Objective

To compare different gain calculation methods and to analyze interactions between artifacts and calculation methods.

Methods

We analyzed 1300 horizontal HIT traces from 26 patients with acute vestibular syndrome and calculated the ratio between eye and head velocity at specific time points (40 ms, 60 ms) after HIT onset ('velocity gain'), ratio of velocity slopes ('regression gain'), and ratio of area under the curves after de-saccading ('position gain').

Results

There was no mean difference between gain at 60

SUBMITTER: Zamaro E 

PROVIDER: S-EPMC9037838 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature