TY - JOUR
T1 - Quantifying the vestibulo-ocular reflex with video-oculography
T2 - Nature and frequency of artifacts
AU - Mantokoudis, Georgios
AU - Saber Tehrani, Ali S.
AU - Kattah, Jorge C.
AU - Eibenberger, Karin
AU - Guede, Cynthia I.
AU - Zee, David S.
AU - Newman-Toker, David E.
N1 - Publisher Copyright:
© 2014 S. Karger AG, Basel.
PY - 2015/1/13
Y1 - 2015/1/13
N2 - Video-oculography devices are now used to quantify the vestibulo-ocular reflex (VOR) at the bedside using the head impulse test (HIT). Little is known about the impact of disruptive phenomena (e.g. corrective saccades, nystagmus, fixation losses, eye-blink artifacts) on quantitative VOR assessment in acute vertigo. This study systematically characterized the frequency, nature, and impact of artifacts on HIT VOR measures. From a prospective study of 26 patients with acute vestibular syndrome (16 vestibular neuritis, 10 stroke), we classified findings using a structured coding manual. Of 1,358 individual HIT traces, 72% had abnormal disruptive saccades, 44% had at least one artifact, and 42% were uninterpretable. Physicians using quantitative recording devices to measure head impulse VOR responses for clinical diagnosis should be aware of the potential impact of disruptive eye movements and measurement artifacts.
AB - Video-oculography devices are now used to quantify the vestibulo-ocular reflex (VOR) at the bedside using the head impulse test (HIT). Little is known about the impact of disruptive phenomena (e.g. corrective saccades, nystagmus, fixation losses, eye-blink artifacts) on quantitative VOR assessment in acute vertigo. This study systematically characterized the frequency, nature, and impact of artifacts on HIT VOR measures. From a prospective study of 26 patients with acute vestibular syndrome (16 vestibular neuritis, 10 stroke), we classified findings using a structured coding manual. Of 1,358 individual HIT traces, 72% had abnormal disruptive saccades, 44% had at least one artifact, and 42% were uninterpretable. Physicians using quantitative recording devices to measure head impulse VOR responses for clinical diagnosis should be aware of the potential impact of disruptive eye movements and measurement artifacts.
KW - Artifacts
KW - Eye movement measurements
KW - Stroke
KW - Vertigo
KW - Vestibular neuritis
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U2 - 10.1159/000362780
DO - 10.1159/000362780
M3 - Article
C2 - 25501133
AN - SCOPUS:84920853904
SN - 1420-3030
VL - 20
SP - 39
EP - 50
JO - Audiology and Neurotology
JF - Audiology and Neurotology
IS - 1
ER -