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Video Head Impulse Test (vHIT): Value of Gain and Refixation Saccades in Unilateral Vestibular Neuritis

The aim of this study was to evaluate gain and refixation saccades (covert and overt) using a video head impulse test (vHIT) in the horizontal and vertical planes in patients after the onset of unilateral acute vestibular neuritis (AVN). Thirty-five patients were examined in the acute stage of AVN a...

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Autores principales: Psillas, George, Petrou, Ioanna, Printza, Athanasia, Sfakianaki, Ioanna, Binos, Paris, Anastasiadou, Sofia, Constantinidis, Jiannis
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9224852/
https://www.ncbi.nlm.nih.gov/pubmed/35743536
http://dx.doi.org/10.3390/jcm11123467
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author Psillas, George
Petrou, Ioanna
Printza, Athanasia
Sfakianaki, Ioanna
Binos, Paris
Anastasiadou, Sofia
Constantinidis, Jiannis
author_facet Psillas, George
Petrou, Ioanna
Printza, Athanasia
Sfakianaki, Ioanna
Binos, Paris
Anastasiadou, Sofia
Constantinidis, Jiannis
author_sort Psillas, George
collection PubMed
description The aim of this study was to evaluate gain and refixation saccades (covert and overt) using a video head impulse test (vHIT) in the horizontal and vertical planes in patients after the onset of unilateral acute vestibular neuritis (AVN). Thirty-five patients were examined in the acute stage of AVN and at follow-up (range, 6–30 months); a control group of 32 healthy subjects also participated. At onset, the mean gain was significantly lower on the affected side in all of the semi-circular canal planes, mainly in the horizontal canal plane, and saccades (covert and overt) were more prevalent in the horizontal compared to the vertical canal planes. Multi-canal affection occurred more frequently (80% for gain, 71% for saccades) than isolated canal affection. At follow-up, which ranged from 6 to 30 months, the gain was recovered in all of the canals (anterior in 50%, horizontal in 42.8%, and posterior canal in 41.1% of cases), while covert and overt saccades were reduced in the horizontal and vertical planes. However, covert saccades were still recorded in a greater proportion (69%) than overt saccades (57%) in the horizontal plane and at a lower rate in the vertical planes. The compensatory mechanisms after AVN mainly involve the horizontal canal, as the refixation saccades—especially covert ones—were more frequently recorded in the horizontal than vertical canals.
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spelling pubmed-92248522022-06-24 Video Head Impulse Test (vHIT): Value of Gain and Refixation Saccades in Unilateral Vestibular Neuritis Psillas, George Petrou, Ioanna Printza, Athanasia Sfakianaki, Ioanna Binos, Paris Anastasiadou, Sofia Constantinidis, Jiannis J Clin Med Article The aim of this study was to evaluate gain and refixation saccades (covert and overt) using a video head impulse test (vHIT) in the horizontal and vertical planes in patients after the onset of unilateral acute vestibular neuritis (AVN). Thirty-five patients were examined in the acute stage of AVN and at follow-up (range, 6–30 months); a control group of 32 healthy subjects also participated. At onset, the mean gain was significantly lower on the affected side in all of the semi-circular canal planes, mainly in the horizontal canal plane, and saccades (covert and overt) were more prevalent in the horizontal compared to the vertical canal planes. Multi-canal affection occurred more frequently (80% for gain, 71% for saccades) than isolated canal affection. At follow-up, which ranged from 6 to 30 months, the gain was recovered in all of the canals (anterior in 50%, horizontal in 42.8%, and posterior canal in 41.1% of cases), while covert and overt saccades were reduced in the horizontal and vertical planes. However, covert saccades were still recorded in a greater proportion (69%) than overt saccades (57%) in the horizontal plane and at a lower rate in the vertical planes. The compensatory mechanisms after AVN mainly involve the horizontal canal, as the refixation saccades—especially covert ones—were more frequently recorded in the horizontal than vertical canals. MDPI 2022-06-16 /pmc/articles/PMC9224852/ /pubmed/35743536 http://dx.doi.org/10.3390/jcm11123467 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Psillas, George
Petrou, Ioanna
Printza, Athanasia
Sfakianaki, Ioanna
Binos, Paris
Anastasiadou, Sofia
Constantinidis, Jiannis
Video Head Impulse Test (vHIT): Value of Gain and Refixation Saccades in Unilateral Vestibular Neuritis
title Video Head Impulse Test (vHIT): Value of Gain and Refixation Saccades in Unilateral Vestibular Neuritis
title_full Video Head Impulse Test (vHIT): Value of Gain and Refixation Saccades in Unilateral Vestibular Neuritis
title_fullStr Video Head Impulse Test (vHIT): Value of Gain and Refixation Saccades in Unilateral Vestibular Neuritis
title_full_unstemmed Video Head Impulse Test (vHIT): Value of Gain and Refixation Saccades in Unilateral Vestibular Neuritis
title_short Video Head Impulse Test (vHIT): Value of Gain and Refixation Saccades in Unilateral Vestibular Neuritis
title_sort video head impulse test (vhit): value of gain and refixation saccades in unilateral vestibular neuritis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9224852/
https://www.ncbi.nlm.nih.gov/pubmed/35743536
http://dx.doi.org/10.3390/jcm11123467
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