Recovery of the horizontal vestibulo-ocular reflex in motorized head impulse test is common after vestibular loss

Jutila, Topi; Aalto, Heikki; Hirvonen, Timo

doi:10.3109/00016489.2012.656763

Cited by 9 publications

(5 citation statements)

References 21 publications

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“…Similar observations were described by Jutila et al who examined patients with acute vestibular loss using vHIT on day 3 and at 3 months after the occurrence of vestibular symptoms. There was a highly significant improvement in gain from deteriorated to normal values as well as a decrease in previously existing asymmetry (54). Ibrahim et al (55) demonstrated that cochlear implantation had no significant effect on the outcome of vHIT, consistent with our observations.…”

Section: Video Head Impulse Testsupporting

confidence: 91%

Vertigo Associated With Cochlear Implant Surgery: Correlation With Vertigo Diagnostic Result, Electrode Carrier, and Insertion Angle

et al. 2021

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Objective: Vertigo is a common side effect of cochlear implant (CI) treatment. This prospective study examines the incidence of postoperative vertigo over time and aims to analyze influencing factors such as electrode design and insertion angle (IA).Study Design and Setting: This is a prospective study which has been conducted at a tertiary referral center (academic hospital).Patients: A total of 29 adults were enrolled and received a unilateral CI using one of six different electrode carriers, which were categorized into “structure-preserving” (I), “potentially structure-preserving” (II), and “not structure-preserving” (III).Intervention: Subjective vertigo was assessed by questionnaires at five different time-points before up to 6 months after surgery. The participants were divided into four groups depending on the time of the presence of vertigo before and after surgery. Preoperatively and at 6 months postoperatively, a comprehensive vertigo diagnosis consisting of Romberg test, Unterberger test, subjective visual vertical, optokinetic test, video head impulse test, and caloric irrigation test was performed. In addition, the IA was determined, and the patients were divided in two groups (<430°; ≥430°).Main Outcome Measures: The incidence of vertigo after CI surgery (group 1) was reported, as well as the correlation of subjective vertigo with electrode array categories (I–III) and IA.Results: Among the participants, 45.8% experienced new vertigo after implantation. Based on the questionnaire data, a vestibular origin was suspected in 72.7%. The results did not show a significant correlation with subjective vertigo for any of the performed tests. In group 1 with postoperative vertigo, 18% of patients showed conspicuous results in a quantitative analysis of caloric irrigation test despite the fact that the category I or II electrodes were implanted, which are suitable for structure preservation. Average IA was 404° for the overall group and 409° for group 1. There was no statistically significant correlation between IA and perceived vertigo.Conclusions: Though vertigo after CI surgery seems to be a common complication, the test battery used here could not objectify the symptoms. Further studies should clarify whether this is due to the multifactorial cause of vertigo or to the lack of sensitivity of the tests currently in use. The proof of reduced probability for vertigo when using atraumatic electrode carrier was not successful, nor was the proof of a negative influence of the insertion depth.

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Section: Video Head Impulse Testsupporting

confidence: 91%

Vertigo Associated With Cochlear Implant Surgery: Correlation With Vertigo Diagnostic Result, Electrode Carrier, and Insertion Angle

et al. 2021

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“…Other than differing in techniques for recording eye and head movements, the methods in evaluating gain in horizontal VOR differ. Gain can be calculated as the ratio of eye to head acceleration, as the ratio of eye to head velocity, or the ratio of the AUC for eye velocity divided by the AUC for head velocity . In addition, gain can be calculated over different time intervals, such as for several milliseconds before the peak head velocity, several milliseconds before the peak head acceleration, several milliseconds after the head movement onset or while the head and eyes are moving.…”

Section: Discussionmentioning

confidence: 99%

Quantitative analysis of gains and catch‐up saccades of video‐head‐impulse testing by age in normal subjects

Yang

Lee

Kang

et al. 2016

Clinical Otolaryngology

106

107

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vHIT gains were consistently equal to 1.0 in all age groups (20's to 60's), suggesting that abnormal criteria for vHIT gain (e.g. 0.8) and gain asymmetry (e.g. 8%) can be used, regardless of age. CSs were observed in about half of normal ears, suggesting that VOR is a hypometric system. The amplitudes and interaural difference of CSs were also similar in all age groups, suggesting that abnormal criteria for CS amplitude (e.g. 100°/s) and interaural difference (e.g. 40°/s) can be used, regardless of age.

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“…Offensichtlich war die GA als Instrument zur Markierung einer einseitigen peripher-vestibulären Störung in der Kohorte nicht geeignet. Beim Vergleich mit der Literatur ist zunächst bemerkenswert, dass sehr unterschiedliche Grenzwerte für eine pathologische GA vorgeschlagen werden, die von 4-40 % reichen [8,19,31,32,[35][36][37]. Dies allein muss die Belastbarkeit einer auf dieser Größe basierenden Aussage in Frage stellen.…”

Section: Vorkommen Von Pathologischen V-kit-parameternunclassified

“…Die Software sollte nur geeignete Kopfimpulse zur Auswertung mit Berechnung des Gain zulassen [27]. Studien mit apparativ kontrollierten Kopfimpulsen konnten diese Probleme nicht zufriedenstellend beheben [33,35].…”

Section: Vorkommen Von Pathologischen V-kit-parameternunclassified

Video-Kopfimpulstest: geringer Nutzen zur Unterscheidung peripherer und zentraler Schwindel

Patscheke¹,

Plenz²,

Ernst³

et al. 2017

Laryngo-Rhino-Otol

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Recovery of the horizontal vestibulo-ocular reflex in motorized head impulse test is common after vestibular loss

Cited by 9 publications

References 21 publications

Vertigo Associated With Cochlear Implant Surgery: Correlation With Vertigo Diagnostic Result, Electrode Carrier, and Insertion Angle

Vertigo Associated With Cochlear Implant Surgery: Correlation With Vertigo Diagnostic Result, Electrode Carrier, and Insertion Angle

Quantitative analysis of gains and catch‐up saccades of video‐head‐impulse testing by age in normal subjects

Video-Kopfimpulstest: geringer Nutzen zur Unterscheidung peripherer und zentraler Schwindel

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