Clinical Application of Video Head Impulse Test in Acute Vestibular Syndrome

Yoo, Myung Hoon

doi:10.3342/kjorl-hns.2019.00850

Cited by 4 publications

(4 citation statements)

References 42 publications

(71 reference statements)

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“…This is very good news; the test does not (excessively) distress subjects when carefully performed. 17) The vHIT revealed the greatest difference between the Eel and Lel groups. Therefore, if using only one test, the vHIT is perhaps optimal.…”

Section: Discussionmentioning

confidence: 90%

Age-Related Differences of Vestibulo-Ocular Reflex Gains Based on Presbyvestibulopathy Objective Criteria

Choi¹,

Park²,

Song³

et al. 2022

Korean J Otorhinolaryngol-Head Neck Surg

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Background and Objectives With the growing acknowledgment of age-related vestibular impairments, consensus diagnostic criteria for presbyvestibulopathy (PVP) have been recently published. The PVP criteria retains its objectivity with video head impulse test (vHIT), rotatory chair test (RCT) and caloric test. These objective tests share testing principles, but targeted frequencies vary across the tests. The PVP criteria are applicable for subjects of age over 60. However, there are different age cut-offs for older male in different areas. The purpose of the present study was to explore whether the PVP diagnostic criteria were appropriate for early elderly (Eel) patients and to identify the most sensitive test for age-related loss of vestibular function.Subjects and Method Eligible patients, aged 60 years or older, complained of dizziness for at least 3 weeks, and have undergone at least one of the followings: vHIT, RCT, or caloric test. We selected two groups based on age: the Eel group (aged >60 years but <65 years) and the late elderly (Lel) group (aged ≥75 years).Results The vestibulo-ocular reflex (VOR) gains differed significantly between the Eel and Lel groups for vHIT and caloric gain test. No Eel patient met the PVP criteria but 26.1% of Lel patients met the criteria for vHIT, and the proportions of such patients in the two groups differed significantly.Conclusion Eel subjects could be considered to differ from Lel subjects. Given the significance of both averages, VOR difference and the proportional difference in terms of meeting the PVP criteria and vHIT may be optimal when evaluating age-related changes.

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Section: Discussionmentioning

confidence: 90%

Age-Related Differences of Vestibulo-Ocular Reflex Gains Based on Presbyvestibulopathy Objective Criteria

Choi¹,

Park²,

Song³

et al. 2022

Korean J Otorhinolaryngol-Head Neck Surg

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“…Previous studies have identified various disorders presenting with AVS, including VN, brainstem lesions, and cerebellar infarction (Venhovens et al, 2016;Yao et al, 2018a;Kerber, 2020). However, those studies mainly focused on distinguishing central lesions involving the brainstem or cerebellum from VN; little attention was paid to other causes of AVS, such as otitis media and vestibular schwannoma (Venhovens et al, 2016;Yao et al, 2018a;Kerber, 2020). In this study, we enrolled a large number of patients to understand the composition of AVS, which can help deepen our understanding of AVS, and quickly distinguish peripheral from central AVS.…”

Section: Discussionmentioning

confidence: 99%

“…Our previous study, with a relatively small sample size of 77 patients, classified AVS into various specific disorders (Yao et al, 2018a). The purpose of this study was to explore vestibular disorders that can be attributed to AVS.…”

Section: Introductionmentioning

confidence: 99%

Challenges and Current Research Status of Vertigo/Vestibular Diseases

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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“…Therefore, contribution from both symmetrically orientated vestibular organs is required at higher peak head velocities to produce symmetric responses in all head movement directions. Current VI trials involve unilateral implantation/stimulation, thus (partially) mimicking the "asymmetrical" unilateral vestibular function [Yoo, 2020]. Consequently, one can expect the eVOR to also show this asymmetry with higher gains for the excitatory stimulation.…”

Section: Introductionmentioning

confidence: 99%

Optimized Signal Analysis to Quantify the Non-Linear Behaviour of the Electrically Evoked Vestibulo-Ocular Reflex in Patients with a Vestibular Implant

et al. 2022

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Introduction: Different eye movement analysis algorithms are used in vestibular implant research to quantify the electrically evoked vestibulo-ocular reflex (eVOR). Often, standard techniques are used as applied for quantification of the natural VOR in healthy subjects and patients with vestibular loss. However, in previous research, it was observed that the morphology of the VOR and eVOR may differ substantially. In this study, it was investigated if the analysis techniques for eVOR need to be adapted to optimize a truthful quantification of the eVOR (VOR gain, orientation of the VOR axis, asymmetry, and phase shift). Methods: “Natural” VOR responses were obtained in six age-matched healthy subjects, and eVOR responses were obtained in eight bilateral-vestibulopathy patients fitted with a vestibular implant. Three conditions were tested: “nVOR” 1-Hz sinusoidal whole-body rotations of healthy subjects in a rotatory chair, “eVOR” 1-Hz sinusoidal electrical vestibular implant stimulation without whole-body rotations in bilateral-vestibulopathy patients, and “dVOR” 1-Hz sinusoidal whole-body rotations in bilateral-vestibulopathy patients using the chair-mounted gyroscope output to drive the electrical vestibular implant stimulation (therefore also in sync 1 Hz sinusoidal). VOR outcomes were determined from the obtained VOR responses, using three different eye movement analysis paradigms: (1) peak eye velocity detection using the raw eye traces; (2) peak eye velocity detection using full-cycle sine fitting of eye traces; (3) peak eye velocity detection using half-cycle sine fitting of eye traces. Results: The type of eye movement analysis algorithm significantly influenced VOR outcomes, especially regarding the VOR gain and asymmetry of the eVOR in bilateral-vestibulopathy patients fitted with a vestibular implant. Full-cycle fitting lowered VOR gain in the eVOR condition (mean difference: 0.14 ± 0.06 95% CI, p = 0.018). Half-cycle fitting lowered VOR gain in the dVOR condition (mean difference: 0.08 ± 0.04 95% CI, p = 0.009). In the eVOR condition, half-cycle fitting was able to demonstrate the asymmetry between the excitatory and inhibitory phases of stimulation in comparison with the full-cycle fitting (mean difference: 0.19 ± 0.12 95% CI, p = 0.024). The VOR axis and phase shift did not differ significantly between eye movement analysis algorithms. In healthy subjects, no clinically significant effect of eye movement analysis algorithms on VOR outcomes was observed. Conclusion: For the analysis of the eVOR, the excitatory and inhibitory phases of stimulation should be analysed separately due to the inherent asymmetry of the eVOR. A half-cycle fitting method can be used as a more accurate alternative for the analysis of the full-cycle traces.

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Clinical Application of Video Head Impulse Test in Acute Vestibular Syndrome

Cited by 4 publications

References 42 publications

Age-Related Differences of Vestibulo-Ocular Reflex Gains Based on Presbyvestibulopathy Objective Criteria

Age-Related Differences of Vestibulo-Ocular Reflex Gains Based on Presbyvestibulopathy Objective Criteria

Challenges and Current Research Status of Vertigo/Vestibular Diseases

Optimized Signal Analysis to Quantify the Non-Linear Behaviour of the Electrically Evoked Vestibulo-Ocular Reflex in Patients with a Vestibular Implant

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