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Video head impulse test

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https://www.readbyqxmd.com/read/29142084/impaired-vestibular-responses-in-internuclear-ophthalmoplegia-association-and-dissociation
#1
Seo-Young Choi, Hyo-Jung Kim, Ji-Soo Kim
OBJECTIVE: To determine the role of the medial longitudinal fasciculus (MLF) in conveying vestibular signals. METHODS: In 10 patients with isolated acute unilateral internuclear ophthalmoplegia (INO) due to an acute stroke, we performed comprehensive vestibular evaluation using video-oculography, head impulse tests with a magnetic search coil technique, bithermal caloric tests, tests for the ocular tilt reaction, and measurements of subjective visual vertical and cervical and ocular vestibular evoked myogenic potentials (VEMPs)...
November 15, 2017: Neurology
https://www.readbyqxmd.com/read/29141478/utility-of-quick-oculomotor-tests-for-screening-the-vestibular-system-in-the-subacute-and-chronic-populations
#2
Helen S Cohen, Jasmine Stitz, Haleh Sangi-Haghpeykar, Susan P Williams, Ajitkumar P Mulavara, Brian T Peters, Jacob J Bloomberg
OBJECTIVE: The goal of this study was to determine the sensitivity and specificity of some widely used, easily administered clinical tests. BACKGROUND: Simple tests of oculomotor function have become widely used for clinical screening of patients suspected of having vestibular disorders despite a paucity of evidence showing good statistical support for their use in this highly variable population. METHODS: Healthy controls with no history of otologic or neurologic disorders (n = 291) were compared to patients with known vestibular disorders (n = 62)...
November 16, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/29135873/the-effect-of-peripheral-vestibular-recovery-on-improvements-in-vestibulo-ocular-reflexes-and-balance-control-after-acute-unilateral-peripheral-vestibular-loss
#3
John H J Allum, Alja Scheltinga, Flurin Honegger
BACKGROUND: Patients with an acute unilateral peripheral vestibular deficit (aUPVD), presumed to be caused by vestibular neuritis, show asymmetrical vestibular ocular reflexes (VORs) that improve over time. Questions arise regarding how much of the VOR improvement is due to peripheral recovery or central compensation, and whether differences in peripheral recovery influence balance control outcomes. METHODS: Thirty patients were examined at aUPVD onset and 3, 6, and 13 weeks later with four different VOR tests: caloric tests; rotating (ROT) chair tests performed in yaw with angular accelerations of 5 and 20 degrees/s; and video head impulse tests (vHIT) in the yaw plane...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29110566/predicting-the-outcome-after-acute-unilateral-vestibulopathy-analysis-of-vestibulo-ocular-reflex-gain-and-catch-up-saccades
#4
Niccolò Cerchiai, Elena Navari, Stefano Sellari-Franceschini, Chiara Re, Augusto Pietro Casani
Objectives (1) To describe the relationships among the main instrumental features characterizing an acute unilateral vestibulopathy and (2) to clarify the role of the video head impulse test in predicting the development of chronic vestibular insufficiency. Study Design Case series with chart review. Setting Tertiary referral center. Subjects and Methods Sixty patients suffering from acute unilateral vestibulopathy were retrospectively analyzed: 30 who recovered spontaneously (group 1) and 30 who needed a vestibular rehabilitation program (group 2)...
November 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29102239/comparison-of-the-video-head-impulse-test-with-the-caloric-test-in-patients-with-sub-acute-and-chronic-vestibular-disorders
#5
Anne Burston, Stuart Mossman, Benjamin Mossman, Mark Weatherall
The aim of this prospective register-based study was to compare video Head Impulse Tests (vHIT) with caloric tests on 173 patients assessed by a tertiary Neurology referral centre who had been referred for investigation of dizziness or vertigo and whose symptom duration was one month or longer. Abnormal vHIT was defined as angular velocity gain (peak eye velocity/peak head velocity) less than 0.79 at 80 ms and 0.75 at 60 ms, which was two standard deviations below our institutions' lower limit of normal; together with refixation saccades...
October 25, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29089158/cerebellar-ataxia-with-neuropathy-and-vestibular-areflexia-syndrome-canvas
#6
Masakatsu Taki, Takashi Nakamura, Hiraku Matsuura, Tatsuhisa Hasegawa, Hirofumi Sakaguchi, Kanako Morita, Ryotaro Ishii, Ikuko Mizuta, Takashi Kasai, Toshiki Mizuno, Shigeru Hirano
Cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome (CANVAS) is a novel ataxic disorder consisting of the triad of cerebellar impairment, bilateral vestibular hypofunction, and a somatosensory deficit. We report the first Japanese case of CANVAS. The patient is a 68-year-old Japanese male. He was referred to our university for further evaluation of progressive gait disturbance and ataxia. He exhibited horizontal gaze-evoked nystagmus and sensory deficit. Nerve conduction studies showed sensory neuronopathy...
October 28, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29081427/clinical-and-video-head-impulse-test-in-the-diagnosis-of-posterior-circulation-stroke-presenting-as-acute-vestibular-syndrome-in%C3%A2-the-emergency-department
#7
Ayse Guler, Funda Karbek Akarca, Cenk Eraslan, Ceyda Tarhan, Cem Bilgen, Tayfun Kirazli, Nese Celebisoy
INTRODUCTION: Head impulse test (HIT) is the critical bedside examination which differentiates vestibular neuritis (VN) from posterior circulation stroke (PCS) in acute vestibular syndrome (AVS). Video-oculography based HIT (vHIT) may have aadditional strength in making the differentiation. METHODS: Patients admitted to the emergency department of a tertiary-care medical center with AVS were studied. An emergency specialist and a neurologist performed HIT. vHIT was conducted by an neuro-otology research fellow...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29081426/bilateral-vestibulopathy-diagnostic-criteria-consensus-document-of-the-classification-committee-of-the-b%C3%A3-r%C3%A3-ny-society
#8
Michael Strupp, Ji-Soo Kim, Toshihisa Murofushi, Dominik Straumann, Joanna C Jen, Sally M Rosengren, Charles C Della Santina, Herman Kingma
This paper describes the diagnostic criteria for bilateral vestibulopathy (BVP) by the Classification Committee of the Bárány Society. The diagnosis of BVP is based on the patient history, bedside examination and laboratory evaluation. Bilateral vestibulopathy is a chronic vestibular syndrome which is characterized by unsteadiness when walking or standing, which worsen in darkness and/or on uneven ground, or during head motion. Additionally, patients may describe head or body movement-induced blurred vision or oscillopsia...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29079887/preoperative-determination-of-nerve-of-origin-in-patients-with%C3%A2-vestibular%C3%A2-schwannoma
#9
T Rahne, S Plößl, S K Plontke, C Strauss
BACKGROUND: Vestibular schwannoma (VS) is a benign tumor that develops in the internal auditory canal and the cerebellopontine angle, potentially diminishing hearing or balance. Most VS tumors arise from one of two vestibular branches: the superior or inferior vestibular nerve. Determining the specific nerve of origin could improve patient management in terms of preoperative counseling, treatment selection, and surgical decision-making and planning. The aim of this study was to introduce a novel scoring system that was designed to determine the nerve of origin...
October 27, 2017: HNO
https://www.readbyqxmd.com/read/29064828/differences-in-head-impulse-test-results-due-to-analysis-techniques
#10
Taylor W Cleworth, Mark G Carpenter, Flurin Honegger, John H J Allum
BACKGROUND: Different analysis techniques are used to define vestibulo-ocular reflex (VOR) gain between eye and head angular velocity during the video head impulse test (vHIT). Comparisons would aid selection of gain techniques best related to head impulse characteristics and promote standardisation. OBJECTIVE: Compare and contrast known methods of calculating vHIT VOR gain. METHODS: We examined lateral canal vHIT responses recorded from 20 patients twice within 13 weeks of acute unilateral peripheral vestibular deficit onset...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29018402/preferential-impairment-of-the-contralesional-posterior-semicircular-canal-in-internuclear-ophthalmoplegia
#11
Seung-Han Lee, Sang-Hoon Kim, Sung-Sik Kim, Kyung Wook Kang, Alexander Andrea Tarnutzer
BACKGROUND: The vertical vestibulo-ocular reflex (VOR) may be impaired in internuclear ophthalmoplegia (INO) as the medial longitudinal fasciculus (MLF) conveys VOR-signals from the vertical semicircular canals. It has been proposed that signals from the contralesional posterior semicircular canal (PSC) are exclusively transmitted through the MLF, while for the contralesional anterior canal other pathways exist. OBJECTIVE: Here, we aimed to characterize dysfunction in individual canals in INO-patients using the video-head-impulse test (vHIT) and to test the hypothesis of dissociated vertical canal impairment in INO...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29018011/balance-versus-hearing-after-cochlear-implant-in-an-adult
#12
Oz Zur, Hadas Ben-Rubi Shimron, Gerry Leisman, Eli Carmeli
The effect of vestibular rehabilitation (VR) on anxiety, dizziness and poor balance that developed after cochlear implant (CI) surgery is described. A 54-year-old woman, with profound hearing loss since the age of 2 years, underwent right CI surgery 2 years previously. On implant activation, the patient immediately felt dizziness and imbalance, which affected the ability to perform activities of daily living and increased anxiety to where the patient considered the CI removal. Prior to VR the patient was evaluated with the Dizziness Handicap Inventory and the Visual Vertigo Dizziness Questionnaire and clinically with the Zur Balance Scale and Video Head Impulse Test...
October 10, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28985517/effect-of-common-antivertiginous-agents-on-the-high-velocity-vestibulo-ocular-reflex
#13
E Anagnostou, P Koutsoudaki, A Stavropoulos, I Evdokimidis
OBJECTIVE: It has long been suggested that antivertiginous medications exert their symptomatic effect through inhibition of the vestibulo-ocular reflex (VOR). We tested this hypothesis by directly measuring the VOR after administration of three agents from different substance classes: an antihistamine, a benzodiazepine and a calcium channel antagonist. METHODS: The gain and the variability of the high velocity VOR was assessed using video head impulses (vHIT) under the following conditions: baseline, after dimenhydrinate, after diazepam and after cinnarizine...
September 19, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28980782/-the-video-head-impulse-test-in-the-vertiginous-patient
#14
Lorry Duchoud, Raphaël Maire
The video Head Impulse Test (vHIT) is a new diagnostic device which, in clinical practice, can be used to evaluate the vestibular canal function in a fast and objective way by recording the movements of the eyes and the head. The medical literature makes it possible today to define the place of this device in the care of patients with vertigo.
October 4, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28972467/effects-of-device-on-video-head-impulse-test-vhit-gain
#15
Kristen L Janky, Jessie N Patterson, Neil T Shepard, Megan L A Thomas, Julie A Honaker
BACKGROUND: Numerous video head impulse test (vHIT) devices are available commercially; however, gain is not calculated uniformly. An evaluation of these devices/algorithms in healthy controls and patients with vestibular loss is necessary for comparing and synthesizing work that utilizes different devices and gain calculations. PURPOSE: Using three commercially available vHIT devices/algorithms, the purpose of the present study was to compare: (1) horizontal canal vHIT gain among devices/algorithms in normal control subjects; (2) the effects of age on vHIT gain for each device/algorithm in normal control subjects; and (3) the clinical performance of horizontal canal vHIT gain between devices/algorithms for differentiating normal versus abnormal vestibular function...
October 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28955674/vestibulo-ocular-reflex-abnormalities-in-posterior-semicircular-canal-benign-paroxysmal-positional-vertigo-a-pilot-study
#16
Tayyebe Fallahnezhad, Mansoureh Adel Ghahraman, Saeid Farahani, Reza Hoseinabadi, Shohreh Jalaie
INTRODUCTION: Benign paroxysmal positional vertigo (BPPV), involving the semicircular canals, is one of the most common diseases of the inner ear. The video head impulse test (vHIT) is a new test that examines the function of the canals. This study aimed to investigate the vestibulo-ocular reflex (VOR) gain, gain asymmetry and saccades after stimulating all six canals in patients definitively diagnosed with posterior semicircular canal BPPV (PSC-BPPV). MATERIALS AND METHODS: Twenty-nine unilateral PSC-BPPV patients with normal oculographic and caloric results were enrolled in this study...
September 2017: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28954005/sensitivity-of-caloric-test-and-video-head-impulse-as-screening-test-for-chronic-vestibular-complaints
#17
MULTICENTER STUDY
Raquel Mezzalira, Roseli Saraiva Moreira Bittar, Marcia Maria do Carmo Bilécki-Stipsky, Cibele Brugnera, Signe Schuster Grasel
OBJECTIVE: This study compared the results of the caloric test with those of the video head impulse test obtained during the same session and evaluated whether the former can be used to screen for non-acute vestibular dysfunction. METHODS: A total of 157 participants complaining of dizziness with vestibular characteristics of varying durations and clinical courses completed the caloric test and video head impulse test. RESULTS: Significantly more caloric test results than video head impulse test results were abnormal...
August 2017: Clinics
https://www.readbyqxmd.com/read/28948300/-preoperative-determination-of-nerve-of-origin-in-patients-with-vestibular-schwannoma-german-version
#18
T Rahne, S Plößl, S K Plontke, C Strauss
BACKGROUND: Vestibular schwannoma (VS) is a benign tumor that develops in the internal auditory canal and the cerebellopontine angle, potentially diminishing hearing or balance. Most VS tumors arise from one of two vestibular branches: the superior or inferior vestibular nerve. Determining the specific nerve of origin could improve patient management in terms of preoperative counseling, treatment selection, and surgical decision-making and planning. The aim of this study was to introduce a novel scoring system that was designed to determine the nerve of origin...
September 25, 2017: HNO
https://www.readbyqxmd.com/read/28939919/validity-of-wavelet-transforms-for-analysis-of-video-head-impulse-test-vhit-results
#19
Jorge Rey-Martinez
To explore the applicability of discrete wavelet transforms in the analysis of vHIT responses. Discrete wavelet transform was applied to vHIT responses and a new method for calculating aVOR gain was developed. A prospective study was performed with two groups of normal (N = 10) and altered (N = 19) gain values; HIMP and SHIMP vHIT protocols were performed on both groups. To evaluate the gain values obtained, Intraclass Correlation Index, Pearson's correlation, linear regression, and t test were performed...
December 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28936193/video-head-impulse-tests-with-a-remote-camera-system-normative-values-of-semicircular-canal-vestibulo-ocular-reflex-gain-in-infants-and-children
#20
Sylvette R Wiener-Vacher, Sidney I Wiener
The video head impulse test (VHIT) is widely used to identify semicircular canal function impairments in adults. But classical VHIT testing systems attach goggles tightly to the head, which is not tolerated by infants. Remote video detection of head and eye movements resolves this issue and, here, we report VHIT protocols and normative values for children. Vestibulo-ocular reflex (VOR) gain was measured for all canals of 303 healthy subjects, including 274 children (aged 2.6 months-15 years) and 26 adults (aged 16-67)...
2017: Frontiers in Neurology
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