Detection of isolated covert saccades with the video head impulse test in peripheral vestibular disorders

Blödow, Alexander; Pannasch, Sebastian; Walther, Leif Erik

doi:10.1016/j.anl.2012.11.002

Cited by 148 publications

(120 citation statements)

References 21 publications

Supporting

Mentioning

103

Contrasting

Unclassified

Order By: Relevance

“…Compared to the head impulse test (Halmagyi test), in which the clinician directly assesses the vestibule ocular reflex (VOR), the sensitivity of video HIT is higher because covert saccades can be detected and vestibular dysfunction in the affected ear can be documented (49). However, if it is not an acute attack, a clear pathology cannot be seen even through video HIT.…”

Section: Caloric Test and Head Impulse Test (Hit)/video Hitmentioning

confidence: 99%

“…While abnormal HIT findings are noticed in only 40% of patients who have abnormal findings in caloric tests, the rate of abnormal HIT findings is 10% in ears with normal caloric responses (46). HIT and video HIT are more specific but less sensitive than caloric tests, but they can provide quite useful information (46,49). In advanced-stage MD cases, even if caloric responses disappear, high-frequency VOR functions can be protected substantially.…”

Section: Caloric Test and Head Impulse Test (Hit)/video Hitmentioning

confidence: 99%

See 1 more Smart Citation

Validity and Reliability of the Diagnostic Tests for Ménière's Disease

Günerı

Çakır

Mutlu

2016

Turk Arch Otorhinolaryngol

View full text Add to dashboard Cite

Ménière's disease is defined as an idiopathic syndrome characterized by endolymphatic hydrops. Various tests and measurement methods have been employed for the diagnosis of Ménière's disease. These include audiological, vestibular, radiological, clinical, and biochemical tests. However, the lack of a definitive or gold standard diagnostic test sometimes complicates the process of diagnosis. Hence, the clinician should be well-experienced in deciding when to perform a test and how to interpret the results of the test. Furthermore, having the knowledge of the validity and reliability of these tests plays a critical role. This review particularly emphasizes on remarking the validity and reliability of each test performed for the diagnosis of Ménière's disease and discussing the results according to the up-to-date literature.

show abstract

Section: Caloric Test and Head Impulse Test (Hit)/video Hitmentioning

confidence: 99%

Section: Caloric Test and Head Impulse Test (Hit)/video Hitmentioning

confidence: 99%

Validity and Reliability of the Diagnostic Tests for Ménière's Disease

Günerı

Çakır

Mutlu

2016

Turk Arch Otorhinolaryngol

View full text Add to dashboard Cite

show abstract

“…In a group of normal subjects and patients with vestibular neuritis, it mimicked the performance of the scleral search coil (SSC) in a magnetic field installation [10] . This system seems to work not only for the initial evaluation of the vast majority of dizzy patients [11] but also for follow-up [12] .…”

Section: Introductionmentioning

confidence: 99%

Normal Gain of VOR with Refixation Saccades in Patients with Unilateral Vestibulopathy

Pérez-Fernández

Eza-Nuñez²

2015

Int Adv Otol

View full text Add to dashboard Cite

OBJECTIVE:To characterize the response in the video head-impulse test for the assessment of the vestibulo-ocular reflex (VOR) in patients because of vertigo and dizziness. MATERIALS and METHODS:After rightward and leftward head impulses, the following results evaluated were: gain of the reflex and appearance of refixation saccades. A particular type of response (normal gain VOR and refixation saccades) was evaluated in a group of patients. RESULTS:In patients with a unilateral abnormality consisting of normal gain and refixation saccades, there was a close concordance with the diseased side and the side to which head impulses elicited the abnormal result. CONCLUSION:In the assessment of patients with dizziness, finding a normal gain VOR with refixation saccades indicates the existence of a peripheral vestibulopathy and localizes to the side of the lesion.

show abstract

“…New video-based equipment that enables registration of the eye response to sudden head impulses mimicking the performance of the scleral search coil (SSC) in a magnetic field installation has recently become available for clinical use [3,4] . With this video head-impulse test (vHIT) system, it is possible to measure the gain of the vestibulo-ocular reflex (VOR) and to register eventual refixation saccades with stimulations (head impulses) that acquire high velocity (>150º/s) and acceleration (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16). This system is good not only for initial evaluation of the patient but also for follow-up, as has been demonstrated in patients with MD with rapid fluctuations in vestibular function [5] .…”

Section: Introductionmentioning

confidence: 99%

The Caloric Test and the Video Head-Impulse Test in Patients with Vertigo

Eza-Nuñez¹,

Fariñas‐Álvarez²,

Pérez-Fernández³

2014

Int Adv Otol

View full text Add to dashboard Cite

OBJECTIVE:The caloric test and the video head-impulse test are diagnostic tools that examine the function of the horizontal semicircular canal. There are major differences between the two tests. These are stimulus characteristics, methodology, and function examined. MATERIALS and METHODS:This is a prospective work in 123 patients with different types of vestibular disease seen because of dizziness in which both procedures were performed the same day. First, the spontaneous nystagmus and head-shake nystagmus were measured. The video head-impulse test was carried out, and finally, the caloric test was performed with water at two different temperatures. Both ears were irrigated alternately. Main outcome measures were the canal paresis in the caloric test and gain of vestibulo-ocular reflex, gain asymmetry, and refixation saccades in the vHIT. RESULTS:The caloric test and the vHIT results were fully coincident in 60 patients (48.7%), and the results for both were normal in 36 patients. Discrepancies were found in 3 patients regarding the deficient side, and in 14 patients, an added contralateral (according to the caloric test) abnormal result was obtained. In 46 patients, one of the tests was normal while the other was not, but both were in accordance with the diseased side. The correlation coefficient for canal paresis and gain asymmetry was 0.67, and the agreement was low: κ=0.252. CONCLUSION:The assessment of horizontal semicircular canal function with the vHIT needs to take into consideration not only the gain in VOR but also the existence of refixation saccades. The information from both methods is redundant in some cases but complementary in most, and the existence of discrepancies is very low.

show abstract

Detection of isolated covert saccades with the video head impulse test in peripheral vestibular disorders

Cited by 148 publications

References 21 publications

Validity and Reliability of the Diagnostic Tests for Ménière's Disease

Validity and Reliability of the Diagnostic Tests for Ménière's Disease

Normal Gain of VOR with Refixation Saccades in Patients with Unilateral Vestibulopathy

The Caloric Test and the Video Head-Impulse Test in Patients with Vertigo

Contact Info

Product

Resources

About