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Evaluation of video head impulse test during vertiginous attack in vestibular migraine
(PACINI EDITORE, 2022-01-01) Koc, Ahmet; Akkilic, Elvan Cevizci
Objective. The aim of this study is to evaluate vestibular functions with video head impulse test (VHIT) and to understand the value of VHIT in differential diagnosis in patients with vestibular migraine (VM) during dizziness attack. Materials and methods. Two groups were enrolled in this study. The first consisted of 84 vestibular migraine patients, and second group of 74 healthy subjects. VHIT was applied to patients with VM during vertigo attack and the results were compared with the VHIT values applied to subjects in the control group. Results. The mean vestibulo-ocular reflex (VOR) in all semicircular canals in the VM group was lower than healthy individuals, but the results were not statistically significant. Refixa-tion saccades were found in 52.3\% of VM patients and in 10.2\% of healthy individuals. Conclusions. When patients with VM were evaluated with VHIT during vertiginous attack, VOR gain values were not different from healthy individuals, but the number of catch-up saccades were higher in VM patients, which indicates peripheral vestibular involvement. For differential diagnosis in patients with VM, vestibular tests should be performed dur-ing the vertigo attack. When evaluating VHIT results, the presence of refixation saccades should also be evaluated.