ABS TRACT Objective:The aim of this study is to objectively evaluate all semicircular canal gains using the video head impulse test (vHIT) in patients with posterior canal benign paroxysmal positional vertigo (BPPV). Material and Methods: Between May 2022 and September 2024, 28 posterior canal BPPV patients with a positive Dix-Hallpike test, negative other clinical vestibular tests, and no spontaneous nystagmus were evaluated.A control group of 23 healthy individuals was included.All participants underwent vHIT, and the gain values of the semicircular canals (horizontal, left anterior right posterior, and right anterior left posterior) were measured.Vitamin D levels of the patient and control groups were also retrospectively reviewed.Results: The mean age of the patient group was 48.042.45years, with 17.89% male and 82.14% female.A total of 10 right and 18 left posterior canal BPPV cases were identified.Compared with the control group, the patient group showed significantly reduced gain values in the right horizontal, left horizontal, and left posterior canals on vHIT assessment.Although vitamin D levels were lower on average in the BPPV group, the difference was not statistically significant.Conclusion: The lower posterior canal gain values measured by vHIT in posterior canal BPPV patients compared with the control group suggest that this test may contribute to understanding the pathophysiology and diagnostic evaluation of BPPV.vHIT may be considered a supportive tool in the diagnostic process, particularly in atypical or recurrent BPPV cases.
AKÇAY et al. (Thu,) studied this question.