A Possible Role of Video-Head Impulse Test in Detecting Canal Involvement in Benign Paroxysmal Positional Vertigo Presenting With Positional Downbeat Nystagmus

Conclusions: PDN can be due to both peripheral and central vestibular pathologies. In case of BPPV, involvement of the non-ampullary arm of the PC is hardly distinguishable from contralateral AC canalolithiasis. In these situations, vHIT may play a key role in the differential diagnosis. Considering these findings, we propose to include vHIT in the test battery of patient with PDN, as it may provide clues to the differential diagnosis with central pathologies enabling the identification of the canal involved by BPPV.
Source: Otology and Neurotology - Category: ENT & OMF Tags: VESTIBULAR DISORDERS Source Type: research