Persistent Upbeat Positional Nystagmus in a Patient with Bilateral Posterior Canal Benign Paroxysmal Positional Vertigo

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ID: 11510
2019
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Abstract
Here, we report a patient with persistent positional upbeat nystagmus in a straight supine position with no evident abnormal central nervous system findings. A 43-year-old woman with rotatory positional vertigo and nausea visited our clinic 7 days after the onset. Initially, we observed persistent upbeat nystagmus in straight supine position with a latency of 2 s during the supine head roll test. However, an upbeat nystagmus disappeared on turning from straight to the left ear-down supine position, and while turning from the left to right ear-down position, an induced slight torsional nystagmus towards the right for >22 s was observed. In the Dix–Hallpike test, the left head-hanging position provoked torsional nystagmus towards the right for 50 s. In prone seated position, downbeat nystagmus with torsional component towards the left was observed for 45 s. Neurological examination and brain computed tomography revealed no abnormal findings. We speculated that persistent positional upbeat nystagmus in this patient was the result of canalolithiasis of benign paroxysmal positional vertigo of bilateral posterior semicircular canals.
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akihide2019persistentcase Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Ichimura, Akihide;Itani, Shigeto;Ichimura, Akihide;Itani, Shigeto;
Journal case reports in otolaryngology
Year 2019
DOI
10.1155/2019/4281641
URL
https://www.hindawi.com/journals/criot/2019/4281641/abs/
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