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Utricular Dysfunction in Refractory Benign Paroxysmal Positional Vertigo.

Simon I Angeli1, Marianne Abouyared2, Hillary Snapp2

  • 1Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, USA sangeli@med.miami.edu.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|April 29, 2014
PubMed
Summary
This summary is machine-generated.

Refractory benign paroxysmal positional vertigo (BPPV) cases show higher rates of abnormal subjective visual vertical (SVV), indicating underlying otolith dysfunction. This suggests tailored rehabilitation strategies are needed for BPPV patients unresponsive to initial treatment.

Keywords:
BPPVotolith dysfunctionrefractory benign paroxysmal positional vertigosacculesubjective visual verticalutriclevertigovestibular testing

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Area of Science:

  • Otolaryngology
  • Neurology
  • Vestibular System Research

Background:

  • Benign paroxysmal positional vertigo (BPPV) is a common cause of vertigo.
  • Refractory BPPV, unresponsive to initial repositioning maneuvers, presents a clinical challenge.
  • Otolith dysfunction may contribute to persistent BPPV symptoms.

Purpose of the Study:

  • To investigate the prevalence of otolith dysfunction in patients with refractory BPPV.
  • To compare vestibular testing results between refractory and non-refractory BPPV patients.
  • To identify potential markers for treatment resistance in BPPV.

Main Methods:

  • An unmatched case-control study was conducted at a tertiary care institution.
  • Patients diagnosed with BPPV who failed initial canalith repositioning maneuvers (CRMs) were included (n=40).
  • Refractory BPPV (n=19) was compared to non-refractory BPPV (n=21) using caloric testing, cervical vestibular evoked myogenic potential (cVEMP), and subjective visual vertical (SVV) tests.

Main Results:

  • No significant differences were found in caloric weakness or cVEMP abnormalities between refractory and non-refractory BPPV groups.
  • Abnormal eccentric SVV was significantly more prevalent in the refractory BPPV group (58%) compared to the non-refractory group (14%).
  • Patients with refractory BPPV had an 8.25 times higher odds of abnormal SVV results.

Conclusions:

  • Refractory BPPV is associated with a higher likelihood of abnormal subjective visual vertical (SVV), suggesting underlying utricular dysfunction.
  • Abnormal SVV may serve as an indicator of treatment resistance in BPPV patients.
  • These findings emphasize the importance of considering otolith function in rehabilitation strategies for refractory BPPV.