title: Horizontal canal benign paroxysmal positioning vertigo with ipsilateral hearing loss.
abstract: The etiology of benign paroxysmal positioning vertigo (h-BPPV) of the horizontal semicircular is unknown. Insight was obtained from two patients with h-BPPV and associated hearing impairment. Based on the different inner ear lesion patterns in neurolabyrinthitis contrary to ischemic labyrinthine infarction we assessed multiple vestibulo-cochlear functions for the first time in two patients who suffered from h-BPPV with sudden unilateral hearing loss. While in patient no. 1 the lesion pattern (posterior canal paresis in addition to the sudden hearing loss) could possibly be caused by ischemia of the common cochlear artery, the lesion pattern of patient no. 2 (hearing loss and ipsilateral paresis of the posterior and horizontal semicircular canal) exceeds the typical vascular labyrinthine territories and may indicate viral neurolabyrinthitis.
authors.affiliation: Department of Neurology, University of Lübeck, Lübeck, Germany. rambold_h@neuro.mu-luebeck.de
authors.forename: H
authors.initials: H
authors.lastname: Rambold
authors.forename: W
authors.initials: W
authors.lastname: Heide
authors.forename: C
authors.initials: C
authors.lastname: Helmchen
mesh_terms: D000328:Adult; D000368:Aged; D004585:Electrooculography; D005260:Female; D007839:Functional Laterality; D034381:Hearing Loss / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology; D012665:Semicircular Canals / Q000473:pathology / Q000503:physiopathology*; D014717:Vertigo / Q000209:etiology / Q000473:pathology / Q000503:physiopathology*; D014724:Vestibular Function Tests