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KMID : 1235520170160020064
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Research in Vestibular Science
2017 Volume.16 No. 2 p.64 ~ p.68
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Extremely Long Latency Benign Paroxysmal Positional Vertigo
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Abrahamsen Emil Riis
Hougaard Dan Dupont
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Abstract
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Case history of a 67-year-old man diagnosed with posterior benign paroxysmal positional vertigo (BPPV) with extremely long latencies after holding the Dix-Hallpike position for five minutes. Additional vestibular assessment indicated partial unilateral hypofunction. The patient had a history compatible with classic BPPV. This patient, however, did not have any positional nystagmus after doing standard positional testing. With extremely prolonged Dix-Hallpike testing (five minutes), the patient experienced nausea and vertigo. Concomitantly classic peripheral nystagmus was observed. After a total of seventeen treatments in a reposition chair a total relief of symptoms was obtained. The extremely long latencies observed in this patient were ascribed to otoconial adherence and/or otoconial size. This type of BPPV has not previously been described.
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KEYWORD
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Vestibular diseases, Benign paroxysmal positional vertigo, Vestibular function tests, Semicircular canals, Nystagmus, Pathological
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