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KMID : 1235520150140040117
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Research in Vestibular Science
2015 Volume.14 No. 4 p.117 ~ p.122
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Clinical Characteristics of Horizontal Canal Benign Paroxysmal Positional Vertigo with Persistent Geotropic Direction Changing Positional Nystagmus
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고경민:Ko Kyung-Min
송미현:Song Mee-Hyun/박진우:Park Jin-Woo/이준희:Lee Joon-Hee/신용국:Shin Yong-Gook/심대보:Shim Dae-Bo
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Abstract
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Objective: The purpose of this study was to identify the clinical characteristics of horizontal canal benign paroxysmal positional vertigo (h-BPPV) with persistent geotropic direction changing positional nystagmus (DCPN).
Methods: One hundred thirty two patients diagnosed as the geotropic subtype of h-BPPV were analyzed retrospectively. Patients were classified into two groups: persistent h-BPPV (ph-BPPV) group which means h-BPPV showing persistent (＞1 minute) geotropic DCPN and short duration h-BPPV (sh-BPPV) group that means h-BPPV with short duration (≤1 minute) geotropic DCPN. We compared the clinical characteristics and treatment outcomes between the two groups.
Results: The study included 34 patients with ph-BPPV and 98 patients with sh-BPPV. There were no differences between the two groups in age, distribution of sex and the affected side. The ph-BPPV group had higher secondary BPPV preponderance and dizziness handicap index (DHI) score compared to the sh-BPPV group. The ph-BPPV group required higher number of canalith repositioning procedures (CRPs) until resolution and higher multiple/single CRP ratio than the sh-BPPV group. In addition, the ph-BPPV group showed longer duration until the remission of subjective symptoms (vertigo, dizziness) compared to the sh-BPPV group.
Conclusion: ph-BPPV was more frequently associated with secondary causes of BPPV and demonstrated higher DHI score, total number of CRP, and longer remission duration of subjective symptoms compared to sh-BPPV. This information may be helpful for clinicians in counseling and managing the patients with persistent geotropic DCPN h-BPPV.
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KEYWORD
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Benign paroxysmal positional vertigo, Direction-changing positional nystagmus, Geotropic nystagmus
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