Effect of the canalith repositioning procedure on subjective visual horizontal in patients with posterior canal benign paroxysmal positional vertigo.
CONCLUSIONS
Substantial numbers of patients with posterior canal benign paroxysmal positional vertigo (p-BPPV) have signs of utricular dysfunction at baseline. This improves after performing the canalith repositioning procedure.


OBJECTIVE
To evaluate the changes of subjective visual horizontal (SVH) in patients with p-BPPV before and after treatment with the canalith repositioning procedure.


METHODS
Twenty-six patients with p-BPPV were treated with the canalith repositioning procedure, Epley's maneuver, according to the affected side. Baseline SVH measurements were taken before performing the Dix-Hallpike maneuver and Epley's maneuver, for comparison with measurements taken just after Epley's maneuver, and 2 weeks after Epley's maneuver.


RESULTS
Among 26 patients with p-BPPV, 11 (42%) showed abnormal deviation of SVH at baseline. Just after performing Epley's maneuver, the number of patients who showed an abnormal deviation of SVH decreased significantly to 15% (4 of 26 patients; p < 0.05). Two weeks after performing Epley's maneuver, only two patients (8%) showed an abnormal deviation of SVH (p < 0.001).
Department of Otolaryngology, University of Tokyo, Japan. iwashin-tky@umin.ac.jp
Shinichi
S
Iwasaki
Yasuhiro
Y
Chihara
Munetaka
M
Ushio
Atsushi
A
Ochi
Toshihisa
T
Murofushi
Tatsuya
T
Yamasoba
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009949:Orientation / Q000502:physiology*; D010037:Otolithic Membrane / Q000503:physiopathology*; D026741:Physical Therapy Modalities; D004856:Postural Balance / Q000502:physiology*; D012444:Saccule and Utricle / Q000503:physiopathology*; D014717:Vertigo / Q000503:physiopathology* / Q000534:rehabilitation / Q000628:therapy*; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult