Characteristics of Subjective Visual Vertical(Horizontal)in Benign Paroxysmal Positional Vertigo
YANG Cuixia
CAI Haiyan
DU Yi
WANG Yu
XU Zhengyan
WANG Qian
LIU Xingjian
REN Lili
DING Jinhong
WU Ziming
Abstract：Objective To report normal values of subjective visual vertical/horizontal(SVV/SVH)and its value in clinical evaluation of otolith function in patients with paroxysmal benign paroxysmal positional vertigo(BPPV).Methods Patients diagnosed with primary BPPV from September 2023 to December 2023 at Chinese PLA General Hospital(n=60)were included as the study group,and 30 healthy volunteers without vertigo of Chinese PLA General Hospital and People's Hospital of Ningxia Hui Autonomous Region were recruited from September 2023 to May 2024 as the control group.Patients were grouped based on affected side and age.SVV and SVH were tested at head median(0°),right 45°,right 75°,left 45° and left 75°.SVV,SVH mean and variance were compared among groups.Results At the onset of BPPV,SVV tilted to the lesion side.SVH tilted clockwise(positive)in right side BPPV and counterclockwise(negative)in left side BPPV.SVH showed greater between-group difference than SVV.Older patients were more likely to show greater variance when tilting to the affected side,more so at 75° than at 45°.Conclusion SVV and SVH deviation angles can vary in the healthy individuals at different head positions,and each laboratory should establish their own normal value range.SVV and SVH tests can help locate the lesion side in BPPV.Variance is an important parameter in SVV,SVH examination.SVV,SVH have certain clinical significance for evaluation of otolith organ function,and is expected to be added to the routine vestibular function examination sequence.
Keywords：subjective visual verticalsubjective visual horizontalbenign paroxysmal positional vertigovestibular function test
Publication Date：2025-02-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 16-21 )