Residual dizziness after successful treatment of idiopathic benign paroxysmal positional vertigo originates from persistent utricular dysfunction

Abstract

Objective: We used ocular vestibular evoked myogenic potentials to investigate the relationship between residual dizziness and utricular function following the canalith repositioning procedure for benign paroxysmal positional vertigo.

Methods: Ocular vestibular evoked myogenic potentials were measured in 44 patients (40 included in analyses, four excluded) with successful results from the canalith repositioning procedure. The patients were examined before treatment and again one week after treatment. We analyzed how various general factors and ocular vestibular evoked myogenic potentials related to residual dizziness.

Results: Residual dizziness was not related to gender, affected side, age, duration of symptoms, recurrence, or the results of the initial ocular vestibular evoked myogenic potential test (p > .05). However, residual dizziness was significantly associated with the results of the second ocular vestibular evoked myogenic potential test (p = .007).

Conclusions: Residual dizziness after a successful canalith repositioning procedure may be caused by persistent utricular dysfunction.

Chinese abstract

目的：我们运用眼前庭诱发的肌源性电位来调查良性阵发性位置性眩晕术后残留头晕与椭圆囊功能的关系。

方法：对44例成功接受了耳石重建定位手术的患者（40例包括在分析中, 4例排除在外）进行了眼前庭诱发的肌源性电位测量。治疗前和治疗后一周对患者进行了检查。我们分析了各种一般因素和眼前庭诱发的肌原性电位与残余头晕有什么关系。

结果：残余眩晕与性别、病侧、年龄、症状持续时间、复发或始发眼前庭诱发肌原性电位的试验结果无关（p> 0.05）。然而, 残余头晕与次生眼前庭诱发肌原性电位的试验结果显著相关（p = .007）。

结论：成功的耳石重新定位手术后的残余头晕可能由持续性的椭圆囊功能障碍引起。

Keywords:

• Residual dizziness
• utricle
• oVEMP
• benign paroxysmal positional vertigo
• canalith repositioning procedure

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This study was partly supported by a Grant-in-Aid for Research on Intractable Vestibular Disorder from the Japan Agency of Medical Research and Development.