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Research Article

Changes of video head impulse test results in lateral semicircular canal plane by different peak head velocities in patients with vestibular neuritis

Tae Su KimDepartment of Otolaryngology, Kangwon National University, Chuncheon, Republic of Korea;

,

Hyun Woo LimDepartment of Otolaryngology, Asan Medical Center, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Republic of Korea;

,

Chan Joo YangDepartment of Otorhinolaryngology-Head and Neck Surgery, Hanil General Hospital, Seoul, Republic of Korea;

,

Yong Han KimDepartment of Otolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan, Seoul, Republic of Korea;

,

Woo Ri ChoiDepartment of Otolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan, Seoul, Republic of Korea;

,

Yeh Ree KimDepartment of Otolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan, Seoul, Republic of Korea;

,

Jun Woo ParkDepartment of Otolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan, Seoul, Republic of Korea;

,

Byung Chul KangDepartment of Otorhinolaryngology-Head and Neck Surgery, Ulsan University Hospital, Ulsan, Republic of Korea

&

Hong Ju ParkDepartment of Otolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan, Seoul, Republic of Korea; Correspondence[email protected]

Abstract

Background: The peak head velocity influences on the video head impulse test (vHIT) results, but it has been not known how much the difference is.

Aims: To evaluate the clinical evidence for the superiority of high-velocity compared to low-velocity vHIT.

Material and methods: vHIT was performed in 30 patients with vestibular neuritis using two peak head velocities (mean 80 vs. 240°/s). vHIT gains and parameters of corrective saccades (CSs) were compared. A vHIT gain of ≤0.8 or a peak CS velocity of ≥100°/s was considered pathologic.

Results: The vHIT gains were significantly lower (mean 0.5 vs. 0.6), and GA was larger (35 vs. 25%) at high-velocity vHIT, compared to low-velocity vHIT. CSs were significantly more frequent (100 vs. 80%) and peak CS velocities were larger (252 vs. 112°/s) at high-velocity vHIT. The abnormal rates based on vHIT gains were higher (90% vs. 73%) and CSs occurred more frequently (100% vs. 80%) at high-velocity vHIT. The abnormal rates based on the peak CS velocity were significantly higher at high-velocity vHIT (100% vs. 57%).

Conclusion: High-velocity vHIT is superior to low-velocity vHIT with a difference of 17–20% based on pathologic vHIT gains and presence of CSs.

Chinese abstract

背景：峰值磁头速度对视频磁头脉冲测试（vHIT）结果有影响, 但差异到底有多大还是未知数。

目的：评估相较于低速vHIT, 高速vHIT的优越性的临床证据。

材料和方法：使用两个峰值磁头速度（平均值80°/ s相对于240°/ s）对30名前庭神经炎患者进行vHIT检测。比较vHIT增益和修正扫视参数（CS）。 vHIT增益≤0.8或峰值CS速度≥100°/ s被认为是病理性的。

结果：与低速vHIT相比, 在高速vHIT时, vHIT增益明显较低（平均值为0.5对0.6）, GA较大（35%对25％）。在高速vHIT时, CS更频繁（100% 对80％）, 峰值CS速度更大（252°/ s对112°/ s）。基于vHIT增益, 异常率在高速vHIT时较高（90％对73％）, 而CS更频繁（100％对80％）。基于峰值CS速度, 异常率在高速度vHIT时显著更高（100％对57％）。

结论：基于病理性vHIT获益和CSs的存在, 高速vHIT优于低速vHIT, 差异为17-20％。

Keywords:

Disclosure statement

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.

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