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Comparison of vestibular evoked myogenic potentials between low and high tone idiopathic sudden sensorineural hearing loss
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Sang-Wook Park, Sang Yun Lee, Somi Ryu, Jung Woo Lee, Chae Dong Yim, Dong Gu Hur, Seong-Ki Ahn
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Res Vestib Sci. 2024;23(1):11-15. Published online March 15, 2024
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DOI: https://doi.org/10.21790/rvs.2024.001
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 Abstract
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- Objectives
Vestibular evoked myogenic potentials (VEMP) have been reported to be useful in evaluating not only vestibular function but also the prognosis of idiopathic sudden sensorineural hearing loss (ISSNHL) patients. Even though low frequency, high frequency, and all frequency-involved ISSNHL groups tend to show varied clinical characteristics, there is a lack of data using VEMP results to analyze these subgroups. We investigated if the VEMP test is a valuable tool to predict recovery from hearing loss in association with different frequencies.
Methods
A total of 26 ISSNHL patients were divided into three different groups impaired with low tone (ascending type), high tone (descending type), and all tones (flat type) based on the initial audiograms. Each group included five, 10, and 11 patents, respectively, and their VEMP results were compared between the three subgroups.
Results
Abnormal VEMP results were found in five of the total 26 ISSNHL patients (19.2%). Two (40.0%), one (10.0%), and two (18.1%) patients of low tone, high tone, and all tone hearing loss groups, respectively, showed abnormal VEMP results. However, there was no statistically significant difference between the three groups.
Conclusions
Even though VEMP is known as a valuable tool for predicting the prognosis of ISSNHL patients, it does not seem to reflect frequency-sensitive aspects of ISSNHL.
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Study on Platelet Indices in Benign Paroxysmal Positional Vertigo
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Byeong Min Lee, Chae Dong Yim, Dong Gu Hur, Seong-Ki Ahn
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Res Vestib Sci. 2021;20(4):141-146. Published online December 15, 2021
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DOI: https://doi.org/10.21790/rvs.2021.20.4.141
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Abstract
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- Objectives
Benign paroxysmal positional vertigo (BPPV) is one of the most common causes of dizziness. Even though the etiology of BPPV has been widely studied, the exact mechanism remains still unclear. One of the possible factors explaining the pathophysiology of BPPV is ischemia of vestibule. In the present study, we have focused on the platelet indices including mean platelet volume (MPV), platelet distribution width (PDW), and platelet crit (PCT) to assess a risk of vestibule ischemia causing BPPV.
Methods
From January 2021 to March 2021, a retrospective review was performed on 39 patients diagnosed with BPPV through vestibular nystagmography. For each platelet indices, a comparative analysis was conducted between the patient group and control group.
Results
There were no significant differences when the platelet, MPV, PDW, and PCT values were compared between the study and control group. Rather, the control group showed higher PDW value than the study group.
Conclusions
Ischemia of vestibule is one of the well-known causes of BPPV, but the current study showed that BPPV cannot be explained by the vestibule ischemia itself. Further studies are needed to identify the potential of ischemia regarding BPPV by approaching with other methods with a large study group.
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양성돌발성두위현훈에서 혈소판 지표의 역할에 대한 연구.
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Byeong Min Lee, Chae Dong Yim, Dong Gu Hur, Seong-Ki Ahn
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Received October 29, 2021 Accepted November 22, 2021 Published online November 22, 2021
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[Accepted]
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Abstract
- Objective: Benign paroxysmal positional vertigo (BPPV) is one of the most common causes of dizziness. Even though the etiology of BPPV has been widely studied, the exact mechanism remains still unclear. One of the possible factors explaining the pathophysiology of BPPV is ischemia of vestibule. In the present study, we have focused on the platelet (PLT) indices including mean platelet volume (MPV), platelet distribution width (PDW), and platelet crit (PCT) to assess a risk of vestibule ischemia causing BPPV.
Methods
From January 2021 to March 2021, a retrospective review was performed on 39 patients diagnosed with BPPV through vestibular nystagmography. For each PLT indices, a comparative analysis was conducted between the patient group and control group.
Results
In BPPV patients, there were no significant differences when the PLT, MPV, PDW and PCT values were compared between the study and control group. Rather, the control group showed higher PDW value than the study group.
Conclusion
Ischemia of vestibule is one of the well-known causes of BPPV, but the current study showed that BPPV cannot be explained by the vestibule ischemia itself. Further studies are needed to identify the potential of ischemia regarding BPPV by approaching with other methods with a large study group.
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The Periodic Fluctuation of Intra-Annual Distribution of Benign Paroxysmal Positional Vertigo and Meteorological Parameters
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Chae Dong Yim, Ki Ju Cho, Hyun Jin Lee, Dong Gu Hur, Rock-Bum Kim, Seong-Ki Ahn
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Res Vestib Sci. 2020;19(3):99-103. Published online September 15, 2020
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DOI: https://doi.org/10.21790/rvs.2020.19.3.99
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Abstract
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- Objectives
The influence of specific meteorological conditions, such as solar radiation quantity, duration of sunshine, and their covariation on the incidence of benign paroxysmal positional vertigo (BPPV) has been rarely investigated. Aiming at better predictions of the monthly variation of BPPV, we investigated variations in the monthly incidence of BPPV patients and meteorological parameters.
Methods
A total of 2,111 patients who had been diagnosed with BPPV at one institution were analyzed retrospectively. Monthly counts of BPPV patients were analyzed for incidence distributions throughout the 5 years. The relationship between intra-annual distribution of BPPV and meteorological parameters was compared by the time series analysis.
Results
The lowest monthly incidence of BPPV patients was found in September and the highest monthly incidence was found in December. Statistically, as a result of the time series analysis, a periodic fluctuation of both quantity of solar radiation (p=0.004) and percentage of sunshine duration (p=0.002) was identified, but a periodic fluctuation of both number of BPPV patients (p=0.316) and sunshine duration (p=0.057) was not identified.
Conclusions
Unlike previous studies, the results of time series analysis did not confirm that there is a periodic fluctuation in the incidence of BPPV patients. The incidence of BPPV may be more affected by other factors than by meteorological parameters.
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Arnold-Chiari Type 1 Malformation Mimicking Benign Paroxysmal Positional Vertigo
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Young Chul Kim, Chae Dong Yim, Hyun Jin Lee, Dong Gu Hur, Seong Ki Ahn
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Res Vestib Sci. 2019;18(3):87-90. Published online September 15, 2019
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DOI: https://doi.org/10.21790/rvs.2019.18.3.87
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Abstract
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- Arnold-Chiari malformation type 1 is a congenital disease characterized by herniation of the cerebellar tonsils through the foramen magnum. Most common clinical symptom is pain, including occipital headache and neck pain, upper limb pain exacerbated by physical activity or valsalva maneuvers. Various otoneurological manifestations also occur in patients with the disease, which has usually associated with dizziness, vomiting, dysphagia, poor hand coordination, unsteady gait, numbness. Patients with Arnold-Chiari malformation may develop vertigo after spending some time with their head inclined on their trunk. Positional and down-beating nystagmus are common forms of nystagmus in them. We experienced a 12-year-old female who presented complaining of vertigo related to changes in head position which was initially misdiagnosed as a benign paroxysmal positional vertigo.
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Incidence of Progression into Ménière Disease from Idiopathic Sudden Sensorineural Hearing Loss: Midterm Follow-up Study
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Byeong Min Lee, Jin Hyun Seo, Hyun Woo Park, Hyun Jin Lee, Dong Gu Hur, Seong Ki Ahn
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Res Vestib Sci. 2018;17(3):95-101. Published online September 18, 2018
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DOI: https://doi.org/10.21790/rvs.2018.17.3.95
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Abstract
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- Objectives
Ménière disease is a clinical syndrome characterized by the four major symptoms of episodic vertigo, sensorineural hearing loss, tinnitus, and aural fullness. Sensorineural hearing loss, especially low frequency, is the characteristic type of audiogram in Ménière's disease. However, it is difficult to distinguish idiopathic sudden sensorineural hearing loss (ISSNHL) with vertigo from the first attack of Ménière disease. The purpose of this study was to investigate the incidence of progression into Ménière Disease from low frequency ISSNHL.
Methods
Two hundred eighty-three patients were included in this study. We classified the patients with ISSNHL according to the hearing loss in audiogram and analyzed how many of them actually progressed to Ménière disease based on diagnosis criteria.
Results
Among the 240 patients, 37.1% (89 patients) were confirmed low frequency ISSNHL and 14.6% (13 patients) of them were diagnosed with Meniere disease.
Conclusions
This study showed that the progression from low frequency ISSNHL to Ménière disease was higher than other frequency ISSNHL, as in other studies.
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Long-Term Results of CyberKnife Radiosurgery for Vestibular Schwannoma
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Ho Joong Lee, Chae Dong Yim, Hyun Woo Park, Dong Gu Hur, Ho Jin Jeong, Seong-Ki Ahn
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Res Vestib Sci. 2017;16(1):23-28. Published online March 15, 2017
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DOI: https://doi.org/10.21790/rvs.2017.16.1.23
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Abstract
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- Objective: Since the 2000s, CyberKnife radiosurgery (CKRS) is either a primary or an adjunct management approach used to treat patients with vestibular schwannoma (VS). The goals of CKRS are prevention of tumor growth, preservation of cranial nerve function and prevention of new neurologic deficiencies. The aim of this study was to assess the efficacy and safety of CKRS, in terms of tumor control, hearing preservation, and complications.
Methods
Forty patients with VS underwent CKRS as a treatment modality for from January 2010 to February 2016. The long term results of 32 patients were evaluated who received CKRS as primary treatment. 8 patients presented with previously performed surgical resection. Information related to clinical history, Brain MRI and outcomes of patients with VS collected retrospectively by reviewing patient’s chart and telephone survey.
Results
The mean tumor volume was 3.3 cm3 and the mean follow-up was 41 months. The most recent follow-up showed that tumor size decreased in 17 patients (42.5%), displayed no change in 19 patients (47.5%), and increased in 4 patients (10%). Progression-free survival rates after CKRS at 1, 3, and 5 years were 95%, 90%, and 90%. After CKRS, 13 patients experienced hearing degradation. The overall rate of preservation of serviceable hearing at the long-term follow-up was 60%. Vertigo, ataxia, and headache were improved after CKRS compared with pretreated status. But, facial weakness, trigeminal nerve neuropathy, and tinnitus were worsen.
Conclusion
CKRS provide an excellent tumor control rate and a comparable hearing preservation rate in VS patients. Also CKRS is associated with low rate of cranial neuropathy, other complications.
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Correlation between Rotating Chair Test and Dizziness Handicap Inventory in Patients with Acute Unilateral Vestibular Neuritis
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Hyeong Joo Lee, Jin Yong Kim, Dong Gu Hur, Seong Ki Ahn
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Res Vestib Sci. 2016;15(2):51-54. Published online June 15, 2016
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Abstract
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- OBJECTIVE: Vestibular neuritis (VN) is one of the most common causes of acute spontaneous vertigo. However, such dizziness symptoms in patients with VN vary among patients, and various methods are used to evaluate subjective vestibular symptoms following attack of VN. Studies on correlation between subjective vestibular symptom changes and result of rotation chair test after vestibular rehabilitation therapy (VRT) have not been reported.
Therefore, we compared change of dizziness handicap inventory (DHI) and results of rotation chair test in patients with VN between attack and 3 month later following VRT.
METHODS
Forty-seven patients were included in this study.
In patients with VN, DHI and rotation chair test were performed at the time of VN attack and recovery time of 3 months after VN attack.
RESULTS
In general, the DHI score and the percentage of directional preponderance (DP) in a rotation chair test performed on patients with VN have all decreased. However, the changes in these results were not statistically significant. DP% difference and DHI score were compared to each other among patients with VN and showed no relational significance to each other (r=0.326).
CONCLUSION
The degree of improvement in a rotation chair test done on patients with VN did not reflect the severity of improvement for symptom like dizziness.
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