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Volume 22 (3); September 2023
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Review
Canal Conversion and Reentry of Otolith in Benign Paroxysmal Positional Vertigo
Jong Sei Kim, Minbum Kim
Res Vestib Sci. 2023;22(3):59-67.   Published online September 15, 2023
DOI: https://doi.org/10.21790/rvs.2023.22.3.59
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  • 54 Download
AbstractAbstract PDF
During the treatment process for benign paroxysmal positional vertigo (BPPV) using the canalith repositioning procedure, the otolith can inadvertently enter the semicircular canal instead of the utricle. Canal conversion refers to the situation where the otolith enters a different semicircular canal, while reentry occurs when the otolith returns to the same semicircular canal. The occurrence of a canal conversion can complicate the accurate diagnosis and treatment of BPPV, potentially leading to misdiagnosis and unsuccessful results in the canalith repositioning procedure. In this review, we aim to summarize the incidence, clinical features, and associated risk factors of canal conversion and reentries.
Original Article
Quantifying the Prevalence of Acute Vestibular Neuritis through Big Data Analysis
Chul Young Yoon, Seulgi Hong, Ji-Yun Park, Young Joon Seo
Res Vestib Sci. 2023;22(3):68-76.   Published online September 15, 2023
DOI: https://doi.org/10.21790/rvs.2023.22.3.68
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  • 46 Download
AbstractAbstract PDFSupplementary Material
Objectives
Big data analytics in healthcare research have gained momentum, offering unprecedented opportunities to investigate complex medical conditions like acute vestibular neuritis (AVN). However, an inappropriate definition can introduce bias and inaccuracies into prevalence estimation, making the results unreliable and hindering cross-study comparisons. The Health Insurance data in South Korea will be used to create a robust operational definition for AVN.
Methods
The study utilized the National Patients Sample dataset from the Health Insurance Review and Assessment Service (HIRA) of the Republic of Korea. The operational definition of AVN was defined using the HIRA data, which includes specific codes for diagnosis, testing, and medications. The revised categorization scheme for AVN was presented as case 1 through case 5, with criteria for each category.
Results
The optimal conditions are deemed to be those that encompass the outcomes of both case 5 and case 1-1, encompassing all conditions. The study also provided prevalence estimates for subgroups based on demographic factors (age, sex), and found a consistent pattern throughout all years, sex, and age.
Conclusions
The study analyzed the prevalence of AVN in case 1 and case 5, which were similar to the reference prevalence of 3.5 per 100,000 people reported in other countries. The study’s results are encouraging for several reasons, including the validity of the operational definitions used, and the agreement between the study’s prevalence estimates and the reference prevalence. The operational definition in statistics, in the context of big data, serves as a precise and standardized criterion.
Case Reports
A Case of Delayed Audiovestibulopathy after Posterior Circulation Ischemic Stroke
Hyun Su Lee, Eun Kyung Jeon, Dong Hwan Kwon, Tae Hoon Kong
Res Vestib Sci. 2023;22(3):77-82.   Published online September 15, 2023
DOI: https://doi.org/10.21790/rvs.2023.22.3.77
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  • 33 Download
AbstractAbstract PDF
Distinguishing central and peripheral causes of dizziness is vital. A case is presented where a 42-year-old man with a history of posterior circulation ischemic stroke developed acute unilateral vestibulopathy with hearing loss. Clinical examination revealed signs of vestibular dysfunction on the left side. Audiometry confirmed deafness on the left, but imaging ruled out new central issues. The patient was diagnosed with audiovestibulopathy and treated with steroids, antiviral agents, intratympanic injections, and hyperbaric oxygen therapy. Hearing loss persisted, but dizziness improved with vestibular rehabilitation. Poststroke patients should be closely monitored for peripheral complications. Further research should explore the benefits of antiplatelet therapy in vascular-related conditions, even without clear central lesions.
A Case of Patient with Bilateral Cochleovestibular Function Loss due to Infratentorial Superficial Siderosis
Gyuman Lee, Youngmin Mun, Dae Bo Shim
Res Vestib Sci. 2023;22(3):83-88.   Published online September 15, 2023
DOI: https://doi.org/10.21790/rvs.2023.22.3.83
Correction in: Res Vestib Sci 2023;22(4):137
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AbstractAbstract PDF
Superficial siderosis (SS) is a rare neurodegenerative condition characterized by hemosiderin deposition in the central nervous system, which sometimes leads to sensorineural hearing loss and vestibular dysfunction. This case report details the diagnosis and treatment of a 63-year-old female patient presenting with a yearlong history of postural instability and recent symptoms of sudden right-sided hearing loss and imbalance. Physical examination and imaging revealed bilateral deafness and infratentorial SS. Treatment, including medication, vestibular exercises, high-dose steroids, and hyperbaric oxygen therapy, led to a significant alleviation of dizziness but no improvement in hearing. This case emphasizes the need for clinicians to consider SS in patients presenting with sudden-onset hearing loss and dizziness, even without prior any medical history or trauma, to accurately identify the underlying cause.
A Rare Case of Isolated Infarcts of the Pons with Sudden Vertigo: Clinical Features and Imaging Findings
Dong Hwan Kwon, Eun kyung Jeon, Young Joon Seo
Res Vestib Sci. 2023;22(3):89-94.   Published online September 15, 2023
DOI: https://doi.org/10.21790/rvs.2023.22.3.89
  • 1,005 View
  • 33 Download
AbstractAbstract PDF
Isolated infarcts of the pons (IIP) are a rare subtype of ischemic stroke, accounting for less than 1% of all strokes. It refers to a specific type of ischemic stroke that occurs within the pons region of the brain. IIP can be associated with vertebrobasilar insufficiency in certain cases. This case report describes a 64-year-old female patient who presented with acute vertigo and spontaneous nystagmus to the lesion side, ultimately diagnosed with IIP in the posterior right side of pons. Tegmental pontine infarcts typically manifest as oblique small (lacunar) infarctions that are localized in the mediolateral tegmental area of the middle to upper pons. The patient’s symptoms resolved spontaneously, but a 2-mm infarct was confirmed by brain diffusion magnetic resonance imaging. This case highlights the distinctive symptoms associated with IIP and emphasizes the importance of careful neurological examination and advanced neuroimaging techniques for accurate diagnosis.
Video Report
A Case of Congenital Nystagmus Showing Reversed Optokinetic Nystagmus
Han Cheol Lee, Seungjoon Yang, Sung Huhn Kim, Seong Hoon Bae
Res Vestib Sci. 2023;22(3):95-96.   Published online September 15, 2023
DOI: https://doi.org/10.21790/rvs.2023.22.3.95
  • 1,042 View
  • 25 Download
PDFSupplementary Material

Res Vestib Sci : Research in Vestibular Science