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Lateral Medullary Infarction with Ipsilesional Gaze-Evoked and Head-Shaking Nystagmus
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Taesuk Kyung, Minbum Kim
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Res Vestib Sci. 2014;13(4):114-116.
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 Abstract
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- For differential diagnosis between vestibular neuritis and lateral medullary
infarction with similar clinical features, bedside examination of nystagmus is
important. We report a 45-year-old male who presented with acute vertigo for
two days. He showed spontaneous right-beating nystagmus. However, left-beating
nystagmus was evoked during bilateral horizontal gaze and by horizontal head
oscillation. Brain MRI revealed an acute infarction in the left lateral medulla.
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Clinical Characteristics of Benign Paroxysmal Positional Vertigo of the Anterior Semicircular Canal
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Minbum Kim
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Res Vestib Sci. 2013;12(2):54-57.
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Abstract
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- Background and Objectives: The aim of this study is to investigate the characteristics of anterior semicircular canal benign paroxysmal positional vertigo (BPPV). Materials and Methods: This is a retrospective chart review of 1,150 patients who were diagnosed with BPPV at an ENT special hospital. We investigated a number of canalith repositioning procedure (CRP), canal switch and a history of recurrence or head trauma. Results: Anterior semicircular canal BPPV was observed in 41 (3.5%) patients. The average number of CRPs in patients with anterior semicircular canal BPPV was 2.19, which was higher than 1.60 in those with posterior semicircular canal BPPV (p<0.0001). Canal conversion from anterior to posterior semicircular canal was found in 5 (12.1%) patients during treatment. The average number of CRPs in conversion cases was 4, which was higher than 1.94 in non‐conversion cases (p=0.001). Conclusion: More CRPs were necessary for the treatment of anterior semicircular canal BPPV than posterior semicircular canal BPPV. Canal switch could be considered as a factor to prevent a successful treatment.
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An Atypical Case of Benign Paroxysmal Positional Vertigo of the Anterior Semicircular Canal
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Minbum Kim, Hyun Su Kim, Hee Nam Kim
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Res Vestib Sci. 2011;10(3):100-102.
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Abstract
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- Benign paroxysmal positional vertigo (BPPV) of anterior semicircular canal (ASC) is the rarest variant of BPPV, which is thought to be due to the anatomically superior position of ASC during most activities. This type of BPPV is currently diagnosed by detecting positional down-beating nystagmus in the Dix-Hallpike test. A 62-year-old female presented with positional vertigo, especially when sitting up. No nystagmus was induced by both Dix-Hallpike tests, however, positional down-beating nystagmus was observed with the left torsional component when sitting up from both Dix-Hallpike positions and supine position. After the reverse Epley maneuver, up-beating nystagmus was newly observed in the left Dix-Hallpike test, which was compatible with BPPV of the left posterior semicircular canal. This patient was thought to suffer from canalithiasis of the left ASC.
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