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Otolith Function Tests in Patients with Orthostatic Dizziness
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Su Hyun Ahn, Eun Ju Jeon, Yong Soo Park, Dong Hyun Kim, Inn Chul Nam
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Res Vestib Sci. 2015;14(1):15-20.
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 Abstract
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- Background
and Objectives: Orthostatic dizziness (OD) is defined as when
dizziness is provoked by standing up from a supine or sitting position. It is usually
considered as being associated with orthostatic hypotension (OH). On the other
hand, it is recently suggested that otolith organ dysfunction and impaired
vestibulosympathetic reflex may account for development of OH and OD.
Vestibular evoked myogenic potential (VEMP) and subjective visual vertical and
horizontal tests (SVV/SVH) are tools for detecting otolith organ dysfunction. We
assessed cervical VEMP (cVEMP) and SVV/SVH test results in the patients with
OD to evaluate the relationship between OD and otolith organ function. Materials
and Methods: Three hundred-eighty-seven patients who visited dizziness clinic
were enrolled in this study. Seventy-three patients presented with OD (i.e., group
O), while 314 patients did not present OD (i.e., group N). Vestibular function
tests including cVEMP and SVV/SVH were performed. Results: cVEMP showed
abnormal response in 47.9% of group O and 60.2% of group N. Abnormal SVV
was found in 35.6% of group O and 31.5% of group N. Abnormal SVH was
highly found in both group O and group N (30.1%, 27.1%). Conclusion: The
values of SVV/SVH and cVEMP abnormality from both groups were not
significantly different between the groups O and N. This finding suggests that
otolithic function may not be related with OD.
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Multicenter Study on the Clinician’s Diagnostic and Therapeutic Approaches for Benign Paroxysmal Positional Vertigo in Korea
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Eun Ju Jeon, Won Ho Chung, Jeong Hwan Choi, Eui Cheol Nam, Hong Ju Park, Jong Dae Lee, Won Sang Lee, Kyu Sung Kim, Eui Kyung Goh, Ja Won Koo, Min Bum Kim, Min Beom Kim, Se Hyung Kim, Young Jin Kim, Chang Hee Kim, Sung Il Nam, Seog Kyun Mun, Ga Young Park, Sang Yoo Park, Shi Nae Park, Chang Hoon Bae, Sung Hyun Boo, Myung Whan Suh, Jae Hyun Seo, Eun Jin Son, Jae Jun Song, Jae Jin Song, Joong Wook Shin, Dae Bo Shim, Seong Ki Ahn, Hye Youn Youm, Shin Young Yoo, Dong Hee Lee, Seung Hwan Lee, Chang Ho Lee, Hyun Seok Lee, Hwan Ho Lee, Hyo Jeong Lee, Yun Hoon Choung, Seung Hyo Choi, Jee Sun Choi, Seok Min Hong, Sung Kwang Hong
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Res Vestib Sci. 2013;12(3):79-92.
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Abstract
- Background and Objectives: It is necessary to establish the most efficient diagnostic and therapeutic method for benign paroxysmal positional vertigo (BPPV), which is appropriate for Korean healthcare system. We aimed to evaluate current state of Korean clinician’s diagnostic and therapeutic approaches for BPPV. Materials and Methods: A 16-item survey was emailed to the members of dizziness department of Otology Research Interest Group in the Korean Otologic Society (n=68). 43 were returned and analyzed. Results: All respondents (100%) used Dix-Hallpike test as a diagnostic tool for vertical canal-BPPV. Supine roll test was used for diagnosing lateral canal BPPV in nearly all the respondents (97.7%). Epley maneuver was chosen as otolith repositioning maneuver (ORM) for posterior canal BPPV in all respondents and barbecue rotation (BBQ) was used for treating lateral canal BPPV with geotropic nystagmus in 95.3% of respondents. Extreme variation was noted for therapeutic approach of lateral canal BPPV with ageotropic nystagmus BBQ, with 4 kinds of ORM and adjunctive measures to liberate otolith from cupula, while BBQ was again the most commonly used ORM (76.7%). Conclusion: The development of practical and efficient ORM for lateral canal BPPV with ageotropic nystagmus is necessary.
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Effects of Meteorological Factors on the Onset of Vestibular Neuritis
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Eun Ju Jeon, Dong Hyun Kim
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Res Vestib Sci. 2012;11(4):116-122.
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Abstract
- Background and Objectives: The objective of this study was to evaluate the effect of meteorological factors on the onset of vestibular neuritis. Materials and Methods: Meteorological data from 2004 to 2009 were obtained from the web-based ‘Monthly Weather Reports of the Meteorological Administration’ database. Patients with vestibular neuritis who visited Incheon St. Mary’s Hospital during this same period and presented the precise day on which the symptoms appeared were included in this study involving a retrospective chart review. Twelve meteorological factors were analyzed between the days when vestibular neuritis onset was observed and the days when vestibular neuritis did not occur. Time lags (D-1-D-7) which mean 1-7 days before the onset were included to assess a possible delayed meteorological effect in relation to the onset of vestibular neuritis. Seasonal incidence of vestibular neuritis and a relationship with seasonal patterns of weather parameters were evaluated. Results: Mean values for the meteorological parameters of the days when vestibular neuritis occurred were not significantly different from the days on which vestibular neuritis onset was not observed. At time lag of 3-5 days, mean and maximal wind velocities were significantly higher for the days when vestibular neuritis occurred than the days without vestibular neuritis onset. The incidence of vestibular neuritis was highest in spring, when the wind velocity was higher compared to other seasons. Conclusion: Wind speed and the spring season showed significant relationships with vestibular neuritis occurrence.
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