Caloric and video head impulse test dissociated results in dizzy patients
IntroductionWe are now able to detect abnormalities for any semicircular canal with the use of the video head impulse test (vHIT). Prior to the vHIT, the gold standard for unilateral canal paresis of the lateral canal was considered the caloric test. Clinical cases where the caloric test and vHIT ar...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-09-01
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| Series: | Frontiers in Neurology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fneur.2022.1000318/full |
| _version_ | 1818017252447879168 |
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| author | Sofia Waissbluth Valeria Sepúlveda Jai-Sen Leung Javier Oyarzún |
| author_facet | Sofia Waissbluth Valeria Sepúlveda Jai-Sen Leung Javier Oyarzún |
| author_sort | Sofia Waissbluth |
| collection | DOAJ |
| description | IntroductionWe are now able to detect abnormalities for any semicircular canal with the use of the video head impulse test (vHIT). Prior to the vHIT, the gold standard for unilateral canal paresis of the lateral canal was considered the caloric test. Clinical cases where the caloric test and vHIT are discordant are not uncommon.MethodsRetrospective study. All consecutive cases of dizziness seen from 11/2020 to 12/2021 for which the patient underwent both caloric and vHIT tests performed within 10 days, were reviewed. Patients with discordant results were included. We evaluated the caloric response, vHIT gains for all canals and saccades, with and without gain abnormalities.ResultsWe included 74 cases of dizziness with dissociated results. The most common finding was a normal caloric response with abnormal vHIT results (60.8%); the main abnormal finding on vHIT was the presence of saccades. In this group, 37.7% of patients had normal gains and refixation saccades. In addition, the most found low gain was for the posterior canal. The main diagnosis in this group was vestibular migraine. For the group with unilateral caloric paresis and normal vHIT gain in the lateral canal, the main diagnosis was Ménière's disease.DiscussionThe most common disorders with discordant results were Ménière's disease and vestibular migraine. The caloric test and vHIT are complementary and combining both tests provide greater clinical information. Further research is needed to understand refixation saccades with normal gains. |
| first_indexed | 2024-04-14T07:24:47Z |
| format | Article |
| id | doaj.art-a6dacddfa776485ba445c3b5b71cb9c5 |
| institution | Directory Open Access Journal |
| issn | 1664-2295 |
| language | English |
| last_indexed | 2024-04-14T07:24:47Z |
| publishDate | 2022-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neurology |
| spelling | doaj.art-a6dacddfa776485ba445c3b5b71cb9c52022-12-22T02:06:03ZengFrontiers Media S.A.Frontiers in Neurology1664-22952022-09-011310.3389/fneur.2022.10003181000318Caloric and video head impulse test dissociated results in dizzy patientsSofia WaissbluthValeria SepúlvedaJai-Sen LeungJavier OyarzúnIntroductionWe are now able to detect abnormalities for any semicircular canal with the use of the video head impulse test (vHIT). Prior to the vHIT, the gold standard for unilateral canal paresis of the lateral canal was considered the caloric test. Clinical cases where the caloric test and vHIT are discordant are not uncommon.MethodsRetrospective study. All consecutive cases of dizziness seen from 11/2020 to 12/2021 for which the patient underwent both caloric and vHIT tests performed within 10 days, were reviewed. Patients with discordant results were included. We evaluated the caloric response, vHIT gains for all canals and saccades, with and without gain abnormalities.ResultsWe included 74 cases of dizziness with dissociated results. The most common finding was a normal caloric response with abnormal vHIT results (60.8%); the main abnormal finding on vHIT was the presence of saccades. In this group, 37.7% of patients had normal gains and refixation saccades. In addition, the most found low gain was for the posterior canal. The main diagnosis in this group was vestibular migraine. For the group with unilateral caloric paresis and normal vHIT gain in the lateral canal, the main diagnosis was Ménière's disease.DiscussionThe most common disorders with discordant results were Ménière's disease and vestibular migraine. The caloric test and vHIT are complementary and combining both tests provide greater clinical information. Further research is needed to understand refixation saccades with normal gains.https://www.frontiersin.org/articles/10.3389/fneur.2022.1000318/fullvertigodizzinesscaloric testvideo head impulse testvestibular disease |
| spellingShingle | Sofia Waissbluth Valeria Sepúlveda Jai-Sen Leung Javier Oyarzún Caloric and video head impulse test dissociated results in dizzy patients Frontiers in Neurology vertigo dizziness caloric test video head impulse test vestibular disease |
| title | Caloric and video head impulse test dissociated results in dizzy patients |
| title_full | Caloric and video head impulse test dissociated results in dizzy patients |
| title_fullStr | Caloric and video head impulse test dissociated results in dizzy patients |
| title_full_unstemmed | Caloric and video head impulse test dissociated results in dizzy patients |
| title_short | Caloric and video head impulse test dissociated results in dizzy patients |
| title_sort | caloric and video head impulse test dissociated results in dizzy patients |
| topic | vertigo dizziness caloric test video head impulse test vestibular disease |
| url | https://www.frontiersin.org/articles/10.3389/fneur.2022.1000318/full |
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