Browsing by Author "Sepulveda, Valeria"

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    Benign Paroxysmal Positional Vertigo Secondary to Acute Unilateral Peripheral Vestibulopathy: Evaluation of Cardiovascular Risk Factors
    (2023) Waissbluth, Sofia; Becker, Javier; Sepulveda, Valeria; Iribarren, Javier; Garcia-Huidobro, Francisco
    BACKGROUND: Lindsay-Hemenway syndrome was first described as an acute unilateral peripheral vestibulopathy followed by positional vertigo. A vascular etiology was proposed. An association between cardiovascular risk factors and benign paroxysmal positional vertigo secondary to acute unilateral peripheral vestibulopathy has been described with contradictory evidence. The study aimed to evaluate the prevalence of cardiovascular risk factors in patients with benign paroxysmal positional vertigo secondary to acute unilateral peripheral vestibulopathy and analyze differences in prior history of benign paroxysmal positional vertigo, affected semicircular canals, and response to repositioning maneuvers between patients with idiopathic benign paroxysmal positional vertigo and secondary to acute unilateral peripheral vestibulopathy. METHODS: We performed a retrospective, descriptive study of all cases of benign paroxysmal positional vertigo between January/2017 and June/2020, with or without a history of acute unilateral peripheral vestibulopathy within the previous year. Cases secondary to trauma or otoneurological causes and acute unilateral peripheral vestibulopathy without confirmatory tests and cases with auditory symptoms were excluded. RESULTS: In total, 242 cases were obtained; 158 idiopathic benign paroxysmal positional vertigo and 84 secondary to acute unilateral peripheral vestibulopathy. No statistically significant differences were found in relation to age: 61.2 +/- 14.6 versus 62.4 +/- 16.2 years (P =.55), sex: female 78.5% versus 73.8% (P =.41), presence of cardiovascular risk factors: 52.5% versus 54.8% (P =.67), prior history of benign paroxysmal positional vertigo: 22.2% versus 27.7% (P =.43), affected semicircular canals (P =.16) or number of repositioning maneuvers (P =.57). CONCLUSION: Associations between age, cardiovascular risk factors, and benign paroxysmal positional vertigo secondary to acute unilateral peripheral vestibulopathy have been described with conflicting evidence. This is the first study to evaluate cardiovascular risk factors specifically for Lindsay-Hemenway syndrome, and we did not observe any differences between idiopathic benign paroxysmal positional vertigo cases and those secondary to acute unilateral peripheral vestibulopathy.
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    Caloric and video head impulse test dissociated results in dizzy patients
    (2022) Waissbluth, Sofia; Sepulveda, Valeria; Leung, Jai-Sen; Oyarzun, Javier
    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 Meniere's disease. DiscussionThe most common disorders with discordant results were Meniere'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.
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    Sudden sensorineural hearing loss: Recovery rates according to audiometric patterns
    (2022) Waissbluth, Sofia; Sepulveda, Valeria; Urzua, Pablo
    Purpose: The aim of this study was to evaluate the different audiometric patterns in sudden sensorineural hearing loss (SSNHL), assess recovery rates based on the initial pattern and also, analyse the impact on speech discrimination scores (SDS).