Video-head impulse test em pacientes com migrânea vestibular
Data
2015-12-18
Tipo
Dissertação de mestrado
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Resumo
Introdução: a migrânea vestibular (MV) como entidade específica foi descrita em 1999 e sua fisiopatologia ainda não está bem estabelecida. Paralelamente às pesquisas que tentam compreender melhor a MV, houve um aprimoramento de técnicas de análise da função vestibular na prática clínica. O vídeo head impulse test (vHIT) é uma das mais recentes ferramentas para avaliar a função vestibular, medindo o ganho do reflexo vestíbulo-ocular. Objetivo: Avaliar a função vestibular de pacientes com MV por meio do vHIT. Método: estudo transversal do tipo casocontrole com amostras homogêneas em gênero e idade de pacientes com MV pelos critérios da Bárány Society / International Headache Society de 2012-2013 submetidos a vHIT no período intercrise de sua doença. Resultados: foram avaliados 31 pacientes com MV, com predomínio do gênero feminino (90,3%) e idade média de 41 anos. A função vestibular medida pelo valor do ganho foi normal nos dois grupos de paciente. Os valores de ganho para canais horizontais foram iguais entre os dois grupos, porém os valores de ganho para canais verticais foram maiores no grupo com MV (p<0,05). Os pacientes com MV apresentaram mais tontura durante a realização do vHIT que os indivíduos controle (p<0,001). Conclusões: Pacientes com MV apresentam função vestibular normal no período intercrises quando avaliados por vHIT. Os canais verticais, no entanto, apresentam ganhos mais elevados que os ganhos de indivíduos controle. Mais pacientes com MV sentem tontura durante a realização de vHIT do que indivíduos controle.
Introduction: vestibular migraine (VM) as an entity was described in 1999 and its pathophysiology is still not well established. Simoutaneosly with researches trying to better understand VM, it has been an improvement in vestibular function assessment. The video-head impulse test (vHIT) is one of the latest tools to evaluate vestibular function, measuring its vestibular-ocular reflex gain. Objective: to evaluate vestibular function of VM patients using vHIT. Method: cross-sectional case-control study homogeneous by age and gender with VM patients according to the 2012-2013 Barany Society / International Headache Society diagnostic criteria submitted to vHIT during intercrisis period. Results: it were evaluated 31 VM patients with a predominantly female group (90.3%) and mean age of 41 years old. Vestibular function was normal in both patient and control groups. Gain values for horizontal channels were similar between the two groups, but gain values for vertical channels were higher in the group with VM (p<0.05). Patients with VM felt more dizziness while performing the vHIT than control subjects (p<0.001). Conclusions: Patients with VM present normal vestibular function during intercrisis period when evaluated by vHIT. Vertical channels, however, have higher gains in patients with VM than in control subjects. VM patients feel dizziness more often while conducting vHIT.
Introduction: vestibular migraine (VM) as an entity was described in 1999 and its pathophysiology is still not well established. Simoutaneosly with researches trying to better understand VM, it has been an improvement in vestibular function assessment. The video-head impulse test (vHIT) is one of the latest tools to evaluate vestibular function, measuring its vestibular-ocular reflex gain. Objective: to evaluate vestibular function of VM patients using vHIT. Method: cross-sectional case-control study homogeneous by age and gender with VM patients according to the 2012-2013 Barany Society / International Headache Society diagnostic criteria submitted to vHIT during intercrisis period. Results: it were evaluated 31 VM patients with a predominantly female group (90.3%) and mean age of 41 years old. Vestibular function was normal in both patient and control groups. Gain values for horizontal channels were similar between the two groups, but gain values for vertical channels were higher in the group with VM (p<0.05). Patients with VM felt more dizziness while performing the vHIT than control subjects (p<0.001). Conclusions: Patients with VM present normal vestibular function during intercrisis period when evaluated by vHIT. Vertical channels, however, have higher gains in patients with VM than in control subjects. VM patients feel dizziness more often while conducting vHIT.
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Citação
SALMITO, Marcio Cavalcante. Video-head impulse test em pacientes com migrânea vestibular. 2015. 52 f. Dissertação (Mestrado em Otorrinolaringologia) - Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), São Paulo, 2015.