Ressonância magnética de 3.0 Tesla na Doenca de Ménière

• Ano de defesa: 2016
• Autor(a) principal: Sumi, Karina Cavalcanti [UNIFESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• dARK ID: ark:/48912/001300001gr2t
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
• Palavras-chave em Português: Dizziness; Meniere's disease; Magnetic resonance imaging; Tontura; Doença de Menière; Ressonância magnética
• Link de acesso: https://sucupira.capes.gov.br/sucupira/public/consultas/coleta/trabalhoConclusao/viewTrabalhoConclusao.jsf?popup=true&id_trabalho=3793936; http://repositorio.unifesp.br/handle/11600/46665

Introduction: Meniere's disease (MD) is an inner ear disease, with the highest prevalence between the 4th and 6th decades of life, clinically characterized by recurrent attacks of vertigo accompanied by sensorineural hearing loss, tinnitus and aural fullness. Magnetic resonance imaging (MRI) of 3.0 Tesla, represents a technological breakthrough for imaging and has been considered a promising tool to identify MD. Objective: The objective of this study was to identify, according to 3.0 T MRI, the degree of endolymphatic hydrops in patients with unilateral MD and to describe the results with other complementary tests used in neurolotogical clinic Material and Methods: A controlled prospective cross-sectional study that evaluated 5 cases of patients diagnosed with unilateral defined MD and 5 healthy controls all performed 3 Tesla MRI. Only patients were underwent to vestibular evoked myogenic potentials (cVEMP), Electrocochleography (ECochG), Vectoelectronystagmography (ENG) and Video Head Impulse Test (vHIT). The degree of dilation of the membranous labyrinth verified by de 3.0 T MRi were classified as absent, mild when up to 2/3 of distension of endolymphatic space and significant when more than 2/3. Results: The endolymphatic hydrops in patients with DM was verified by MRI 3.0 T in 4 cases. Only one patient presented dilatation of the contralateral membranous labyrinth, light and in the vestibule, a finding that supports the vestibular hypofunction in asymptomatic side. Four patients presented vestibular hypofunction at ENG the same side of abnormalities on MRi and absence of waves in cVEMP, gain reduction was observed in only 2 patients and increased SP / AP at EChcoG in only 1 patient on the same side of the altered image at 3.0 T MRi. Conclusion:The presence of endolymphatic hydrops signs were observed in 80% of patients with unilateral defined MD, 80% on the symptomatic side and 20% on the asymptomatic side, the ENG was altered n 60% of the results, the EcochG in 20%, the vHIT in 60%, cVEMP% in 60% in these patients.