THESES
The contribution of transcranial doppler sonography to the diagnosis of ischemic cerebrovascular accident (Abstract)* * Tese de Doutorado, Faculdade de Medicina da Universidade de São Paulo (Área: Neurologia). Orientador: José Paulo Smith Nóbrega. . Thesis. São Paulo, 1995
A contribuição do Doppler transcraniano para a investigação do acidente vascular cerebral isquêmico (Resumo)
Roberto Hirsch** ** Address: Rua Jesuíno Maciel 1297, 04615-003 São Paulo SP. Brasil. FAX 011 530 2400.
BACKGROUND AND PURPOSE: We intended to establish transcranial Doppler (TCD) criteria to quantify extracranial internal artery stenosis (ICA) in order to identify severe disease.
METHODS: TCD and Duplex criteria were compared in two groups divided according to NASCET angiographic degree of stenosis as over and under 70%. One TCD criterion, the upstroke time fraction (UST-F), was designed to quantify flow acceleration.
RESULTS: UST-F identified the severe stenosis group, though failed to differentiate occluded ICA.
CONCLUSION: TCD is reliable to identify severe stenosis in ICA, but not occlusion. Since ICA occlusion is identifiable by Duplex, the combination of TCD and Duplex can refer surgical treatment according to NASCET standards.
Key words: ischemic stroke, transcranial Doppler sonography, diagnosis.
Publication Dates
-
Publication in this collection
10 Nov 2010 -
Date of issue
Sept 1996
