RESUMO
Stroke mimics account for up to a third of suspected strokes. The main causes are epileptic deficit, migraine aura, hypoglycemia, and functional disorders. Accurate recognition of stroke mimics is important for adequate identification of candidates for thrombolysis. This decreases the number of unnecessary treatments and invasive vascular investigations. Correctly identifying the cause of symptoms also avoids delaying proper care. Therefore, this pictorial review focuses on what the radiologist should know about the most common MRI patterns of stroke mimics in the first hours after onset of symptoms. The issues linked to the accurate diagnosis of stroke mimics in the management of candidates for thrombolysis will be discussed.
Assuntos
Epilepsia/patologia , Hipoglicemia/patologia , Imageamento por Ressonância Magnética/métodos , Enxaqueca com Aura/patologia , Acidente Vascular Cerebral/patologia , Diagnóstico Diferencial , Humanos , Aumento da Imagem/métodos , Programas de Rastreamento/métodos , Seleção de Pacientes , Acidente Vascular Cerebral/prevenção & controle , Terapia TrombolíticaRESUMO
Patients need to be examined for intracranial aneurysms if they have had a subarachnoid hemorrhage. The preferred technique in this situation is CT angiography. Screening can be done for familial forms or for elastic tissue disorders, for which the first line investigation is magnetic resonance angiography. These non-invasive methods have now taken over from conventional angiography that was reserved for the pretreatment phase. A good technical knowledge of these imaging methods, their artifacts and misleading images enables reliable detection of intracranial aneurysms and for an accurate report to be returned to clinicians.