New Definition of TIA


 "a sudden neurological deficit of presumed vascular origin lasting less than 24 hours."


a transient episode of neurological dysfunction caused by focal brain, spinal-cord, or retinal ischemia, without acute infarction.

Stroke. Published online May 7, 2009.


For the evaluation of a TIA, which of the following is the preferred imaging study?
Answer: MRI
Patients with suspected TIA should be evaluated as soon as possible after an event, preferably with a diffusion-weighted or perfusion-weighted MRI.


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