New Definition of TIA

Old:[mid-1960s]

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

New:

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

Stroke. Published online May 7, 2009.

http://cme.medscape.com/viewarticle/702876?src=mpnews&spon=18&uac=124835MZ

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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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