Fifth Stage Internal Medicine Dr. Abbas / Lec . 81
Transient ischemic attack (TIA)• Transient ischemic attack (TIA) is defined as a transient episode of neurologic
dysfunction caused by focal brain, spinal cord, or retinal ischemia, without acute
infarction . Central nervous s ystem (CNS) infarction is defined as brain, spinal
cord, or retinal cell death attributable to ischemia, based on neuropathologic,
neuroimaging, and/or clinical evidence of permanent injury .
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