transient ischemic attack noun Pathology.
- a brief vascular spasm in which a partially blocked artery impedes blood flow to the brain, resulting in symptoms such as impaired vision, dizziness, numbness, or unconsciousness. Abbreviation: TIA
transient ischemic attack in Medicine transient ischemic attack n.
- A temporary blockage of the blood supply to the brain, typically caused by an embolus and usually lasting ten minutes or less, during which dizziness, blurring of vision, numbness on one side of the body, and other symptoms of a stroke may occur.ministroke