A transient ischemic attack; a temporary disruption of blood flow to part of the brain causing stroke-like symptoms that resolve within 24 hours.
Modern medical acronym from 1960s, formed from 'transient ischemic attack'. From Latin transiens (passing over) and ischemia from Greek ischein (to hold back) + haima (blood).
TIAs are often called 'mini-strokes' and serve as crucial warning signs - about one-third of people who experience a TIA will later have a full stroke. The medical community's adoption of this acronym reflects how modern medicine creates shorthand for complex conditions.
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