A transient ischemic attack (TIA) is an event, sometimes called a mini-stroke, with stroke symptoms that last less than 24 hours before disappearing. Generally no permanent brain damage occurs, but TIAs are a serious warning sign of stroke and should not be ignored.
FACT: Up to 40 percent of all people who experience a TIA will go on to have an actual stroke.
FACT: Most studies show that nearly half of all strokes occur within the first two days after a TIA.
FACT: Within two days after a TIA, 5 percent of people will have a stroke.
FACT: Within three months after a TIA, 10 to 15 percent of people will have a stroke.