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Transient Ischemic Attacks (TIAs)
Temporary interruptions of blood flow which produce the same symptoms as a stroke. Many lay people refer to TIAs as "mini-strokes". Symptoms generally last minutes to hours, and then resolve. Blood clots often cause TIAs. There is not permanent damage (infarction) after a TIA by definition, although MRI imaging can reveal signs of ischemia. The use of a specialized MR imaging technique, known as diffusion weighted imaging (DWI), has increased the ability to detect infarction.
Over 30% of people who have a TIA and don’t get treatment, have a major stroke within 1 year.
Up to 15% of people who have a TIA will have a major stroke within 3 months. [61]
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