Irregular heartbeat called atrial fibrillation.High blood pressure is the main risk for TIAs and stroke. Narrowing of a blood vessel in the brain or leading to the brain.A blood clot that travels to the brain from somewhere else in the body (for example, from the heart).The loss of blood flow to an area of the brain can be caused by: A TIA does not cause brain tissue to die.
After a TIA, the blockage breaks up quickly and dissolves on its own.
