![]() But knowing you're at risk can motivate you to change your lifestyle to reduce other risks. You can't change the following risk factors for a TIA and stroke. Some risk factors for a TIA and stroke can't be changed. A blood clot moving to an artery that supplies the brain from another part of the body, most commonly from the heart, also may cause a TIA. Plaques can decrease the blood flow through an artery or lead to the development of a clot. The underlying cause of a TIA often is a buildup of cholesterol-containing fatty deposits called plaques (atherosclerosis) in an artery or one of its branches that supplies oxygen and nutrients to the brain. In a TIA, unlike a stroke, the blockage is brief, and there is no permanent damage. ![]() In an ischemic stroke, a clot blocks the blood supply to part of the brain. ![]() A TIA has the same origins as that of an ischemic stroke, the most common type of stroke.
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