Types of Strokes
Stroke symptoms may differ, depending upon the type of stroke, where it occurs in the brain, and how severe it is. A less severe stroke may be more difficult to recognize.
An ischemic stroke happens when a vessel supplying blood to the brain becomes blocked. It can happen for a variety of reasons. For example, fatty deposits in arteries (atherosclerosis) can cause blood clots to form. Sometimes a blood clot forms in the heart from an irregular heartbeat called atrial fibrillation. It then travels to a place where it blocks an artery supplying the brain.
A hemorrhagic stroke happens when a weakened blood vessel ruptures and bleeds into the brain. This can also happen for a variety of reasons.
A transient ischemic attack (TIA) is a "mini stroke" from a temporary blockage. Although a TIA doesn't cause permanent brain damage, it may cause stroke warning signs, which may last minutes or even hours. Think of this as a warning sign you shouldn't ignore.
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