What is stroke?

A stroke is a "brain attack". It can happen to anyone at any time. It occurs when blood flow to an area of brain is cut off. When this happens, brain cells are deprived of oxygen and begin to die. When brain cells die during a stroke, abilities controlled by that area of the brain such as memory and muscle control are lost.

How a person is affected by their stroke depends on where the stroke occurs in the brain and how much the brain is damaged. For example, someone who had a small stroke may only have minor problems such as temporary weakness of an arm or leg. People who have larger strokes may be permanently paralyzed on one side of their body or lose their ability to speak. Some people recover completely from strokes, but more than 2/3 of survivors will have some type of disability.

Hemorrhagic stroke

A brainaneurysm burst or a weakened blood vessel leak (hemorrhagic) is one of two types of stroke. While the least common of the two types of stroke it most often results in death.

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Ischemic stroke

A blood vessel carrying blood to the brain is blocked by a blood clot (ischemic) is one type of stroke. Learn more about the types of ischemic stroke.

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What is TIA?

When blood flow to part of the brain stops for a short period of time, also called transient ischemic attack (TIA), it can mimic stroke-like symptoms. These appear and last less than 24 hours before disappearing. Learn more about the signs, your risk, and TIA management.

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Stroke facts

Although stroke is the fifth leading cause of death in America and a leading cause of adult disability, many myths surround this disease. Test how much you know about stroke today

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