A stroke occurs when blood flow to part of the brain is cut off or drastically reduced. If blood flow is cut off for several hours or more, brain cells die without adequate blood flow.
Depending on the amount of blood in the brain and the location of the stroke, a person with a stroke may experience many symptoms. These can range from difficulty moving or speaking, to paralysis or death, in a barely noticeable way.
Stroke care has changed dramatically over the past 15 years due to new drugs, improved diagnosis and treatment methods. It is possible to treat an acute event today, and recognizing a stroke and getting emergency help is crucial.
About 795,000 new strokes occur each year in the United States. Stroke is one of the most common causes of death (after heart disease and cancer). Stroke is more common in the elderly, but it can happen to people of any age, including children. African Americans have a higher risk of stroke than Caucasians. Hispanics have a moderate risk.
A transient ischemic attack (also known as a TIA or mini-stroke) is similar to a stroke, except that with a TIA, the symptoms usually resolve within 24 hours. People who have a TIA are more likely to have a stroke in the near future.
causes of stroke
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