A stroke is, literally, a "brain attack." A stroke occurs when a blood clot blocks an artery (carries blood from the heart to the body) or a blood vessel (moves blood through the body) breaks, interrupting blood flow to an area of the brain.
Strokes can be classified into to main categories: ischemic and hemorrhagic. An ischemic stroke occurs when a blood vessel supplying the brain becomes blocked and impairs blood flow to the brain. Brain cells and tissue begin to die from lack of oxygen and nutrients within minutes of the blockage occurring. About 80% of strokes fall into this category.
A hemorrhagic stroke occurs when an artery supplying the brain ruptures and bleeds into the brain. Brain cells and tissues do not receive oxygen and nutrients when a rupture occurs. Irritation and swelling of the surrounding tissues can also occur due to pressure build up. About 20% of strokes fit into this category.
Ischemic and hemorrhagic strokes are each broken down into two categories. For more on these categories, visit the Ohio State University Medical Center.
Risk Factors
Anyone can have a stroke. Man or woman, old or young. There are certain risk factors that can increase the likelihood of having a stroke.
Read more: http://disabilities.suite101.com/article.cfm/stroke#ixzz0P0oBd4IL
Strokes can be classified into to main categories: ischemic and hemorrhagic. An ischemic stroke occurs when a blood vessel supplying the brain becomes blocked and impairs blood flow to the brain. Brain cells and tissue begin to die from lack of oxygen and nutrients within minutes of the blockage occurring. About 80% of strokes fall into this category.A hemorrhagic stroke occurs when an artery supplying the brain ruptures and bleeds into the brain. Brain cells and tissues do not receive oxygen and nutrients when a rupture occurs. Irritation and swelling of the surrounding tissues can also occur due to pressure build up. About 20% of strokes fit into this category.
Ischemic and hemorrhagic strokes are each broken down into two categories. For more on these categories, visit the Ohio State University Medical Center.
Risk Factors
Anyone can have a stroke. Man or woman, old or young. There are certain risk factors that can increase the likelihood of having a stroke.
Read more: http://disabilities.suite101.com/article.cfm/stroke#ixzz0P0oBd4IL
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