Stroke caused the death of 6.2 million people and tends to be higher in African-Americans. It is caused by the rapid loss of brain function due to a disturbance in the blood supply. This can be caused by lack of blood flow because of a blockage, or a hemorrhage. As a result the affected area of the brain cannot function, which can cause many serious problems later, such as lack of limb movement, or an inability to see.
A stroke is a medical emergency that can end with permanent neurological damage or death. Risk factors include old age, high blood pressure, previous history with strokes, diabetes, tobacco smoking, high cholesterol, and atrial fibrillation. It is the second most common and leading cause of death around the world.
About 87% of all strokes are caused by ischemia (hemorrhagic transformation). A hemorrhage is the accumulation of blood anywhere within the skull, and can be inside the brain or outside. It is unclear how many hemorrhages cause a stroke.
Source: http://www.therichest.com
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