A stroke is sometimes called a "brain attack." A stroke can injure the brain like a heart attack can injure the heart. Stroke is the result of cerebrovascular disease - disease of the blood vessels in the brain.
Stroke is the nation's third leading cause of death. Stroke is a type of cardiovascular disease. Itaffects the arteries leading to and within the brain. A stroke occurs when a blood vessel that carries oxygen and nutrients to the brain is either blocked by a clot or bursts. When that happens, part of the brain cannot get the blood (and oxygen) it needs, so it starts to die.Source: http://www.strokeassociation.org/presenter.jhtml?identifier=3030387