With a Stroke, Time Saves LivesMore than 700,000 Americans will suffer a stroke—or “brain attack”—this year. Of this number, 200,000 will be recurrent strokes. A stroke can injure the brain like a heart attack can injure the heart. It occurs when part of the brain doesn't get the blood it needs. Stroke prevention is still the best medicine, learn about stroke risk factors and stroke warning signs.
What Is a Stroke?A stroke occurs when blood flow to an area of the brain is interrupted. An ischemic stroke is caused by either a clot or a blocked artery. A hemorrhagic stroke is caused by a ruptured artery and blood leaks into the brain.
When blood flow is interrupted to an area, the brain cells in that area die. When brain cells die, they release chemicals that set off a "chain reaction" which can damage surrounding cells. Without PROMPT medical treatment, brain cells in the surrounding area will also die.
Each area of the brain controls specific abilities including speech, movement and memory. After a stroke the abilities controlled by the area where brain cells die will be impaired or lost.
Find out if you are at risk for a stroke.