After about 4 minutes without blood and oxygen, brain cells become damaged and may die. The body tries to restore blood and oxygen to the cells by enlarging other blood vessels (arteries) near the area.
Strokes can happen to anyone at any time, regardless of sex or age. Each year, nearly 800,000 people in the U.S. have a stroke, and 130,000 die from one. Of those who survive, more than two-thirds will have some disability. Recognizing stroke symptoms is key to preventing a needless death.
“Many patients who have a stroke develop droopiness on one side of the face. And they get weakness in the arm, so in many cases their arm falls to the side and they can’t lift it. If you ask them to smile, it’s...
If blood supply isn't restored, permanent damage usually occurs. The body parts controlled by those damaged cells cannot function.
This loss of function may be mild or severe. It may be temporary or permanent. It depends on where and how much of the brain is damaged and how fast the blood supply can be returned to the affected cells. Life-threatening complications may also occur. This is why it's important to get treatment as soon as possible.
Recovery depends on the location and amount of brain damage caused by the stroke, the ability of other healthy areas of the brain to take over for the damaged areas, and rehabilitation. In general, the less damage there is to the brain tissue, the less disability results and the greater the chances of a successful recovery.
Stroke is the most common nervous-system-related cause of physical disability. Of people who survive a stroke, half will still have some disability 6 months after the stroke.
You have the greatest chance of regaining your abilities during the first few months after a stroke. Regaining some abilities, such as speech, comes slowly, if at all. About half of all people who have a stroke will have some long-term problems with talking, understanding, and decision-making. They also may have changes in behavior that affect their relationships with family and friends.
After a stroke, you (or a caregiver) may also notice: