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What Happens

When you have an ischemic stroke, the oxygen-rich blood supply to part of your brain is reduced. With a hemorrhagic stroke, there is bleeding in the brain.

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.

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Understanding Stroke -- Prevention

Measures that reduce the chances of stroke are the same as those for avoiding a heart attack. Adopt habits that promote cardiovascular health and deter atherosclerosis (hardening of the arteries). The essentials of a healthy lifestyle include a balanced diet; controlling weight; monitoring blood pressure and cholesterol levels; limiting alcohol; and not smoking. A few other tips to prevent stroke: Get appropriate medical treatment of atrial fibrillation. This heart arrhythmia can increase the...

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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

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:

Long-term problems

Long-term complications of a stroke, such as depression and pneumonia, may develop right away or months to years after a stroke.

Some long-term problems may be prevented with proper home treatment and medical follow-up. For more information, see Home Treatment.

WebMD Medical Reference from Healthwise

Last Updated: February 05, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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