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Stroke Health Center

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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.

Recommended Related to Stroke

Understanding Stroke -- Symptoms

You should consider these symptoms warning signs and consult your health care provider: Sudden weakness or numbness in the face, arm, or leg on one side of the body. Abrupt loss of vision, strength, coordination, sensation, speech, or the ability to understand speech. These symptoms may become worse over time. Sudden dimness of vision, especially in one eye. Sudden loss of balance, possibly accompanied by vomiting, nausea, fever, hiccups, or trouble with swallowing. Sudden and severe...

Read the Understanding Stroke -- Symptoms article > >

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:

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: September 09, 2014
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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