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The human brain requires a constant supply of oxygenated blood. Simply put, a stroke occurs when that blood flow is cut off. Brain cells deprived of oxygen begin to die, affecting functions such as memory and muscle control.
Most strokes-about 87%-are caused when a blood vessel is blocked by a clot. (This is called an ischemic stroke.) A stroke can also be caused when a blood vessel ruptures. Blood spills in and causes swelling and pressure that damage brain tissue. (This is called a hemorrhagic stroke.)
Stroke is fatal in about 10 to 20 percent of cases. Some people recover completely from a stroke, but more than 2/3 of survivors will experience some kind of permanent disability.
Every year, more than 795,000 Americans have a stroke. About one of four are in people who have had a previous stroke. Stroke is the fifth leading cause of death in the U.S. and the leading cause of adult disability.
There are many different symptoms. A stroke victim may experience one or more of the following:
Do NOT “wait and see.” Getting treatment fast is critical and can mean the difference between recovery and lifelong disability or death.
If you think someone may be having a stroke, “act F.A.S.T.” and do the following simple test:
The most effective stroke treatments are only available if the stroke is recognized and diagnosed within three hours of the first symptoms.
There are many risk factors. Below are some of the most critical ones. You can’t control all of them, but many are manageable.
Age — The chance of having a stroke approximately doubles for each decade of life after age 55, though it can strike anyone at any time.
Family history — If a parent, grandparent, or sibling has had a stroke, your risk increases.
Gender — Women have more strokes than men, but this is mainly because women tend to live longer, which means they spend more time in greater risk. The incidence of stroke is higher in men at younger ages.
High blood pressure — This is the leading cause of stroke. It can be managed through diet, exercise, and medication.
Cigarette smoking — Nicotine and carbon monoxide damage the cardiovascular system. Smokers who use oral contraceptives are at even greater risk.
Diabetes, high cholesterol, inactivity and obesity — Each of these items alone are risk factors for stroke. Statistically speaking, a person with one of these risks is likely to have others also in the list, which compounds the overall risk.