With his test, once symptoms begin, the test is stopped and flow returns to normal in 10 seconds. This technique may be able to help us do that. The American Heart Association estimates that 50 million Americans have high blood pressure. High blood pressure is the leading risk factor for stroke, which is what happens when a blood vessel serving the brain is blocked by a blood clot or hemorrhages, impairing the flow of oxygen to that part of the brain. About 500,000 Americans suffer stroke every year.
Stroke is the third leading cause of death and the leading cause of disability in the United States.
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