Every 45 seconds, someone in America has a stroke; every three minutes, some-one dies of one. That translates into 700,000 strokes and 165,000 deaths each year, making ischemia (the technical term for the most common type of stroke) the nation's No. 3 killer. Even among survivors, strokes can exact a terrible toll: aftereffects range from difficulty walking, speaking and carrying out the everyday activities of life to depression and paralysis.
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