According to recent estimates, nearly one in three U.S. adults has high blood pressure, but because there are no symptoms,
nearly one-third of these people don't know they have it. In fact, many people have high blood pressure for years without
knowing it. Uncontrolled high blood pressure can lead to stroke, heart attack, heart failure or kidney failure. This is why
high blood pressure is often called the "silent killer." The only way to tell if you have high blood pressure is to have
your blood pressure checked. - American Heart Association (2007)
