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High Blood Pressure
What Is High Blood Pressure?
Blood pressure is always given as two numbers, the systolic and
diastolic pressures. Both are important. Usually they are written
one above or before the other -- for example, 120/80 mmHg. The top,
or first, number is the systolic and the bottom, or second number,
is the diastolic. If your blood pressure is 120/80, you say that it
is "120 over 80."
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