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High Blood Pressure

Frequently Asked Questions

5. Blood pressure is always given as two numbers. What do they mean? - cont'd

The measurements 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."