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1] What does 120/80 mmHg mean?
Blood pressure, if lower than 120/80 mmHg,is an example of a normal reading, is measured in millimeters of mercury (mmHg) and displays as two numbers:
1. **systolic pressure,** the first, the higher pressure as your heart contracts to pump blood into your arteries) "over"
2. **diastolic pressure,** the second lower pressure as your heart relaxes between contractions).
Why mmHg? mmHg was first used to measure systolic pressure in 1896 and a decade later was refined to measure the diastolic pressure as well. It remains essentially unchanged today. BP is *written* “120/80 mmHg” and is *stated* "120 over 80". Long story short: a normal blood pressure is lower than 120/80 mmHg.
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