Explanation
Blood pressure, the force of blood against artery walls, is measured in millimeters of mercury (mm HG) and recorded as two numbers: systolic (pressure on the arterial walls as the heart contracts) over diastolic (pressure on the arterial walls as the heart relaxes between beats). Both numbers are important.
Click here to see a chart that will help you recognize the differences between optimal and high (hypertensive) blood pressure for adults (measured in mm Hg).
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