A blood pressure reading consists of two numbers that are written in the form of a fraction. The "top" number is the systolic pressure, which measures the pressure inside your blood vessels at the moment your heart beats. The "bottom" number is the diastolic pressure, which measures the pressure in your blood vessels between heartbeats, when your heart is resting. Normal blood pressure numbers range from 90/60 to 120/80.
(To read the full eMedTV article, click Blood Pressure Numbers. This article further discusses how to measure your blood pressure and what are considered normal, high, and low blood pressure numbers. You can also click any of the links in the box to the right for specific information.)
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