Dystolic Blood Pressure

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Diastolic Blood Pressure? Dystolic blood pressure is a common misspelling of diastolic blood pressure.

Two important numbers are used to measure blood pressure. These numbers are written in the form of a fraction. The top number is the systolic blood pressure, which measures the pressure inside the blood vessels at the moment your heart beats. The bottom number is the diastolic blood pressure, which measures the pressure in the blood vessels when your heart is at rest. Many people consider normal blood pressure to be 120/80.

(Click Diastolic Blood Pressure for more detailed information on how diastolic blood pressure is measured and some guidelines for what is considered normal, low, or high diastolic readings. You can also click any of the links in the box to the right for specific information.)