ALERT

Due to the overwhelming surge in COVID-19 cases and the strain it has placed on health care capacity in the communities we serve, the Idaho Department of Health and Welfare has activated crisis standards of care statewide. We are open and available to see patients, but you may experience delays at our ERs, hospitals, and clinics. We appreciate your patience. Access more info on COVID testing, vaccination, visitor policy, hospitalization data, and FAQs.

toggle mobile menu Menu
toggle search menu

Site Navigation

Supplemental

Menu

Systolic and diastolic blood pressure

Systolic and diastolic blood pressure

Systolic blood pressure refers to the pressure of blood in the artery when the heart contracts. It is the top (and higher) number in a blood pressure reading.

Diastolic blood pressure refers to the pressure of blood in the artery when the heart relaxes between beats. It is the bottom (and lower) number in a blood pressure reading.

For example, if a person's systolic pressure is 120 millimeters of mercury (mm Hg) and the diastolic pressure is 80 mm Hg, blood pressure is recorded as 120/80 and read as "120 over 80."

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Healthwise is a URAC accredited health web site content provider. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.