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Blood Pressure
The pressure that blood exerts against the inside walls of major arteries. It is measured in millimeters of mercury (mm Hg). Systolic pressure is pressure at the time when the heart is pumping blood out to the body; it is the top number of a blood pressure reading. Diastolic pressure is pressure at the time when the heart is relaxed. It is the bottom number of the reading.
Glamour February 2008
Healthy Living 3rd Quarter 2007
