Your heart pumps oxygen-rich blood to all parts of your body. Blood pressure is the force at which blood presses against your artery walls.

It’s recorded as two numbers: Systolic pressure (top number) is taken when the heart is pumping and diastolic pressure (bottom number) is taken when heart is resting.

Quick facts:

• About 33% of American adults have high blood pressure.
• High blood pressure has no symptoms and is called “the silent killer.” In fact, nearly one third of people who have high blood pressure don't even know they have it.