The Top Number: Systolic pressure, measured on the heartbeat.Respectively, the systolic and diastolic numbers record the amount of pressure your blood exerts onto the walls of your arteries when the heart pumps and when it relaxes between beats. When your heart beats, it pushes blood through your arteries and veins, delivering the oxygen and nutrients your body’s cells need to function. What’s What? Understanding Systolic and Diastolic Numbers To understand what your blood pressure readings mean, you need to know a little anatomy, the difference between the two numbers and also which readings would be considered low, normal or high. When finished, you will have your blood pressure reading given to you as two numbers, for example 120/70 mm Hg (read: 120 over 70 millimeters of mercury). Home blood pressure measuring devices and those at pharmacies use the same basic principles to measure blood pressure. As the arm cuff slowly deflates, he or she will listen to your pulse with a stethoscope while watching a gauge on the cuff which measures the pressure inside your veins in a scale of units called millimeters of mercury (mmHg). The healthcare professional then places a cuff around your upper arm and inflates it. You might have to remove your arm from a bulky sleeve and sit with your legs uncrossed in front of you.
If you have ever been to see a doctor, then you have had your blood pressure taken, usually by a nurse before your appointment begins.
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