Blood Pressure Channel
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There are two main types of blood pressure: systolic (the "top" number) and diastolic (the "bottom" number). Blood pressure is simply the force that is exerted on the walls of the blood vessels as the blood flows through them. Basically, the systolic reading measures the pressure inside your blood vessels at the moment your heart beats, while the diastolic reading measures the pressure in your blood vessels between heartbeats (when your heart is resting). In many cases, a blood pressure reading of 120/80 is considered normal.
(Click Blood pressure to read the full eMedTV article on this topic. This article takes an in-depth look at how blood pressure is measured and the factors that can affect this measurement. You can also click any of the links in the box to the right for specific information.)
Written by/reviewed by: Arthur Schoenstadt, MD
Last reviewed by: Arthur Schoenstadt, MD