Browse A-ZABCDEFGHIJKLMNOPQRSTUVWXYZ0-9 Blood pressure Blood pressure is the force applied against the walls of the arteries as the heart pumps blood through the body. The pressure is determined by the force and amount of blood pumped and the size and flexibility of the arteries. Review Date: 4/20/2015 Reviewed By: The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.