Mean systemic pressure

In medicine, the mean systemic pressure (mean systemic filling pressure (MSFP), or mean circulatory filling pressure, (MCFP)) is defined as the mean pressure that exists in the circulatory system when the blood has had a chance to redistribute evenly to all vessels and organs. MSP is approximately 7 mm of Hg. It is an indicator of how full the circulatory system is (i.e. the volume of blood in the system compared to the capacity of the system), and is influenced by the volume of circulating blood and the smooth muscle tone in the walls of the venous system (which determines the capacity of the system).