clinical assessment diagnostic procedure of cardiovascular system blood pressure measurement 2020-01-21T21:13:22Z blood pressure monitoring CMO:0000003 Measurement of the pressure on the walls of the vessels as blood moves around the body. Systolic blood pressure is the pressure when the heart beats – while the heart muscle is contracting (squeezing) and pumping oxygen-rich blood into the blood vessels. Diastolic blood pressure is the pressure on the blood vessels when the heart muscle relaxes. The diastolic pressure is always lower than the systolic pressure. blood pressure assessment NCBIBook:NBK279251