What is the term for the pressure in blood vessels when the heart is at rest between contractions?

The term for the pressure in blood vessels when the heart is at rest between contractions is known as diastolic blood pressure. This measurement reflects the lowest level of pressure in the arteries during the cardiac cycle, specifically during the diastole phase when the heart relaxes and fills with blood. A healthy diastolic pressure is important for ensuring that the organs and tissues receive adequate blood supply between heartbeats.

Systolic blood pressure, in contrast, is the measure of pressure in the arteries when the heart beats and pumps blood. Pulse pressure is the difference between systolic and diastolic pressures and indicates the force that the heart generates each time it contracts. Mean arterial pressure is an average pressure in a person's arteries during one cardiac cycle and is calculated to assess overall blood flow and perfusion to the organs. Thus, diastolic blood pressure specifically captures the resting state of arterial pressure, making it the correct term for this phase of the cardiac cycle.