Compliance (physiology)
Blood vessels

The terms elastance and compliance are of particular significance in cardiovascular physiology and respiratory physiology. In compliance, an increase in volume occurs in a vessel when the pressure in that vessel is increased. The tendency of the arteries and veins to stretch in response to pressure has a large effect on perfusion and blood pressure. This physically means that blood vessels with a higher compliance deform easier than lower compliance blood vessels under the same pressure and volume conditions. Venous compliance is approximately 30 times larger than arterial compliance. Compliance is calculated using the following equation, where Δ V {\displaystyle \Delta V} is the change in volume (mL), and Δ P {\displaystyle \Delta P} is the change in pressure (mmHg):
detectable_format:title, combination:repeat_prompt