Compliance is the ability of a hollow organ (vessel) to distend and increase volume with increasing transmural pressure or the tendency of a hollow organ to resist recoil toward its original dimensions on application of a distending or compressing force.
The reciprocal of compliance is elastance, a measure of the tendency of a hollow organ to recoil toward its original dimensions upon removal of a distending or compressing force.
is the change in pressure (mmHg):[3] Physiologic compliance is generally in agreement with the above and adds
Adaptation of equations initially applied to rubber and latex allow modeling of the dynamics of pulmonary and cardiac tissue compliance.
Pressure stockings are sometimes used to externally reduce compliance, and thus keep blood from pooling in the legs.
Vasodilation and vasoconstriction are complex phenomena; they are functions not merely of the fluid mechanics of pressure and tissue elasticity but also of active homeostatic regulation with hormones and cell signaling, in which the body produces endogenous vasodilators and vasoconstrictors to modify its vessels' compliance.
In patients whose endogenous homeostatic regulation is not working well, dozens of pharmaceutical drugs that are also vasoactive can be added.
Vasoactivity can vary between persons because of genetic and epigenetic differences, and it can be impaired by pathosis and by age.
They wrote this in the "Handbook of Physiology" in 1963 in work entitled "Pulsatile Flow in the Vascular System".
[5] Compliance, in simple terms, is the degree to which a container experiences pressure or force without disruption.
An increase in the age and also in the systolic blood pressure (SBP) is accompanied with decrease on arterial compliance.
It is actually a part of a vicious cycle that further elevates blood pressure, aggravates atherosclerosis (hardening of the arteries), and leads to increased cardiovascular risk.
Pulse contour analysis is a non-invasive method that allows easy measurement of arterial elasticity to identify patients at risk for cardiovascular events.