On large periodic motions of arteries

The large, radial periodic motion of an artery subjected to a dynamic inner pressure is studied through the use of finite deformation theory of elastic materials. The artery is assumed to behave as an isotropic, homogeneous and incompressible elastic material. Expressions for intramural pressure and wall stresses are obtained as a function of the large periodic motion. Dynamic effects are shown to both increase the diastolic pressure and decrease the systolic pressure. It is also shown that, under certain conditions, the artery may experience a negative intramural pressure, in which case the artery may collapse. The present study predicts very large circumferential stress and stress gradients which might lead the artery to arteriosclerosis.