Change of residual strains in arteries due to hypertrophy caused by aortic constriction.
- 1 November 1989
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Circulation Research
- Vol. 65 (5), 1340-1349
- https://doi.org/10.1161/01.res.65.5.1340
Abstract
The stress and strain that remain in an organ when the external load is removed are called residual stress and strain. They can be revealed by cutting up the organ in such a way as to reveal the zero-stress configuration. The function of the organ depends on the residual strain. For a blood vessel, the zero-stress configuration is very different from that of the no-load condition, and it changes over time when the physical stress acting on the vessel is changed. Data on rat aorta are presented. Physical changes were obtained by constricting the aorta at the celiac trunk level with a band of metal. Banding causes an increase of blood pressure and hypertrophy of the vessel in the upper body and a transient decrease of blood pressure in the lower body. If the aorta is cut transversely into rings and each ring is cut radially, it will open up into a noncircular arc, which may be characterized by its opening angle. It is shown that the opening angle varies systematically along the aorta and that it changes significantly together with changes of blood pressure and hypertrophy. In the ascending aorta, the opening angle increased from 171 degrees and to 214 degrees in 4 days after banding, then decreased gradually to an asymptotic value of 126 degrees in 40 days. At other sections, the swing of opening angle is smaller. The implications are discussed.This publication has 12 references indexed in Scilit:
- Mechanical stresses and endochondral ossification in the chondroepiphysisJournal of Orthopaedic Research, 1988
- Residual stress and strain in aortic segmentsJournal of Biomechanics, 1987
- Strain energy density function and uniform strain hypothesis for arterial mechanicsJournal of Biomechanics, 1987
- Residual Stress in ArteriesPublished by Springer Science and Business Media LLC ,1986
- Functional adaptation in long bones: Establishing in vivo values for surface remodeling rate coefficientsJournal of Biomechanics, 1985
- BiodynamicsPublished by Springer Science and Business Media LLC ,1984
- Changes in arteriole in acute and chronic hypoxic pulmonary hypertension and recovery in ratJournal of Applied Physiology, 1983
- ESTIMATION OF RESIDUAL STRAINS IN AORTIC SEGMENTSPublished by Elsevier BV ,1983
- CHANGES IN HEART WEIGHT AND BLOOD PRESSURE FOLLOWING AORTIC CONSTRICTION IN RATSCanadian Journal of Biochemistry and Physiology, 1955
- Ueber die innere Architectur der Knochen und ihre Bedeutung für die Frage vom KnochenwachsthumVirchows Archiv, 1870