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Interlayer Micromechanics of Semilunar Heart Valve Leaflets

[+] Author Affiliations
Rachel M. Buchanan, Michael S. Sacks

The University of Texas at Austin, Austin, TX

Paper No. SBC2013-14771, pp. V01AT04A029; 2 pages
doi:10.1115/SBC2013-14771
From:
  • ASME 2013 Summer Bioengineering Conference
  • Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotransport Phenomena; Bone, Joint and Spine Mechanics; Brain Injury; Cardiac Mechanics; Cardiovascular Devices, Fluids and Imaging; Cartilage and Disc Mechanics; Cell and Tissue Engineering; Cerebral Aneurysms; Computational Biofluid Dynamics; Device Design, Human Dynamics, and Rehabilitation; Drug Delivery and Disease Treatment; Engineered Cellular Environments
  • Sunriver, Oregon, USA, June 26–29, 2013
  • Conference Sponsors: Bioengineering Division
  • ISBN: 978-0-7918-5560-7
  • Copyright © 2013 by ASME

abstract

The aortic and pulmonary semilunar heart valve leaflets (AV and PV respectively) are heterogeneous structures comprised of three distinct tissue layers. All three layers contain varying amounts of collagen, elastin and glycosaminoglycans (GAGs). The fibrosa layer is an undulated structure that faces the aorta comprised primarily of Type 1 collagen highly aligned in the circumferential direction. On the opposite face of the valve is the ventricularis layer that is populated with an organized elastin network. The spongiosa layer resides between the fibrosa and ventricularis and is rich in GAGs. All three layers work in unison at the tissue level to produce effective leaflet mechanical behavior. While the mechanical behavior of the fibrosa and ventricularis layers have been well studied [1], little information exists on the effective mechanical behavior of the GAG rich spongiosa layer.

Copyright © 2013 by ASME

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