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Effect of Blood Pressure on Closing Dynamics of Bileaflet Mechanical Heart Valves

[+] Author Affiliations
Marcio H. Forleo, Brennan M. Johnson, Lakshmi P. Dasi

Colorado State University, Fort Collins, CO

Paper No. SBC2012-80736, pp. 223-224; 2 pages
doi:10.1115/SBC2012-80736
From:
  • ASME 2012 Summer Bioengineering Conference
  • ASME 2012 Summer Bioengineering Conference, Parts A and B
  • Fajardo, Puerto Rico, USA, June 20–23, 2012
  • Conference Sponsors: Bioengineering Division
  • ISBN: 978-0-7918-4480-9
  • Copyright © 2012 by ASME

abstract

Implantation of a bileaflet mechanical heart valve (BMHV) continues to be associated with a risk of thromboembolic complications despite anti-coagulation therapy1. This has been attributed to the structurally rigid design of the leaflets and valve mechanics combined with an intricate hinge mechanism for the rigid leaflets. The lack of a built in compliance within the valve mechanics presumably leads to sharp stress gradients within the flow as well as a violent closure of the valve often associated with the audible impact of the leaflets to the housing, and a potential for momentary cavitation of blood in the wake of leaflet impact.

Copyright © 2012 by ASME

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