Analysis of the influence of belly thickness and free edge curves on the hemodynamic performance of a polymer heart valve

Abstract

Polymer heart valves are emerging as a viable attractive substitute for mechanical and biological valves because of recent developments in material and manufacturing production. This study focuses on key aspect of design optimization in addressing challenges associated with the fatigue and hemodynamic performance of polymer heart valves. Numerical simulations were conducted to investigate the effects of belly and free edge curves on the mechanical stress and hemodynamic performance of the leaflets. Results showed that increasing leaflet thickness reduced stress and uncontrolled thickness could result in stiffer valves affecting valve natural functioning. Curved free edges of the leaflets also necessitated more effort to unfold them fully. Optimizing leaflet curvature and thickness could significantly improve valve performance.