A novel approach to flow visualization through mechanical heart valves.

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• Medical Device Innovation

Background:

• Mechanical heart valves (MHVs) are crucial for valvular disease but have limitations.
• Current MHVs often lack native valve hemodynamic efficiency and require anticoagulation.
• Thrombus formation remains a significant risk with existing MHVs.

Purpose of the Study:

• To introduce and evaluate a novel bileaflet mechanical heart valve (BMHV), the iValve.
• To assess the iValve's hemodynamic performance compared to conventional BMHVs.
• To investigate the potential of the iValve to reduce or eliminate anticoagulation therapy.

Main Methods:

• Development of a custom-built steady-state flow simulator for MHV visualization.
• Comparative flow analysis of the iValve against SJM/Abbott Regent and On-X valves.
• Detailed observation of flow patterns in critical central flow and hinge regions.

Main Results:

• The iValve demonstrated significantly reduced flow disturbances and vortex formation.
• Effective hinge washing was observed in the iValve during forward flow.
• The iValve design appears to minimize energy loss and shear stress on blood elements.

Conclusions:

• The iValve exhibits promising hemodynamic characteristics compared to conventional BMHVs.
• The novel steady-state flow simulator provides valuable insights into MHV flow dynamics.
• Further research, including pulsatile flow and in vivo studies, is warranted to validate the iValve's clinical potential.