Assessment of the stentless mitral valve and operation using bioengineering method

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• Prosthetic Valve Technology

Background:

• The development of advanced prosthetic heart valves is crucial for improving patient outcomes.
• Bioengineering methods offer precise tools for evaluating valve performance.
• Understanding leaflet mechanics and hydrodynamic function is key to designing effective artificial valves.

Purpose of the Study:

• To assess the hydrodynamic performance of the Normo valve using bioengineering techniques.
• To compare the Normo valve's performance against a standard bioprosthetic valve.
• To evaluate the impact of template modifications on valve function and leaflet stress.

Main Methods:

• Utilized a pulsatile circulatory simulator to test the Normo valve and a control bioprosthesis (Mosaic).
• Investigated hydrodynamic performance, including pressure gradients and forward flow.
• Employed finite element analysis to assess leaflet stress under varying papillary muscle distances (18-36 mm).

Main Results:

• The Normo valve, using the original template design, exhibited the lowest pressure gradient for the large leaflet.
• For the small leaflet, the Normo valve showed the lowest pressure gradient and greatest forward flow.
• Leaflet stress increased at papillary muscle distances of 18 mm and 36 mm.

Conclusions:

• Bioengineering assessment confirms the validity and favorable design of the Normo valve.
• The study indicates a preferable positioning for the valve's fixation to papillary muscles.
• Results support the Normo valve's potential for effective clinical application.