These three pieces are parts from the Lillehei-Nakib Toroidal Disc Mitral valves. There is one donut, one valve without a cloth suture, and one complete valve. The design is toroidal, meaning donut ...

This is a Lillehei-Kaster tilting-disc valve made of pyrolytic carbon. Approximately 17,500 of these valves were distributed. It is made of titanium and pyrolite-coated graphite. It has a low embolic ...

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Bioprosthetic valves lasts about 10-15 years. These are usually obtained from animals or human organ donors. Tissue valves seem to improve the patient’s hemodynamics, but tend to stiffen in 10-15 ...