Polyurethane artificial heart valves in animals.
D006350:Heart Valve Prosthesis; D006351:Heart Valves; D006354:Heart, Artificial; D011140:Polyurethanes; D014520:Urethane / Q000031:analogs & derivatives
D011140:Polyurethanes; D014520:Urethane
HEART VALVES; URETHANE/related compounds