title: The development of the Björk-Shiley artificial heart valve.
mesh_terms: D001021:Aortic Valve; D005069:Evaluation Studies as Topic; D006350:Heart Valve Prosthesis / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D008943:Mitral Valve; D010969:Plastics; D011138:Polytetrafluoroethylene; D011474:Prosthesis Design; D013548:Sweden; D014481:United States
chemical_list: D010969:Plastics; D011138:Polytetrafluoroethylene