title: In vitro comparison between the hydrodynamic characteristics of the Hancock 250 (modified orifice) xenografts and the Björk-Shiley aortic valve prostheses.
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000502:physiology / Q000637:transplantation*; D055592:Biophysical Phenomena; D001703:Biophysics; D006350:Heart Valve Prosthesis; D006801:Humans; D008953:Models, Anatomic; D011312:Pressure; D012212:Rheology; D013552:Swine; D014183:Transplantation, Heterologous