title: Disc wear in the Björk-Shiley tilting disc valve. Experimental and clinical observations.
mesh_terms: D002244:Carbon; D005465:Fluorocarbon Polymers; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D006801:Humans; D008722:Methods; D011312:Pressure
chemical_list: D005465:Fluorocarbon Polymers; D002244:Carbon