title: Study of the character of the motion of the shut-off elements in artificial heart valves with the aid of a photoelement.
mesh_terms: D006350:Heart Valve Prosthesis / Q000295:instrumentation / Q000379:methods / Q000592:standards; D008943:Mitral Valve / Q000502:physiology*; D008954:Models, Biological; D009991:Oscillometry; D010775:Photic Stimulation / Q000295:instrumentation; D012643:Selenium; D014586:USSR
chemical_list: D012643:Selenium