title: Issues concerning the clinical evaluation of new prosthetic valves.
mesh_terms: D001021:Aortic Valve / Q000503:physiopathology / Q000601:surgery*; D002986:Clinical Trials as Topic / Q000379:methods*; D004452:Echocardiography; D005500:Follow-Up Studies; D006349:Heart Valve Diseases / Q000503:physiopathology / Q000601:surgery; D006350:Heart Valve Prosthesis / Q000009:adverse effects / Q000592:standards*; D006439:Hemodynamics; D006801:Humans; D007432:Intraoperative Period; D008943:Mitral Valve / Q000503:physiopathology / Q000601:surgery*; D011358:Product Surveillance, Postmarketing / Q000379:methods; D011474:Prosthesis Design / Q000592:standards; D011897:Random Allocation; D013923:Thromboembolism / Q000209:etiology; D013997:Time Factors