title: Early diagnosis of obstructed aortic valve prostheses: a clinical challenge.
authors.forename: P M
authors.initials: PM
authors.lastname: Shah
mesh_terms: D001021:Aortic Valve / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D001705:Bioprosthesis; D001783:Blood Flow Velocity; D004452:Echocardiography; D006350:Heart Valve Prosthesis; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D011183:Postoperative Complications / Q000175:diagnosis*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013997:Time Factors