Changes in the durability of silicone rubber in ball-valve prostheses.
D001021:Aortic Valve / Q000601:surgery*; D001022:Aortic Valve Insufficiency / Q000209:etiology; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006326:Heart Auscultation; D006350:Heart Valve Prosthesis / Q000592:standards*; D006801:Humans; D012826:Silicone Elastomers / Q000592:standards*
D012826:Silicone Elastomers