A valve prosthesis which is especially useful in the case of aortic stenosis and capable of resisting the powerful recoil force and to stand the forceful balloon inflation performed to deploy the valve and to embed it in the aortic annulus, comprises a collapsible valvular structure and an expandable...http://www.google.com.au/patents/US20050251251?utm_source=gb-gplus-sharePatent US20050251251 - Valve prosthesis for implantation in body channels
