A prosthetic valve assembly for implantation within a native aortic valve using a catheterization technique. The prosthetic valve assembly includes a collapsible and expandable metallic frame. The frame is constructed to resist the recoil forces of the native aortic valve. The frame may be formed with...http://www.google.de/patents/US7846204?utm_source=gb-gplus-sharePatent US7846204 - Aortic valve prosthesis having natural tissue and an internal cover
