Valve prosthesis for implantation in body channels

摘要

The present invention relates to a prosthetic valve assembly for replacing a deficient native aortic valve, comprising:
a metallic frame formed with intercrossing bars, said frame being collapsible to a compressed diameter for advancement through a patient's body channel using a catheterization technique, said frame being expandable to an expanded position for implantation within said deficient native aortic valve;
a collapsible valvular structure having a base and an upper part, said base of said valvular structure fastened to said frame, said valvular structure formed of pericardial tissue for permitting blood flow in one direction; and
guiding means extending from said base to said upper part of said valvular structure for creating stiffened zones which induce said valvular structure to follow a patterned movement when moving from a closed state to an open state.