Patent ID: 7252682

Claim:
A prosthetic valve assembly comprising: an implantable prosthetic valve; a radially expandable stent comprising at least one expandable zone that is configured, in an expanded state, to bear against a wall of the native body lumen in a manner so as to resist migration; and means for mounting the valve on the stent such that, when expanded, the valve is positioned outside of the zone; wherein the mounting means is configured such that the valve is axially movable with respect to the stent between a position of non-implantation outside the first zone to be expanded, and a position of implantation, which it can reach after expansion of the stent, in which it is immobilized axially with respect to the stent; and wherein the mounting means comprises at least one band integrated in the peripheral wall of the valve and having a shape memory, so that it keeps the valve pressed against the stent in the position of implantation of this valve.