Transcatheter valve prosthesis
A transcatheter atrio-ventricular valve prosthesis for functional replacement of an atrio-ventricular heart valve in a connection channel, the prosthesis comprising a radially expandable tubular body extending along an axis, and a valve arranged within and attached to the tubular body. The tubular body is provided with an outer circumferential groove which is open to the radial outside of the tubular body, whereby the tubular body is separated by the outer circumferential groove into first and second body sections. The tubular body is provided with a first plurality of projections which extend from the first or second body section in an axial direction of the tubular body and each of which has a free end arranged to overlap the outer circumferential groove. An elongate outer member may be disposed at the exterior of the connection channel wall structure at a level of the circumferential groove.
1. A system for implanting a heart valve, comprising:
a radially self-expandable tubular body having an inflow end, an outflow end, and a preformed groove (a) disposed in an outer surface of the tubular body between the inflow end and the outflow end, (b) extending at least partially around the tubular body, and (c) having a circumferential opening facially radially outward of the tubular body,
the preformed groove being a depression in the outer surface of the tubular body such that the outer surface of the tubular body curves radially inward, and
the preformed groove being disposed in only a center area of the tubular body;
a valve disposed within and attached to the tubular body; and
a trapping member configured to form at least a partial loop in a circumferential direction around the preformed groove when the tubular body is fully expanded, wherein:
the inflow end of the tubular body is self-expandable to a shape that constrains movement of the tubular body in an outflow direction by contact in a flow direction between the inflow end of the tubular body and an annulus of a native heart valve when the tubular body is deployed within a heart and aligned with the native heart valve, and
the trapping member is configured to extend around portions of chordae and/or leaflets of the native heart valve located within the groove when the tubular body is deployed within the patient and aligned with the native heart valve, and constrain movement of the tubular body in a direction opposite the flow direction.
2. The system according to claim 1 , wherein the tubular body is a stent.
3. The system according to claim 1 , wherein the trapping member includes a partial loop.
4. The system according to claim 1 , wherein the trapping member includes a closed loop.
5. The system according to claim 1 , wherein the trapping member and the tubular body are configured to leave a radial gap between (a) at least one of the trapping member and the tubular body and (b) chordae or valve leaflets, when the trapping member is deployed around portions of chordae and leaflets of the native valve within the groove and the tubular body is fully expanded.
6. The system according to claim 1 , wherein the trapping member is not configured to apply a radial force inward when deployed.
7. The system according to claim 1 , further comprising a projection having a first end located at a side surface of the tubular body and a second free end, the groove defined between the projection and the side surface of the tubular body.
8. The system according to claim 1 , wherein an outer diameter of the inflow end is greater than an outer diameter of the outflow end.
9. The system according to claim 1 , wherein the preformed groove is disposed in only a center area of the tubular body such that the preformed groove is distal of a proximalmost end of the tubular body and is proximal of a distalmost end of the tubular body.
10. The system according to claim 1 , further comprising an elongate outer member configured to extend at least partially around the tubular body to radially force the portions of chordae and/or leaflets into the preformed groove.