Methods and apparatus for endovascular heart valve replacement comprising tissue grasping elements
A method for endovascularly replacing a patient's heart valve including the following steps: endovascularly delivering an anchor and a replacement valve supported within the anchor to a vicinity of the heart valve in a collapsed delivery configuration, the anchor having grasping elements adapted to grasp tissue in a vicinity of the heart valve; expanding the anchor, thereby rotating the grasping elements; and grasping the tissue with the rotating grasping elements.
1. A replacement heart valve implant, comprising:
an expandable tubular anchor member having a delivery configuration and a deployed configuration, the expandable tubular anchor member defining a lumen extending axially therethrough along a central longitudinal axis from an inflow end of the expandable tubular anchor member to an outflow end of expandable tubular anchor member;
a plurality of valve leaflets disposed within the lumen of the expandable tubular anchor member;
a first circumferential set of grasping elements that extend radially outward from the expandable tubular anchor member proximate the inflow end of the expandable tubular anchor member and extend in a first axial direction defined from the outflow end of the expandable tubular anchor member towards the inflow end of the expandable tubular anchor member, the first circumferential set of grasping elements being configured to engage an annulus of a native heart valve; and
a second circumferential set of grasping elements that extend radially outward from the expandable tubular anchor member and in the first axial direction, the second circumferential set of grasping elements being spaced apart axially from the first circumferential set of grasping elements toward the outflow end of the expandable tubular anchor member.
2. The replacement heart valve implant of claim 1 , wherein the second circumferential set of grasping elements is configured to engage native valve leaflets of a native heart valve.
3. The replacement heart valve implant of claim 1 , further including a seal member extending along an exterior of the expandable tubular anchor member.
4. The replacement heart valve implant of claim 3 , wherein the seal member extends between the first circumferential set of grasping elements to the second circumferential set of grasping elements.
5. The replacement heart valve implant of claim 4 , wherein the seal member extends over the first circumferential set of grasping elements.
6. A replacement heart valve implant, comprising:
an expandable tubular anchor member having a delivery configuration and a deployed configuration, the expandable tubular anchor member having a body defining a lumen extending axially therethrough along a central longitudinal axis from an inflow end of the expandable tubular anchor member to an outflow end of expandable tubular anchor member;
a plurality of valve leaflets disposed within the lumen of the body of the expandable tubular anchor member;
a first circumferential set of grasping elements that extend radially outward from the body of the expandable tubular anchor member proximate the inflow end of the expandable tubular anchor member and in a first axial direction defined from the outflow end of the body of the expandable tubular anchor member towards the inflow end of the body of the expandable tubular anchor member, the first circumferential set of grasping elements being configured to resist downstream migration of the expandable tubular anchor member through a native heart valve, the first circumferential set of grasping elements being configured to engage an annulus of the native heart valve;
a second circumferential set of grasping elements extending radially outward from the body of the expandable tubular anchor member and in the first axial direction, the second circumferential set of grasping elements being spaced apart axially from the first circumferential set of grasping elements toward the outflow end of the expandable tubular anchor member; and
a tubular seal member disposed exterior to the body of the expandable tubular anchor member, the tubular seal member being configured to prevent blood flow around the expandable tubular anchor member in the deployed configuration.
7. The replacement heart valve implant of claim 6 , wherein the tubular seal member extends between the first circumferential set of grasping elements to the second circumferential set of grasping elements.
8. The replacement heart valve implant of claim 7 , wherein the tubular seal member extends over the first circumferential set of grasping elements and the second circumferential set of grasping elements.
9. The replacement heart valve implant of claim 6 , wherein the second circumferential set of grasping elements is configured to engage native valve leaflets of the native heart valve.
10. The replacement heart valve implant of claim 6 , wherein the second circumferential set of grasping elements is configured to resist upstream migration of the expandable tubular anchor member through the native heart valve.