Prosthetic valve with angularly offset frames
Prosthetic valves and methods of use of prosthetic valves may be provided. In one implementation, a prosthetic valve may include an annular outer frame formed of struts intersecting at outer frame junctions, an inner frame situated within the outer frame and formed of struts intersecting at inner frame junctions, and a plurality of tissue anchors extending from the outer frame. The junctions along a downstream end of the outer frame may be spaced apart circumferentially from the junctions along a downstream end of the inner frame. The outer frame may include an anchor support strut extending between a downstream junction of the outer frame and a point of connection between one of the tissue anchors and the outer frame. The anchor support strut may be configured for placement parallel to a longitudinal axis of the prosthetic valve.
1. A prosthetic valve for implantation within a native heart valve, the prosthetic valve comprising:
an annular outer frame formed at least partially of outer frame struts intersecting at a plurality of outer frame junctions, the annular outer frame having a plurality of downstream junctions along a downstream end of the annular outer frame;
an inner frame situated at least partially within the annular outer frame, the inner frame formed at least partially of inner frame struts intersecting at a plurality of inner frame junctions, the inner frame having a plurality of downstream junctions along a downstream end of the inner frame, wherein
the inner frame is configured to have a greater axial length than the annular outer frame and to extend in a downstream direction beyond the downstream end of the annular outer frame, and
the downstream junctions of the annular outer frame are spaced apart circumferentially from the downstream junctions of the inner frame; and
a plurality of tissue anchors extending from the annular outer frame, wherein
the annular outer frame includes at least one anchor support strut extending between a downstream junction of the annular outer frame and a point of connection between at least one tissue anchor and the annular outer frame, the at least one anchor support strut being configured for placement parallel to a longitudinal axis of the prosthetic valve.
2. The prosthetic valve of claim 1 , wherein the at least one anchor support strut is configured to be arranged parallel to the longitudinal axis of the prosthetic valve when the prosthetic valve is in a compressed delivery state.
3. The prosthetic valve of claim 1 , wherein the downstream junctions of the annular outer frame are spaced apart circumferentially from and alternate in a circumferential direction with the downstream junctions of the inner frame.
4. The prosthetic valve of claim 1 , wherein along a circumference of the prosthetic valve:
the downstream junctions of the annular outer frame are offset at a regular interval from the downstream junctions of the inner frame, and
the inner frame junctions along an upstream end of the inner frame are offset at a regular interval from the outer frame junctions along an upstream end of the annular outer frame.
5. The prosthetic valve of claim 1 , further comprising:
a plurality of inner frame tissue anchors extending from the inner frame, wherein a portion of at least one inner frame tissue anchor is configured to form a radially-outermost portion of the prosthetic valve relative to the longitudinal axis of the prosthetic valve when the at least one inner frame tissue anchor engages the native heart valve.
6. The prosthetic valve of claim 5 , wherein the at least one inner frame tissue anchor is configured to be situated at the same position along a circumference of the prosthetic valve as at least one downstream junction of the inner frame.
7. The prosthetic valve of claim 5 , wherein
the inner frame tissue anchors are spaced apart circumferentially from the tissue anchors of the annular outer frame, and
beyond locations of connection to the inner frame, the inner frame tissue anchors are devoid of interconnections therebetween.