Apparatus and methods for implanting a replacement heart valve
Anchors and systems for docking a prosthetic heart valve at a native heart valve are disclosed. An anchor can include at least three coils and a seal positioned between at least two adjacent coils of the at least three coils. The seal circumscribes at least a portion of the at least two adjacent coils and has opposite ends that are spaced away from corresponding opposite ends of the at least three coils.
1. An anchor for docking a prosthetic heart valve at a native heart valve, the anchor comprising:
at least three coils; and
a seal positioned between at least two adjacent coils of the at least three coils, the seal circumscribing at least a portion of the at least two adjacent coils and having opposite ends that are spaced away from corresponding opposite ends of the at least three coils, wherein the seal is configured to slide along at least the portion of the two adjacent coils of the anchor.
2. The anchor of claim 1 , wherein the at least three coils include two coils having a first diameter and a third coil having a second diameter, the second diameter larger than the first diameter.
3. The anchor of claim 2 , wherein the two coils having the first diameter are the at least two adjacent coils that the seal circumscribes.
4. The anchor of claim 2 , wherein the third coil is a lower coil that extends from a lower end of the two coils, and wherein the third coil is configured to be positioned below an annulus of the native heart valve.
5. The anchor of claim 1 , wherein the at least three coils include an upper coil, a lower coil, and a middle coil, the middle coil disposed between the upper coil and the lower coil, and wherein a diameter of the lower coil is larger than a diameter of the middle coil.
6. The anchor of claim 1 , wherein a distal end of the opposite ends of the seal is tapered.
7. The anchor of claim 1 , wherein a proximal end of the opposite ends of the seal is tapered.
8. The anchor of claim 1 , wherein each end of the opposite ends of the seal is tapered.
9. A system for replacing a native heart valve, comprising:
an expansible helical anchor comprising:
at least three coils; and
a seal positioned between at least two adjacent coils of the at least three coils, the seal circumscribing at least a portion of the at least two adjacent coils and having opposite ends that are spaced away from corresponding opposite ends of the at least three coils, wherein the seal is configured to slide along at least the portion of the two adjacent coils of the anchor; and
a radially expansible prosthetic heart valve configured to be inserted within the at least two adjacent coils.
10. The system of claim 9 , wherein the at least three coils includes an upper coil, a lower coil, and a middle coil, the middle coil disposed between the upper coil and the lower coil, and wherein in a relaxed state, the middle coil has a first diameter and the lower coil has a second diameter which is larger than the first diameter.
11. The system of claim 10 , wherein upon application of an outward radial force by radial expansion of the radially expansible prosthetic heart valve, the middle coil is configured to expand from the first diameter to a third diameter.
12. The system of claim 9 , wherein each end of the opposite ends of the seal is tapered.
13. The system of claim 9 , wherein the seal is configured to engage with the radially expansible prosthetic heart valve when the radially expansible prosthetic heart valve is in an expanded state inside the at least two adjacent coils.
14. An anchor for docking a prosthetic heart valve at a native heart valve, the anchor comprising:
at least three coils including a first coil, a second coil, and a third coil, the second coil disposed between the first coil and the third coil, wherein a diameter of the first coil is larger than a diameter of the second coil; and
a seal circumscribing at least a portion of the second coil and having opposite ends that are spaced away from corresponding opposite ends of the at least three coils, wherein the seal is configured to slide along at least the portion of the second coil of the anchor.
15. The anchor of claim 14 , wherein the first coil is configured to be positioned below an annulus of a native mitral valve in a left ventricle, and wherein the third coil is configured to be positioned above the annulus of the native mitral valve in a left atrium.
16. The anchor of claim 14 , wherein the seal comprises a compressible material.
17. The anchor of claim 14 , wherein one of a distal end of the opposite ends of the seal or a proximal end of the opposite ends of the seal is tapered.
18. The anchor of claim 14 , wherein each end of the opposite ends of the seal is tapered.