Telescoping prosthetic valve with retention element

1. A prosthetic valve comprising:

a leaflet frame defining a tubular shape and having a wall extending from a leaflet frame inflow end and a leaflet frame outflow end, the leaflet frame defining a leaflet frame lumen, the leaflet frame including a leaflet construct;

an anchor frame defining a tubular shape and having an anchor frame inflow end and an anchor frame outflow end, the anchor frame defining an anchor frame lumen; and

an outflow annular groove cover having a first end coupled to the anchor frame outflow end and a second end coupled to the leaflet frame outflow end, wherein the outflow annular groove cover is operable to maintain a relative position of the leaflet frame within the anchor frame lumen by virtue of an elastic bias when the prosthetic valve is in a deployed, nested configuration.

2. The prosthetic valve of claim 1 , wherein the elastic bias is configured to center the leaflet frame within the anchor frame under physiologic loading conditions.

3. The prosthetic valve of claim 1 , wherein the elastic bias is configured to permit resilient deflection of the leaflet frame within the anchor frame lumen to accommodate physiologic loading.

4. A prosthetic valve comprising:

a leaflet frame defining a tubular shape and having a wall extending between a leaflet frame inflow end and a leaflet frame outflow end, the leaflet frame defining a leaflet frame lumen and including a valve construct;

an anchor frame defining a tubular shape and having an anchor frame inflow end and an anchor frame outflow end, the anchor frame defining an anchor frame lumen; and

an outflow annular groove cover having a first end coupled to the anchor frame outflow end and a second end coupled to the leaflet frame outflow end, wherein the outflow annular groove cover is operable to transition between an extended configuration and a retracted configuration and is biased toward the retracted configuration.

5. The prosthetic valve of claim 4 , wherein the outflow annular groove cover resists forces in opposition to the outflow annular groove cover being biased toward the retracted configuration.

6. The prosthetic valve of claim 4 , wherein the outflow annular groove cover is resiliently retractable and extendible, such that the outflow annular groove cover is operable to be transitioned between the extended configuration and the retracted configuration due to an elastic bias.

7. The prosthetic valve of claim 6 , wherein the outflow annular groove cover has a flatter shape in the retracted configuration compared to the extended configuration.

8. A prosthetic valve comprising:

a leaflet frame defining a tubular shape and having a wall extending from a leaflet frame inflow end and a leaflet frame outflow end, the leaflet frame defining a leaflet frame lumen, the leaflet frame including a leaflet construct;

an anchor frame defining a tubular shape and having an anchor frame inflow end and an anchor frame outflow end, the anchor frame defining an anchor frame lumen; and

an outflow annular groove cover extending from the anchor frame outflow end and the leaflet frame outflow end, wherein:

the outflow annular groove cover is operable to maintain a relative position of the leaflet frame within the anchor frame lumen by virtue of an elastic bias when the prosthetic valve is in a deployed, nested configuration;

the outflow annular groove cover is operable to transition between an extended configuration and a retracted configuration and is biased toward the retracted configuration; and

the outflow annular groove cover has a first end coupled to the anchor frame outflow end and a second end coupled to the leaflet frame outflow end.

9. The prosthetic valve of claim 8 , wherein the outflow annular groove cover is operable to cover and restrict fluid flow into and out from an outflow annular groove when the prosthetic valve is in a deployed, nested configuration.

10. The prosthetic valve of claim 8 , wherein the outflow annular groove cover is blood permeable in a delivery configuration.

11. The prosthetic valve of claim 8 , wherein the outflow annular groove cover is configured to be less permeable to blood when the prosthetic valve is in a deployed, nested configuration compared to when the prosthetic valve is not in the deployed, nested configuration.

12. The prosthetic valve of claim 8 , wherein the elastic bias is configured to center the leaflet frame within the anchor frame lumen when the prosthetic valve is in a deployed, nested configuration.

13. The prosthetic valve of claim 8 , wherein when the prosthetic valve is in a delivery configuration, the outflow annular groove cover is elastically restrained in an extended tubular configuration.

14. The prosthetic valve of claim 8 , wherein the outflow annular groove cover is a flexible elastic element operable to resiliently stow into a low radial profile when the prosthetic valve is in a delivery configuration.

15. The prosthetic valve of claim 8 , wherein the outflow annular groove cover forms a wall that has a lower angle relative to a longitudinal axis of the prosthetic valve when the prosthetic valve is in a delivery configuration compared to when the prosthetic valve is in a deployed, nested configuration.

16. The prosthetic valve of claim 8 , wherein the outflow annular groove cover, together with a connecting sheath that couples the leaflet frame to the anchor frame, defines a closed volume.

17. The prosthetic valve of claim 8 , wherein the outflow annular groove cover is coupled to the leaflet frame about an outflow edge of a leaflet frame cover.

18. The prosthetic valve of claim 8 , wherein the outflow annular groove cover is formed from a retracted microstructure membrane.

19. The prosthetic valve of claim 18 , wherein the retracted microstructure membrane is a porous synthetic fluoropolymer membrane defining pores and an elastomer or elastomeric material filling the pores.