Valve prosthesis configured for deployment in annular spacer

1. A prosthetic heart valve, comprising:

an annular spacer configured to engage a native heart valve, the annular spacer comprising:

a cylindrical skirt having an upstream end and a downstream end opposite from the upstream end, wherein a spacer opening extends through the cylindrical skirt between the upstream end and downstream end thereof, and

a disc-shaped wall situated about a portion of the cylindrical skirt and extending radially outward from the cylindrical skirt; and

a central valve section configured for disposal within the spacer opening of the annular spacer, the central valve section having:

a hollow valve section body configured to support a valve prosthesis therein, and

at least one anchoring protrusion configured to extend radially outward from the valve section body, the at least one anchoring protrusion being configured to prevent the central valve section from moving axially relative to the annular spacer,

wherein the central valve section is configured to:

expand radially within the heart from a delivery configuration into an at least partially-expanded configuration while at least a portion of the central valve section is situated outside of the spacer opening of the annular spacer, and

move into the spacer opening, while the central valve section remains in the at least partially-expanded configuration, until the at least one anchoring protrusion contacts the downstream end of the cylindrical skirt, and

wherein the cylindrical skirt of the annular spacer is configured to be inverted such that a first end of the cylindrical skirt is situated upstream of the disc-shaped wall after deployment of the annular spacer within the native heart valve, the first end of the cylindrical skirt being the downstream end of the cylindrical skirt when the cylindrical skirt is in a non-inverted configuration.

2. The prosthetic heart valve of claim 1 , wherein

the disc-shaped wall of the annular spacer is situated about the upstream end of the cylindrical skirt, and

the at least one anchoring protrusion is connected to a downstream end of the valve section body.

3. The prosthetic heart valve of claim 1 , wherein

the disc-shaped wall of the annular spacer is configured to contact an atrial side of the native heart valve and to secure the central valve section relative to an annulus of the native heart valve, and

the cylindrical skirt of the annular spacer is configured to extend at least partially into a ventricle of the heart.

4. The prosthetic heart valve of claim 1 , wherein the at least one anchoring protrusion is configured to extend through the downstream end of the spacer opening.

5. The prosthetic heart valve of claim 1 , wherein the disc-shaped wall comprises:

a support stent having a plurality of struts, and

a covering arranged upon the support stent, the covering being configured to obstruct blood flow.

6. The prosthetic heart valve of claim 1 ,

wherein the valve section body includes a flexible wire frame formed at least partially of a plurality of struts intersecting at strut junctions, and

wherein when the central valve section is disposed within the spacer opening of the annular spacer, at least one strut junction of the flexible wire frame is situated in an upstream direction from the upstream end of the cylindrical skirt.

7. The prosthetic heart valve of claim 6 , wherein the at least one anchoring protrusion is connected to a strut junction along a downstream end of the flexible wire frame.

8. The prosthetic heart valve of claim 1 , wherein the at least one anchoring protrusion is configured to extend radially outward beyond an outer diameter of the downstream end of the cylindrical skirt when the central valve section is disposed within the spacer opening of the annular spacer.

9. The prosthetic heart valve of claim 1 , wherein the central valve section has a greater axial length than the annular spacer.

10. A prosthetic heart valve, comprising:

an annular spacer configured to engage a native heart valve, the annular spacer comprising:

a cylindrical skirt having an upstream end and a downstream end opposite from the upstream end, wherein a spacer opening extends through the cylindrical skirt between the upstream end and downstream end thereof, and

a disc-shaped wall situated about a portion of the cylindrical skirt and extending radially outward from the cylindrical skirt,

wherein the cylindrical skirt is configured to be inverted such that a first end of the cylindrical skirt is situated upstream of the disc-shaped wall after deployment of the annular spacer within the native heart valve, the first end of the cylindrical skirt being the downstream end of the cylindrical skirt when the cylindrical skirt is in a non-inverted configuration; and

a central valve section configured for disposal within the spacer opening of the annular spacer, the central valve section having:

a hollow valve section body configured to support a valve prosthesis therein, and

at least one anchoring protrusion configured to extend radially outward from the valve section body, the at least one anchoring protrusion being configured to prevent the central valve section from moving axially relative to the annular spacer,

wherein the central valve section is configured for deployment into the heart separately from the annular spacer.

11. The prosthetic heart valve of claim 10 , wherein

the disc-shaped wall of the annular spacer is situated about the upstream end of the cylindrical skirt, and

the at least one anchoring protrusion is connected to a downstream end of the valve section body.

12. The prosthetic heart valve of claim 10 , wherein

the disc-shaped wall of the annular spacer is configured to contact an atrial side of the native heart valve and to secure the central valve section relative to an annulus of the native heart valve, and

the cylindrical skirt of the annular spacer is configured to extend at least partially into a ventricle of the heart.

13. The prosthetic heart valve of claim 10 , wherein the at least one anchoring protrusion is configured to extend through the downstream end of the spacer opening.

14. The prosthetic heart valve of claim 10 , wherein the disc-shaped wall comprises:

a support stent having a plurality of struts, and

a covering arranged upon the support stent, the covering being configured to obstruct blood flow.

15. The prosthetic heart valve of claim 10 ,

wherein the valve section body includes a flexible wire frame formed at least partially of a plurality of struts intersecting at strut junctions, and

wherein when the central valve section is disposed within the spacer opening of the annular spacer, at least one strut junction of the flexible wire frame is situated in an upstream direction from the upstream end of the cylindrical skirt.

16. The prosthetic heart valve of claim 15 , wherein the at least one anchoring protrusion is connected to a strut junction along a downstream end of the flexible wire frame.

17. The prosthetic heart valve of claim 10 , wherein the at least one anchoring protrusion is configured to extend radially outward beyond an outer diameter of the downstream end of the cylindrical skirt when the central valve section is disposed within the spacer opening of the annular spacer.

18. The prosthetic heart valve of claim 10 , wherein the central valve section has a greater axial length than the annular spacer.

19. The prosthetic heart valve of claim 10 , wherein the central valve section is configured to:

expand radially within the heart from a delivery configuration into a deployed configuration while the central valve section is situated outside of the spacer opening of the annular spacer, and

move into the spacer opening, while the central valve section remains in the deployed configuration, until the at least one anchoring protrusion contacts the downstream end of the cylindrical skirt.