Transcatheter heart valves

1. A prosthetic heart valve comprising:

a collapsible and expandable support frame comprising a longitudinal axis, the frame comprising:

a first circumferential undulating structure defining an outflow end of the frame;

a second circumferential undulating structure spaced apart from the first circumferential undulating structure toward an inflow end of the frame; and

a plurality of struts longitudinally aligned with the longitudinal axis of the frame, and connecting the first circumferential undulating structure to the second circumferential undulating structure, each strut of the plurality of struts comprising:

a first end terminating at a trough of the first circumferential undulating structure, wherein the trough is defined between adjacent struts of a plurality of struts that form the first circumferential undulating structure and opens toward the inflow end of the frame; and

a second end terminating at a peak of the second circumferential undulating structure, wherein the peak is an apex of the second circumferential undulating structure disposed toward the outflow end of the frame,

wherein a segment of the support frame that extends between the first and second circumferential undulating structures includes a portion that consists of the plurality of longitudinally aligned struts; and

a biological tissue valve coupled to the frame,

wherein the prosthetic heart valve is configured to be collapsed for introduction into a patient using a catheter and to be expanded for deployment at an implantation site.

2. The prosthetic heart valve of claim 1 , further comprising a third circumferential undulating structure that is located axially between the first circumferential undulating structure and the second circumferential undulating structure and that is connected to the plurality of longitudinally aligned struts.

3. The prosthetic heart valve of claim 2 , wherein the third circumferential undulating structure is connected to intermediate portions of struts of the plurality of longitudinally aligned struts.

4. The prosthetic heart valve of claim 1 , wherein the frame is configured to be balloon expandable.

5. The prosthetic heart valve of claim 1 , wherein the frame comprises a shape memory material.

6. The prosthetic heart valve of claim 5 , wherein the shape memory material comprises a nickel-titanium alloy.

7. The prosthetic heart valve of claim 1 , wherein a portion of the prosthetic heart valve is configured to be positioned at a native cardiac ring upon implantation.

8. The prosthetic heart valve of claim 1 , wherein the biological tissue valve is coupled to the frame using sutures.

9. The prosthetic heart valve of claim 1 , wherein the frame is tubular.

10. The prosthetic heart valve of claim 1 , further comprising a sealing layer coupled to the frame and configured to conform to any surface irregularities at or near an existing cardiac ring.

11. A prosthetic heart valve comprising:

a collapsible and expandable support frame comprising a longitudinal axis, the frame comprising:

a first circumferential undulating structure defining an outflow end of the frame;

a plurality of struts longitudinally aligned with the longitudinal axis of the frame, each strut of the plurality of struts comprising a first end connected to a respective trough of the first circumferential undulating structure and a second end, wherein the respective trough is defined between adjacent struts of a plurality of struts that form the first circumferential undulating structure and opens toward an inflow end of the frame, and wherein troughs of the first circumferential undulating structure connected to respective first ends of struts of the plurality of struts are spaced from each other by at least one trough unconnected to a strut of the plurality of struts; and

a second circumferential undulating structure spaced apart from the first circumferential undulating structure toward the inflow end of the frame, and comprising a plurality of peaks, wherein a respective second end of each strut of the plurality of struts is connected to a respective peak of the plurality of peaks, wherein the respective peak is an apex of the second circumferential undulating structure disposed toward the outflow end of the frame,

wherein a segment of the support frame that extends between the first and second circumferential undulating structures includes a portion that consists of the plurality of longitudinally aligned struts; and

a biological tissue valve coupled to the frame,

wherein the prosthetic heart valve is configured to be collapsed for introduction into a patient using a catheter and to be expanded for deployment at an implantation site.

12. The prosthetic heart valve of claim 11 , further comprising a third circumferential undulating structure between the first circumferential undulating structure and the second circumferential undulating structure, and connected to the plurality of longitudinally aligned struts.

13. The prosthetic heart valve of claim 12 , wherein the third circumferential undulating structure is connected to intermediate portions of struts of the plurality of longitudinally aligned struts.

14. The prosthetic heart valve of claim 11 , wherein the frame is configured to be balloon expandable.

15. The prosthetic heart valve of claim 11 , wherein the frame comprises a shape memory material.

16. The prosthetic heart valve of claim 15 , wherein the shape memory material comprises a nickel-titanium alloy.

17. The prosthetic heart valve of claim 11 , wherein a portion of the prosthetic heart valve is configured to be positioned at a native cardiac ring upon deployment.

18. The prosthetic heart valve of claim 11 , wherein the biological tissue valve is coupled to the frame using sutures.

19. The prosthetic heart valve of claim 11 , wherein the frame is tubular.

20. The prosthetic heart valve of claim 11 , further comprising a sealing layer coupled to the frame and configured to seal the prosthetic heart valve.