Methods and devices for improving cardiac function in hearts
View Patent ↗Various methods and devices are disclosed for improving cardiac function in hearts having zones of infarcted (akinetic) and aneurysmal (dyskinetic) tissue regions. The methods and devices reduce the radius of curvature in walls of the heart proximal infarcted and aneurysmal regions to reduce wall stress and improve pumping efficiency. The inventive methods and related devices include splinting of the chamber wall proximal the infarcted region and various other devices and methods including suture and patch techniques.
1. A method of treating a heart valve, the method comprising:
providing a device having an elongate member, the elongate member having a first end and a second end;
positioning the elongate member transverse a heart chamber associated with the heart valve so as to reposition at least one leaflet associated with the heart valve,
wherein, when the elongate member is positioned transverse the heart chamber, the elongate member does not contact each of papillary muscles, leaflets, and an annulus associated with the heart valve; and
wherein the entire device is positioned solely above an apex of the heart and below an annulus associated with the heart valve.
2. The method of claim 1 , further comprising fixing the elongate member in position transverse the heart chamber.
3. The method of claim 2 , wherein fixing the elongate member in position includes fixing the elongate member via at least one anchoring mechanism configured to be secured to a wall surrounding the heart chamber.
4. The method of claim 3 , wherein the anchoring mechanism is configured to be secured to an exterior surface of the wall.
5. The method of claim 2 , wherein an anchoring mechanism is provided on each of the first end and the second end of the elongate member and fixing the elongate member in position includes securing the anchoring mechanisms to portions of a wall surrounding the heart chamber.
6. The method of claim 1 , wherein positioning the elongate member includes positioning the elongate member transverse a left ventricle of the heart.
7. The method of claim 1 , wherein the valve is a mitral valve.
8. The method of claim 1 , wherein positioning the elongate member transverse the heart chamber includes positioning the elongate member so as to avoid internal structures of the heart chamber.
9. The method of claim 1 , wherein providing the elongate member includes providing a tension member.
10. The method of claim 1 , further comprising reducing a radius of curvature in at least a region of the heart chamber.
11. The method of claim 10 , wherein reducing the radius of curvature in at least a region of the heart chamber includes reducing the radius of curvature at one of an aneurysmal and an infracted region of a wall surrounding the heart chamber.
12. A method of treating a heart valve, the method comprising:
providing a device configured to be implanted proximate the heart valve;
implanting the device such that a first portion of the device is positioned external to a heart chamber associated with the valve and closer to a first leaflet of the valve than to a second leaflet of the valve and such that a second portion of the device is positioned external to the heart chamber associated with the valve and closer to the second leaflet of the valve than the first leaflet of the valve; and
repositioning at least one of the first leaflet and the second leaflet of the valve,
wherein, when the device is implanted, the device does not contact each of papillary muscles, leaflets, and an annulus associated with the valve, and wherein the entire device is implanted solely above an apex of the heart and below an annulus associated with the heart valve.
13. The method of claim 12 , further comprising drawing the first and second leaflets toward each other.
14. The method of claim 12 , wherein the valve is a mitral valve.
15. The method of claim 12 , wherein implanting the device includes implanting the device such that the first portion contacts a wall of the heart.
16. The method of claim 15 , wherein implanting the device includes implanting the device such that the second portion contacts a wall of the heart.
17. The method of claim 16 , wherein the wall surrounds a left ventricle of the heart.
18. The method of claim 16 , wherein implanting the device includes implanting the device such that the second portion contacts an exterior surface of the wall of the heart.
19. The method of claim 15 , wherein implanting the device includes implanting the device such that the first portion contacts an exterior surface of the wall of the heart.
20. The method of claim 12 , wherein providing the device includes providing an elongate member.
21. The method of claim 20 , wherein providing the elongate member includes providing a tension member configured to extend transverse a chamber of the heart.
22. The method of claim 20 , wherein the elongate member has a first end and a second end and providing the device further includes providing an anchoring mechanism on each of the first end and the second end.
23. The method of claim 22 , wherein implanting the device further comprises engaging the anchoring mechanisms with a wall of the heart.
24. The method of claim 22 , wherein the first portion and the second portion of the device include the anchoring mechanisms.
25. A method of treating a heart valve having a first leaflet and a second leaflet, the method comprising:
providing a device configured to be implanted proximate the heart valve;
implanting the device such that a first portion of the device contacts heart structure located on a first side of a line defined by an intersection of the first leaflet and the second leaflet and such that a second portion of the device contacts heart structure located on a second side of the line opposite the first side; and
repositioning at least one of the first leaflet and the second leaflet of the valve,
wherein, when the device is implanted, the device does not contact each of papillary muscles, lealflets, and an annulus associated with the valve, and wherein the entire device is implanted solely above an apex of the heart and below an annulus associated with the heart valve.
26. The method of claim 25 , further comprising drawing the first leaflet and the second leaflet toward each other.
27. The method of claim 25 , wherein the valve is a mitral valve.
28. The method of claim 25 , wherein implanting the device includes implanting the device such that the first portion contacts a wall of the heart.
29. The method of claim 28 , wherein implanting the device includes implanting the device such that the second portion contacts a wall of the heart.
30. The method of claim 29 , wherein the wall surrounds a left ventricle of the heart.
31. The method of claim 29 , wherein implanting the device includes implanting the device such that the second portion contacts an exterior surface of the wall of the heart.
32. The method of claim 28 , wherein implanting the device includes implanting the device such that the first portion contacts an exterior surface of the wall of the heart.
33. The method of claim 25 , wherein providing the device includes providing an elongate member.
34. The method of claim 33 , wherein providing the elongate member includes providing a tension member configured to extend transverse a chamber of the heart.
35. The method of claim 33 , wherein the elongate member has a first end and a second end and providing the device further includes providing an anchoring mechanism on each of the first end and the second end.
36. The method of claim 35 , wherein implanting the device further comprises engaging the anchoring mechanisms with a wall of the heart.
37. The method of claim 35 , wherein the first portion and the second portion of the device include the anchoring mechanisms.