Methods and devices for accessing and delivering devices to a heart
View Patent ↗Described here are devices and systems for accessing and delivering devices to a heart. The left atrial appendage may be used as an access port to allow pericardial access to internal structures of the heart. Systems that may be used to provide access to the heart via the left atrial appendage may comprise a first access element with a first alignment member, a second access element with a second alignment member, a piercing element, and an exchange element. A piercing element may be advanced to pierce the wall of the left atrial appendage to form an access site therethrough. Optionally, an exchange element may be advanced to initiate a track between the inside and outside of the left atrial appendage, which may be used for device delivery. Some systems may further comprise a left atrial appendage stabilization device.
1. A method for cardiac valve treatment via a left atrial appendage, the method comprising:
advancing a first guide intravascularly to an interior of the left atrial appendage, wherein the first guide comprises a first longitudinal lumen therethrough and a first magnet;
advancing a second guide through the pericardium to an exterior of the left atrial appendage, wherein the second guide comprises a second longitudinal lumen therethrough and a second magnet;
aligning the first and second guides using the first and second magnets such that the first longitudinal lumen is aligned with the second longitudinal lumen and homeostasis is maintained between the magnets;
advancing a piercing element through the left atrial appendage through the first and second longitudinal lumens to access a cardiac valve site;
advancing a guide element through the first and second longitudinal lumens;
advancing a treatment device along the guide element into the heart through the left atrial appendage to the cardiac valve site;
repairing or replacing the cardiac valve with the treatment device;
removing the treatment device through the left atrial appendage; and
advancing a closure device to the left atrial appendage; and
closing the left atrial appendage with the closure device.
2. The method of claim 1 wherein the treatment device comprises a cardiac valve repair device.
3. The method of claim 2 wherein the valve repair device comprises an annuloplasty band or ring.
4. The method of claim 2 wherein the valve repair device comprises a chordae tendinae replacement device.
5. The method of claim 1 wherein the treatment device comprises a cardiac valve replacement device.
6. The method of claim 1 , further comprising advancing a suture device into the heart through a left ventricle access site.
7. The method of claim 1 wherein the cardiac valve is a mitral valve.
8. The method of claim 1 wherein the cardiac valve is a tricuspid valve.
9. The method of claim 1 wherein the cardiac valve is a semilunar valve.
10. The method of claim 1 wherein closing the left atrial appendage comprises ligating the left atrial appendage with a suture loop.
11. The method of claim 1 wherein closing the left atrial appendage comprises occluding the left atrial appendage with an expandable member.
12. The method of claim 1 wherein the closure device comprises a closure element forming a loop and a suture loop.
13. The method of claim 12 wherein the suture loop is releasably connected to the closure element.
14. The method of claim 1 further comprising advancing a guide element intravascularly into the left ventricle to assist in cardiac valve treatment.
15. The method of claim 1 further comprising stabilizing the left atrial appendage with the closure device before the repairing step.
16. The method of claim 15 wherein the closure device comprises a closure element forming a loop and a suture loop, and wherein stabilizing the left atrial appendage with the closure device comprises closing the closure element around the left atrial appendage to help maintain homeostasis.
17. The method of claim 16 further comprising reopening the closure element to allow the treatment device to advance therethrough and reclosing the closure element around the treatment device to help maintain homeostasis.
18. The method of claim 1 wherein a clamp connects the piercing element and the guide element.
19. The method of claim 1 further comprising expanding a balloon in the left atrial appendage to assist in closing the left atrial appendage near an ostium of the left atrial appendage.
20. The method of claim 1 wherein the first and second guides are aligned linearly end-to-end.