Atrial appendage closure device and related methods
An atrial appendage closure device is provided that includes an occluding portion having a distal surface and a proximal surface opposite the distal surface, the occluding portion being moveable between a retracted position and a deployed position such that, in the deployed position, the occluding portion is configured to provide a seal between a left atrial appendage and a left atrium of a heart. An anchoring portion is operably connected to the occluding member with the anchoring portion being moveable between a retracted position and a deployed position. Methods for occluding a left atrial appendage that make use of the closure devices are also provided.
1. A method of occluding a left atrial appendage of a heart, comprising:
positioning in the left atrial appendage (LAA) a closure device including an occluding portion and an anchoring portion, wherein the occluding portion has a distal surface and a proximal surface opposite the distal surface, wherein the occluding portion is moveable between a closed retracted position and a deployed position;
securing the anchoring portion to an inside wall of the LAA;
deploying the occluding portion inside a left atrium of the heart such that the occluding portion provides a seal between the LAA and the left atrium of the heart; and
moving one or more elements of the anchoring portion and the occluding portion towards one another so as to shrink or collapse a volume defined by the LAA.
2. The method of claim 1 , further comprising a step of securing the anchoring portion to the occluding portion.
3. The method of claim 1 , wherein the step of securing the anchoring portion to the inside wall of the LAA is performed while the occluding portion is in the closed position.
4. The method of claim 1 , wherein the step of securing the anchoring portion to the inside wall of the LAA is performed while the occluding portion is in the deployed position.
5. The method of claim 1 , wherein the anchoring portion has a proximal end connected to the proximal surface of the occluding portion and a distal end positioned away from the proximal surface of the occluding portion, and wherein the step of securing the anchoring portion to the inside wall of the LAA comprises screwing the distal end of the anchoring portion into the inside wall of the LAA.
6. The method of claim 1 , wherein the inside wall of the LAA to which the anchoring portion is secured is opposite an orifice between the LAA and the left atrium and wherein the step of moving comprises pulling the anchoring portion towards the orifice between the LAA and the left atrium until the inside wall of the LAA is positioned adjacent to the orifice.
7. The method of claim 1 , wherein said percutaneously positioning step includes using a transseptal approach via a femoral vein of a subject.
8. The method of claim 7 , wherein, during the step of percutaneously positioning, the closure device is positioned within a catheter with the occluding portion and the anchoring portion both in the closed position.
9. The method of claim 8 , wherein the step of deploying the occluding portion inside the left atrium comprises removing the occluding portion from the catheter.
10. The method of claim 8 , wherein the anchoring portion is movable between a closed position and a deployed position, and the method further comprises a step of deploying the anchoring portion inside the LAA of the heart before securing the anchoring portion to the inside wall of the LAA.
11. The method of claim 1 , wherein the step of securing the anchoring portion to the inside wall of the LAA comprises deploying the anchoring member within the LAA, and wherein the step of moving comprises drawing together the anchoring portion and the occluding portion.
12. The method of claim 7 , wherein the step of deploying the anchoring portion inside the LAA comprises removing the anchoring portion from a catheter.