Adjustable tether and epicardial pad system for prosthetic heart valve
Apparatus and methods are described herein for repositioning a tether attached to a prosthetic heart valve. In some embodiments, a method includes inserting a distal end portion of a snare device through an incision at a first location in a ventricular wall of a heart and within the left ventricle of the heart. A tether extending from a prosthetic mitral valve, through the left ventricle and out an incision at a second location on the ventricular wall of the heart is snared with the snare device. The tether is pulled with the snare device such that a proximal end of the tether is moved back through the incision at the second location on the ventricular wall and into the left ventricle. The snare device is pulled proximally such that the tether is pulled proximally through the incision at the first location in the ventricular wall of the heart.
1. A method, comprising:
inserting a distal end portion of a catheter through an incision at a first location in a ventricular wall of a heart, through a left ventricle of the heart and through an incision at a second location in the ventricular wall while a proximal end of the catheter remains outside the incision at the first location and such that a distal end portion of the catheter is disposed at least partially parallel to a tether extending through the incision at the second location in the ventricular wall, the tether coupled at a distal end to a prosthetic mitral valve implanted within the heart;
threading at least a proximal end portion of the tether through a lumen defined by the catheter until a proximal end of the tether extends out of a proximal end of the catheter outside of the heart; and
pulling the catheter proximally such that the distal end portion of the catheter extends within the left ventricle of the heart with the tether extending through the lumen of the catheter outside of the heart; and
adjusting a tension on the tether between the prosthetic mitral valve and the incision at the first location in the ventricular wall of the heart.
2. The method of claim 1 , wherein:
the threading the tether includes moving a snare device distally through the lumen of the catheter until a distal end of the snare device exits the distal end of the catheter outside of the heart,
snaring with the snare device a portion of the tether extending outside of the heart; and
pulling the tether with the snare device into the lumen of the catheter and out a proximal end of the catheter outside of the heart.
3. The method of claim 1 , wherein:
the threading the tether includes manually inserting the proximal end of the tether into the lumen of the catheter and threading the tether through the lumen of the catheter until the proximal end of the tether extends out the proximal end of the catheter outside of the heart.
4. The method of claim 1 , further comprising:
securing the tether at the first location on the ventricular wall of the heart with an epicardial pad device.
5. The method of claim 1 , further comprising:
prior to the adjusting the tension on the tether, removing the catheter from the heart leaving the tether extending through the incision at the first location in the ventricular wall of the heart.
6. The method of claim 1 , further comprising:
after the adjusting the tension on the tether, removing the catheter from the heart leaving the tether extending through the incision at the first location in the ventricular wall of the heart.
7. The method of claim 1 , wherein the catheter is flexible such that the catheter can bend to extend between the incision at the first location in the ventricular wall of the heart and the incision at the second location in the ventricular wall of the heart.
8. The method of claim 1 , wherein the catheter includes a bend formed in the catheter such that the catheter can extend between the incision at the first location in the ventricular wall of the heart and the incision at the second location in the ventricular wall of the heart.