Method and apparatus for closing off a portion of a heart ventricle
Apparatus and methods to reduce ventricular volume are disclosed. The device takes the form of a transventricular anchor assembly, which presses a portion of the ventricular wall inward, thereby reducing the available volume of the ventricle. The anchor assembly is deployed using a curved introducer that may be inserted into one ventricle, through the septum and into the opposite ventricle. Barbs or protrusions along a tension member of the anchor assembly combined with a mechanical stop and a sealing member hold the device in place once deployed.
1. An anchor device for treating a heart within a patient comprising:
a tension member;
a proximal anchor attached to a proximal end of the tension member;
a needle attached to a distal end of the tension member, the needle including a tissue penetrating tip configured to penetrate through external walls of the heart and be moved out of the heart; and
a second anchor configured to be slidably attached to the tension member;
wherein the tension member is configured to be tensioned after the needle penetrates the external walls of the heart to advance the second anchor along at least a portion of the length of the tension member into engagement with one of the external walls of the heart.
2. The anchor device of claim 1 , wherein the needle has a curved or arcuate configuration and wherein the needle is made of a more rigid material than the tension member.
3. The anchor device of claim 1 , wherein the needle is configured to be removable from the tension member after the tension member penetrates through the external walls of the heart.
4. The anchor device of claim 1 , wherein the proximal anchor is axially affixed and pivotably coupled to the tension member.
5. The anchor device of claim 4 , wherein the proximal anchor includes two or more arms.
6. A anchor device for treating a heart within a patient comprising:
a tension member;
an anchor attached to a proximal end of the tension member;
a needle attached to a distal end of the tension member, the needle including a tissue penetrating tip that is configured for penetrating through external walls of the heart; and
an additional anchor configured to be removably coupleable with the distal end of the tension member and slidable proximally along the tension member to engage an opposing external wall of the external walls of the heart to close a lower portion of the heart,
wherein the tension member couples the needle and the anchor, and the tension member is configured to be tensioned after the needle penetrates through the external walls of the heart to advance the anchor into engagement with one of the external walls of the heart.
7. The anchor device of claim 6 , wherein the tension member includes a plurality of protrusions that extend from a body of the tension member, and wherein the additional anchor is held in place by the plurality of protrusions.
8. The anchor device of claim 7 , wherein the plurality of protrusions are configured to engage heart tissue and hold the heart tissue in place.
9. The anchor device of claim 6 , wherein the additional anchor is slidable proximally along the tension member in a one way direction.
10. A method for applying an anchor to a heart comprising:
penetrating external walls of the heart via a needle of an anchor device, the anchor device further comprising a tension member and an anchor attached to a proximal end of the tension member, wherein the needle is attached to a distal end of the tension member;
pulling the needle through the external walls of the heart to advance the anchor, via the tension member, toward the heart; and
engaging a first external wall of the external walls of the heart with the anchor.
11. The method of claim 10 , wherein the needle has a curved or arcuate configuration.
12. The method of claim 10 , wherein the anchor of the anchor device is pivotably coupled to the proximal end of the tension member.
13. The method of claim 10 , wherein the anchor includes two or more arms.
14. The method of claim 10 , wherein the anchor is a first anchor and wherein the method further comprises:
coupling a second anchor with the distal end of the tension member;
sliding the second anchor proximally along the tension member into engagement with a second external wall of the external walls which opposes the first external wall of the heart; and
applying tension to the first and second anchors, via the tension member, to bring the first external wall and the second external wall into apposition.
15. The method of claim 14 , further comprising removing the needle prior to coupling the second anchor with the distal end of the tension member.
16. The method of claim 14 , further comprising removing the needle subsequent to coupling the second anchor with the distal end of the tension member.
17. The method of claim 14 , wherein the second anchor is slidable proximally along the tension member in a one way direction.
18. The method of claim 14 , wherein the tension member includes a plurality of protrusions that extend from a body of the tension member, and wherein the second anchor is held in place by the plurality of protrusions.
19. The method of claim 18 , further comprising engaging heart tissue with the plurality of protrusions to hold the heart tissue in place via the plurality of protrusions.
20. The method of claim 10 , wherein penetrating the external walls of the heart comprises penetrating external walls of an apex of the heart.