Cardiac support device with anti-fibrosis lining
A jacket of biological compatible material has an internal volume dimensioned for an apex of the heart to be inserted into the volume and for the jacket to be slipped over the heart. The jacket has a longitudinal dimension between upper and lower ends sufficient for the jacket to surround a lower portion of the heart with the jacket surrounding a valvular annulus of the heart and further surrounding the lower portion to cover at least the ventricular lower extremities of the heart. The jacket is adapted to be secured to the heart with the jacket surrounding at least the valvular annulus and the ventricular lower extremities. The jacket is adjustable on the heart to snugly conform to an external geometry of the heart and assume a maximum adjusted volume for the jacket to constrain circumferential expansion of the heart beyond the maximum adjusted volume during diastole and to permit unimpeded contraction of the heart during systole.
1. A device for treating a disease of a heart, the device comprising:
a jacket of flexible material having open cells, wherein said jacket is adapted to be placed on said heart and to snugly conform to an external geometry of said heart to constrain circumferential expansion of said heart during diastole and permit substantially unimpeded contraction of said heart during systole; and
an anti-fibrosis lining.
2. The device according to claim 1 , wherein anti-fibrosis lining is placed between the heart and the jacket.
3. The device according to claim 1 , wherein said anti-fibrosis lining comprises PTFE.
4. The device according to claim 1 , wherein said jacket material is selected from any of polyester, polytetrafluoroethylene (PTFE), expanded PTFE (ePTFE), polypropylene and a metal.
5. A device according to claim 4 wherein said metal is stainless steel.
6. Thc device according to claim 1 , wherein said jacket is configured to constrain a lower portion of the heart.
7. The device according to claim 1 , wherein said jacket is sized to circumferentially surround said heart.
8. The device according to claim 1 , wherein said jacket material comprises interwoven fiber strands.
9. The device according to claim 1 , wherein said jacket material comprises a knit.
10. A device according to claim 1 wherein said jacket is adapted to constrain said heart from expanding beyond a maximum volume.
11. A device according to claim 1 wherein said lining is on a side of said jacket to oppose said heart.