Cardiac disease treatment and device
A cardiac constraint device comprising a jacket of biological compatible material and an adjustment member. The jacket is adapted to be secured to the heart to snugly conform to an external geometry of the heart and assume a maximum adjusted volume to constrain circumferential expansion of the heart beyond the maximum adjusted volume during diastole and to permit unimpeded contraction of the heart during systole. The adjustment mechanism is configured to alter the internal volume defined by the jacket after the jacket is secured to the heart. The invention also provides a method for treating cardiac disease.
1. A cardiac constraint device for treating disease of a heart comprising:
a jacket of flexible material having an internal surface and an outer surface, the jacket defining an volume between an open upper end and a lower end;
said jacket adapted to be secured to said heart to snugly conform to an external geometry of said heart and to constrain circumferential expansion of said heart during diastole and permit substantially unimpeded contraction of said heart during systole;
at least one stay element circumferentially surrounds the jacket; and
at least one adjustment mechanism affixed to internal surface of said jacket and wrapped around by the at least one stay element, wherein said adjustment mechanism is capable of altering said internal volume defined by said jacket after said jacket is secured to said heart, wherein said adjustment mechanism comprises a balloon catheter capable of expansion;
wherein as the balloon catheter expands, a tension of the at least one stay element increases.
2. The device according to claim 1 , wherein the balloon catheter is positioned circumferentially along the internal surface of the jacket.
3. The device according to claim 1 , wherein the balloon catheter is positioned in a pre-determined location on the internal surface of the jacket.
4. The device according to claim 1 , wherein the internal volume is adjustable prior to, during, or after attachment of the device to the heart.
5. The device according to claim 1 , wherein the material of the jacket is less than 1mm thick.
6. The device according to claim 1 , wherein the stay element is configured to provide adjustable tension while the device is secured to the heart.
7. The device according to claim 1 , further comprising a receptacle disposed on the outer surface of the jacket and configured to receive the at least one stay element, and wherein the at least one stay element is positioned within the receptacle.
8. The device according to claim 7 , wherein the at least one stay element and the receptacle are non-biodegradable.
9. The device according to claim 1 , further comprising one or more additional stay elements, wherein each stay element of the device is disposed internal to an associated receptacle disposed on the outer surface of the jacket and configured to receive an associated stay element, and wherein each stay element is positioned within an associated receptacle.
10. The device according to claim 9 , wherein the stay elements and the receptacles are non-biodegradable.