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 defining an internal 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; and
an adjustment mechanism affixed to said jacket, wherein said adjustment mechanism is capable of altering said internal volume defined by said jacket after said jacket is secured to said heart and comprises a band of elastic material.
2. A device according to claim 1 wherein said band of elastic material is oriented vertically.
3. A device according to claim 1 wherein said band of elastic material comprises horizontally oriented elastic rods.
4. A device according to claim 1 wherein said band of elastic material comprises a unitary elastic panel.