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 method for treating cardiac disease of a patient's heart, said method comprising:
surgically accessing said patient's heart;
placing a cardiac restraining device around said heart, said cardiac restraining device comprising a jacket and an adjustment mechanism; wherein said jacket is constructed of a flexible material and defines an internal volume between an open upper end and a lower end;
adjusting said jacket on said heart to snugly conform to an external geometry of said heart and constrain circumferential expansion of said heart during diastole and permitting unimpeded contraction of said heart during systole;
surgically closing access to said heart while leaving said jacket in place on said heart;
adjusting said internal volume defined by said jacket after said jacket is in place on said heart using said adjustment mechanism; and
reducing a size of said heart by a method selected from the group consisting of LVAD and chronic pacing after said step of surgically closing access to said heart.
2. A method for treating cardiac disease of a patient's heart, said method comprising:
surgically accessing said patient's heart;
placing a cardiac restraining device around said heart, said cardiac restraining device comprising a jacket and an adjustment mechanism; wherein said jacket is constructed of a flexible material and defines an internal volume between an open upper end and a lower end;
adjusting said jacket on said heart to snugly conform to an external geometry of said heart and constrain circumferential expansion of said heart during diastole and permitting unimpeded contraction of said heart during systole;
surgically closing access to said heart while leaving said jacket in place on said heart; and
adjusting said internal volume defined by said jacket after said jacket is in place on said heart using said adjustment mechanism
reducing a size of said heart using a LVAD prior to placing said cardiac restraining device around said heart.
3. A method for treating cardiac disease of a patient's heart, said method comprising:
surgically accessing said patient's heart;
placing a cardiac restraining device around said heart, said cardiac restraining device comprising a jacket and an adjustment mechanism; wherein said jacket is constructed of a flexible material and defines an internal volume between an open upper end and a lower end;
adjusting said jacket on said heart to snugly conform to an external geometry of said heart and constrain circumferential expansion of said heart during diastole and permitting unimpeded contraction of said heart during systole;
surgically closing access to said heart while leaving said jacket in place on said heart; and
adjusting said internal volume defined by said jacket after said jacket is in place on said heart using said adjustment mechanism
reducing a size of said heart by chronic pacing prior to placing said cardiac restraining device around said heart.