Percutaneous mitral annuloplasty with cardiac rhythm management
View Patent ↗An implantable device is positioned within the coronary sinus and tightened around the mitral annulus to reduce mitral valve regurgitation. The device carries at least one electrode, in electronic communication with a cardiac rhythm management device.
1. A medical apparatus, for remodeling a mitral valve annulus of a patient adjacent to a coronary sinus, comprising:
an elongate body sized and configured to be implanted, along a delivery device, at least partially within the coronary sinus of the patient;
a forming element that changes the elongate body between a first shape and a second shape such that, when implanted in the coronary sinus and in the second shape, the elongate body has a best fit curve of constant radius within a range of from about 1.0 cm to about 2.0 cm and is sized and shaped to change a shape of the mitral valve annulus by exerting a force against a wall of the coronary sinus sufficient to influence the size of the mitral valve annulus; and
a cardiac pacing electrode, carried by the elongate body, the electrode being configured to remain with the elongate body after the forming element changes the elongate body to the second shape and after the delivery device is entirely removed from the patient.
2. The medical apparatus of claim 1 , wherein the elongate body is movable from the first shape to the second shape in response to relative movement between the forming element and the elongate body.
3. The medical apparatus of claim 1 , wherein the elongate body is arcuate when in the second shape.
4. The medical apparatus of claim 1 , wherein the elongate body is configured to remain in the second shape after the delivery device is removed from the patient.
5. The medical apparatus of claim 4 , further comprising a lock that retains the elongate body in the second shape after the delivery device is removed from the patient.
6. The medical apparatus of claim 1 , wherein the elongate body comprises a proximal portion and a distal portion such that when implanted in the coronary sinus, the proximal portion is closer to the ostium of the coronary sinus than is the distal portion, and the forming element is coupled with the elongate body at the distal portion.
7. The medical apparatus of claim 6 , wherein the forming element remains coupled with the elongate body at the point of attachment after the delivery device is entirely removed from the patient.