Tissue shaping device
Devices for treating mitral valve regurgitation, including a distal expandable anchor, a proximal expandable anchor, and a fixed length connecting member extending from the proximal expandable anchor to the distal expandable anchor, where at least one of the proximal and distal anchors includes first and second arm segments that extend from one end of the device toward the connecting member and the other anchor when in a collapsed delivery configuration, and where the at least one of the proximal and distal anchors that comprises the first and second arm segments has an expanded configuration in which the first and second arm segments extend radially outwardly such that the first and second arm segments extend away from one another toward the connector, and meet one another at a location axially spaced from the end of the device.
1. A method of orienting an intraluminal cardiac device within the coronary sinus for the treatment of mitral valve regurgitation, the method comprising:
advancing an intraluminal cardiac device in a collapsed configuration into a coronary sinus, the intraluminal cardiac device comprising a first expandable anchor, a second expandable anchor, and a connecting member extending between the first and second expandable anchors, the connecting member predisposed with a curved configuration;
expanding the first expandable anchor within the coronary sinus;
anchoring the first expandable anchor against movement in the coronary sinus;
deploying the connecting member such that at least a portion of the curved configuration of the connecting member generally corresponds to the curved shape of the coronary sinus and such that the connecting member is disposed on the inside curve of the coronary sinus;
pulling proximally on the intraluminal cardiac device so as to change the geometry of the mitral valve annulus and bring the leaflets of the mitral valve closer together, thereby reducing undesirable blood flow regurgitation back through the mitral valve during the heart cycle;
expanding the second expandable anchor within the coronary sinus; and
anchoring the second expandable anchor against movement in the coronary sinus after the pulling step,
wherein expanding the first expandable anchor comprises moving an apex of the first expandable anchor, relative to the connecting member, radially outward and away from the connecting member and away from the inside curve of the coronary sinus.
2. The method of claim 1 wherein the first expandable anchor is a distal expandable anchor, and wherein anchoring the distal expandable anchor against movement in the coronary sinus comprises anchoring the distal anchor such that the apex of the distal expandable anchor is facing away from the inside curve of the coronary sinus.
3. The method of claim 2 , wherein expanding the distal anchor further comprises causing first and second arm segments of the distal anchor to expand radially outward and away from the inside curve of the coronary sinus.
4. The method of claim 1 wherein the first expandable anchor is a proximal anchor, and wherein anchoring the proximal expandable anchor against movement in the coronary sinus comprises anchoring the proximal anchor such that the apex of the proximal expandable anchor is facing away from the inside curve of the coronary sinus.
5. The method of claim 4 wherein expanding the proximal anchor further comprises causing first and second arm segments of the proximal anchor to expand radially outward and away from the inside curve of the coronary sinus.