Fixed anchor and pull mitral valve device and method
Methods of treating mitral valve regurgitation, including causing a distal expandable anchor to self-expand within a coronary sinus, anchoring the distal expandable anchor against movement in the coronary sinus, changing the geometry of a mitral valve annulus, causing a proximal expandable anchor to self-expand within the coronary sinus, anchoring the proximal expandable anchor against movement within the coronary sinus, and withdrawing the delivery system from the coronary sinus.
1. A method of minimally-invasively treating mitral valve regurgitation, the method comprising:
advancing a delivery system to a patient's coronary sinus, the delivery system comprising a delivery device and a catheter;
advancing a collapsible intraluminal cardiac device in a collapsed configuration through a lumen of the catheter into the coronary sinus with the delivery device releasably secured to a proximal end of the intraluminal cardiac device, the intraluminal cardiac device comprising a distal expandable anchor, a proximal expandable anchor, and a fixed length connecting member extending between the distal and proximal expandable anchors;
retracting the catheter proximally within the coronary sinus to cause the distal expandable anchor to self-expand within the coronary sinus;
anchoring the distal expandable anchor against movement in the coronary sinus;
pulling proximally on the delivery device and the intraluminal cardiac device such that the connecting member is disposed on an inside curve of the coronary sinus so as to change the geometry of the mitral valve annulus, bringing the leaflets of the mitral valve closer together, thereby reducing undesirable blood flow regurgitation of the mitral valve during the heart cycle;
retracting the catheter proximally within the coronary sinus to cause the proximal expandable anchor to self-expand within the coronary sinus;
anchoring the proximal expandable anchor against movement within the coronary sinus to substantially secure the mitral valve annulus in the changed geometry; and
releasing the proximal end of the intraluminal device from the delivery device and withdrawing the delivery system from the coronary sinus,
wherein, when anchored in the coronary sinus, at least one of the distal and proximal expandable anchors includes an apex that is extended radially outward and away from the connecting member and from the inside curve of the coronary sinus.
2. The method of claim 1 , wherein pulling proximally on the delivery device occurs prior to self-expansion of the proximal anchor.
3. The method of claim 1 , wherein self-expansion of the proximal anchor within the coronary sinus occurs prior to the step of proximally pulling on the delivery device.