Tissue shaping device

1. A method of modifying the geometry of a mitral valve, comprising

delivering a tissue shaping device to a coronary sinus;

deploying a distal anchor from a delivery device and into the coronary sinus to allow the expandable distal anchor to expand;

locking the distal anchor in a locked configuration;

applying a proximal cinching force to the distal anchor to reshape tissue;

while maintaining the proximal cinching force, deploying the proximal anchor from the delivery device to allow the proximal anchor to expand.

2. The method of claim 1 further comprising locking the proximal anchor in a locked configuration after allowing the proximal anchor to expand.

3. A tissue shaping device adapted to be disposed in a vessel near a patient's heart to reshape the patient's heart, the tissue shaping device comprising:

an expandable proximal anchor;

a proximal anchor lock adapted to lock the proximal anchor in an expanded configuration;

an expandable distal anchor;

a distal anchor lock adapted to lock the distal anchor in an expanded configuration; and

a connector disposed between the proximal anchor and the distal anchor, the connector having a substantially non-circular cross-section,

wherein the distal anchor lock comprises a bend in the connector.

4. The device of claim 3 wherein the distal anchor lock further comprises a compliant element adjacent the bend in the connector, the compliant element being adapted to change shape during a distal anchor locking operation.