Valve leaflet treatment systems and methods

An apparatus for use with a valve disposed between an atrium and a ventricle of a heart of a subject, the valve having a first leaflet and a second leaflet, and the apparatus comprising an implant that comprises:

• a leaflet-augmentation patch comprising:
• a flexible sheet, and
• a frame that supports the flexible sheet and defines a spring;
• a patch anchor;
• and
• a cord, coupling the patch anchor to the patch in a manner in which anchoring the patch anchor to the first leaflet positions the patch to coapt with the second leaflet during ventricular systole, the spring being configured to tension the cord.