Mitral valve treatment techniques

A method for treating mitral valve regurgitation, comprising:

• inserting an implant including a band around between 90 and 270 degrees of a mitral valve of a heart, including around at least a portion of a posterior cusp of the valve, in a space defined by (a) a ventricular wall, (b) a ventricular surface of the posterior cusp in a vicinity of an annulus of the valve, and (c) a plurality of chordae tendineae of one or more types of chordae tendineae selected from the group consisting of:
• second-order chordae tendineae and third-order chordae tendineae, and by the inserting, contacting the band with one or more tissues selected from the group consisting of:
• one or more of the plurality of chordae tendineae and the ventricular surface of the posterior cusp;
• and
• supporting the posterior cusp by pressing the band against the posterior cusp, the plurality of chordae tendineae, and the ventricular wall, by inflating the band.