Adjustable annuloplasty ring and delivery system

An adjustable mitral annuloplasty ring shaped for implant at the mitral annulus and delivery system, comprising:

• an annuloplasty ring having a peripheral shape around a central aperture, the peripheral shape being a rounded D-shape with a relatively straight anterior segment opposite an arcuate posterior segment, and with a shorter minor axis extending between the anterior and posterior segments and a longer major axis extending perpendicular to the minor axis and between side segments, the annuloplasty ring having an inner core formed of an elastic-plastic metal having a yield strength;
• a delivery system including a flexible sheath coupled to the inner core at a first side of the annuloplasty ring, the sheath housing a flexible cable configured to slide through the sheath, the cable passing through the first side of the annuloplasty ring and extending across the central aperture to a diametrically-opposed second side of the annuloplasty ring, whereby the cable attaches securely to the inner core at the second side;
• and
• an actuation mechanism at a proximal handle of the delivery system configured to pull the cable proximally relative to the sheath, and the inner core having cross-sectional dimensions and the yield strength being such that a dimension between the first and second sides is permanently reduced by a predetermined tension on the cable.