An implantable valve system comprising: an adjustable stabilizing ring (100, 200, 300, 600, 1002, 1102, 1250, 1350, 1450, 2320, 2430) comprising: a body member (101,201) that is transitionable from an elongate insertion geometry to an annular operable geometry, and a plurality of anchors (104, 700, 710, 2020, 2330, 2440) deployable in the annular operable geometry to engage the annulus of a cardiovascular valve; and an implantable valve frame (2310a, 23 10b, 2410) in mechanical communication with the adjustable stabilizing ring (2320, 2430), wherein the mechanical communication comprises partial physical contact between the implantable valve frame (2310a, 2310b, 2410) and the adjustable stabilizing ring (2320, 2430), wherein the elongate insertion geometry is configured to allow percutaneous passage of the stabilizing ring (2320, 2430), via a catheter, to a position adjacent to an annulus of the cardiovascular valve, wherein the annular operable geometry has a closed state to conform to the annulus of the cardiovascular valve, wherein the implantable valve frame (2310a, 2310b, 2410) comprises a first support element, a second support element and one bridging element extending from the first support element to the second support element, and wherein the bridging element comprises a single continuous surface to thereby form a straight profile of the implantable valve frame or wherein the bridging element extends radially inwards towards a central axis of the implantable valve frame to thereby form a constricted profile of the implantable valve frame. an adjustable stabilizing ring (100, 200, 300, 600, 1002, 1102, 1250, 1350, 1450, 2320, 2430) comprising: a body member (101,201) that is transitionable from an elongate insertion geometry to an annular operable geometry, and a plurality of anchors (104, 700, 710, 2020, 2330, 2440) deployable in the annular operable geometry to engage the annulus of a cardiovascular valve; and a body member (101,201) that is transitionable from an elongate insertion geometry to an annular operable geometry, and a plurality of anchors (104, 700, 710, 2020, 2330, 2440) deployable in the annular operable geometry to engage the annulus of a cardiovascular valve; and an implantable valve frame (2310a, 23 10b, 2410) in mechanical communication with the adjustable stabilizing ring (2320, 2430), wherein the mechanical communication comprises partial physical contact between the implantable valve frame (2310a, 2310b, 2410) and the adjustable stabilizing ring (2320, 2430), wherein the elongate insertion geometry is configured to allow percutaneous passage of the stabilizing ring (2320, 2430), via a catheter, to a position adjacent to an annulus of the cardiovascular valve, wherein the annular operable geometry has a closed state to conform to the annulus of the cardiovascular valve, wherein the implantable valve frame (2310a, 2310b, 2410) comprises a first support element, a second support element and one bridging element extending from the first support element to the second support element, and wherein the bridging element comprises a single continuous surface to thereby form a straight profile of the implantable valve frame or wherein the bridging element extends radially inwards towards a central axis of the implantable valve frame to thereby form a constricted profile of the implantable valve frame.