An annuloplasty implant comprising first and second supports being adapted to be arranged as a coil in a coiled configuration around an axial direction, wherein the first and second supports are adapted to be arranged on opposite sides of native heart valve leaflets of a heart valve, wherein the first support comprises first retention units fixed in relation to an outer surface of the first support and arranged along at least a first retention portion thereof, the first retention units being configured to pierce and anchor into tissue at a first side of the heart valve, wherein the second support comprises second retention units fixed in relation to an outer surface of the second support and arranged along at least a second retention portion thereof, the second retention units being configured to pierce and anchor into tissue at a second side of the heart valve, opposite the first side wherein the first and second retention portions are curved in the coiled configuration, and wherein the first and second retention units extend from respective first and second retention portions to produce a retention force, in use, at both of said opposite sides, wherein the first and second supports are separated with a first pitch distance (p 1) in the axial direction, in the coiled configuration, and wherein the first and/or second support comprises a shape-memory material configured to assume a contracted state having a second pitch distance (p 2) in the axial direction being shorter than the first pitch distance, wherein the shape-memory material is configured to assume said contracted state in response to an activation temperature, wherein the first and second supports are configured to engage with a restraining unit at a separation at the first pitch distance and to assume the contracted state upon removal of the restraining unit, wherein the restraining unit is a delivery catheter. first and second supports being adapted to be arranged as a coil in a coiled configuration around an axial direction, wherein the first and second supports are adapted to be arranged on opposite sides of native heart valve leaflets of a heart valve, wherein the first support comprises first retention units fixed in relation to an outer surface of the first support and arranged along at least a first retention portion thereof, the first retention units being configured to pierce and anchor into tissue at a first side of the heart valve, wherein the second support comprises second retention units fixed in relation to an outer surface of the second support and arranged along at least a second retention portion thereof, the second retention units being configured to pierce and anchor into tissue at a second side of the heart valve, opposite the first side wherein the first and second retention portions are curved in the coiled configuration, and wherein the first and second retention units extend from respective first and second retention portions to produce a retention force, in use, at both of said opposite sides, wherein the first and second supports are separated with a first pitch distance (p 1) in the axial direction, in the coiled configuration, and wherein the first and/or second support comprises a shape-memory material configured to assume a contracted state having a second pitch distance (p 2) in the axial direction being shorter than the first pitch distance, wherein the shape-memory material is configured to assume said contracted state in response to an activation temperature, wherein the first and second supports are configured to engage with a restraining unit at a separation at the first pitch distance and to assume the contracted state upon removal of the restraining unit, wherein the restraining unit is a delivery catheter.