A system for repairing a tricuspid valve in a patient's heart, the system being configured to be positioned at a distal end of a catheter having a proximal end and a distal end, said system comprising: a first shaft; a second shaft coaxially aligned with, and slideable in relation to, the first shaft; a first disc removably mounted on the first shaft, the first disc having a compressed condition which has a cylindrical profile for delivery, the first disc being formed to adopt, for deployment, an expanded condition that has a concave surface configured to face towards a proximal direction, wherein the first disc includes a plurality of openings positioned on an outer perimeter of the first disc, and a first cinch wire extending through the plurality of openings and thence configured to extend through the catheter to the proximal end; and a second disc removably mounted on the second shaft, the second disc having a compressed condition which has a cylindrical profile for delivery, the second disc positioned proximal of the first disc, characterized in that the second disc being formed from shape memory metal, to adopt, for deployment, an expanded condition that has a convex surface configured to face towards a distal direction, wherein the second disc is smaller than the first disc, and wherein the convex surface of the second disc faces the concave surface of the first disc in the expanded condition of the first and second discs (200, 250); and the first cinch wire being tensionable from the proximal end of the catheter for reducing the outer perimeter of the first disc when the second disc is within the first disc to close the first disc into a ball shape over the second disc with a portion of each of the three leaflets of the tricuspid valve (52, 54, 56) trapped between the first disc and the second disc. a first shaft; a second shaft coaxially aligned with, and slideable in relation to, the first shaft; a first disc removably mounted on the first shaft, the first disc having a compressed condition which has a cylindrical profile for delivery, the first disc being formed to adopt, for deployment, an expanded condition that has a concave surface configured to face towards a proximal direction, wherein the first disc includes a plurality of openings positioned on an outer perimeter of the first disc, and a first cinch wire extending through the plurality of openings and thence configured to extend through the catheter to the proximal end; and a second disc removably mounted on the second shaft, the second disc having a compressed condition which has a cylindrical profile for delivery, the second disc positioned proximal of the first disc, characterized in that the second disc being formed from shape memory metal, to adopt, for deployment, an expanded condition that has a convex surface configured to face towards a distal direction, wherein the second disc is smaller than the first disc, and wherein the convex surface of the second disc faces the concave surface of the first disc in the expanded condition of the first and second discs (200, 250); and the first cinch wire being tensionable from the proximal end of the catheter for reducing the outer perimeter of the first disc when the second disc is within the first disc to close the first disc into a ball shape over the second disc with a portion of each of the three leaflets of the tricuspid valve (52, 54, 56) trapped between the first disc and the second disc.