A method for delivering a platform for reinforcing an annulus of a mitral valve: Passing a catheter having a sheath covering a tube formed from a metal into the left atrium, the tube including: an annular portion defining at least one opening, a plurality of upper elements attached to an upper perimeter of the annular portion and extending axially, and a plurality of lower elements attached to a lower perimeter of the annular portion. Inserting the tube into the annulus of the mitral valve; withdrawing the sheath, but leaving the sheath covering the annular portion and the upper elements; bending the lower elements until the lower elements extend radially so as to be positioned beneath the mitral valve; then withdrawing the sheath from covering the annular portion and the upper elements; bending the upper elements until the upper elements extend radially so as to be positioned above the mitral valve.