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.
