Retrievable prosthesis delivery system

A method for delivering a mitral valve prosthesis, said method comprising:

• partially deploying the mitral valve prosthesis while being carried on a delivery catheter by sliding a sheath away from the mitral valve prosthesis to progressively expose an anchor portion of the mitral valve prosthesis;
• deploying from the sheath elbows of ventricular anchors extending from the anchor portion of the mitral valve prosthesis by allowing the elbows to radially expand beyond the anchor portion and the sheath independent of axial movement of the anchor portion;
• and
• applying tension to a plurality of filaments attached to the elbows to collapse the elbows radially inward toward the anchor portion independent of axial movement of the anchor portion and then sliding the sheath toward the mitral valve prosthesis to retrieve the mitral valve prosthesis back into the sheath, wherein the plurality of filaments are attached to the elbows via a single tether extending through loops of each filament and the elbows.