Heart valve docking system

A method of implanting a docking device for a prosthetic valve at a native heart valve, comprising the steps of:

• obtaining a docking device comprising a flexible tubular body having a distal end, a proximal end, and a first lumen and a second lumen extending at least partially therethrough, wherein when a first coil having a first diameter is located within the first lumen, the tubular body adopts a first configuration;
• positioning a distal end of a delivery catheter into a first chamber of a heart;
• advancing the tubular body, from within the delivery catheter so that the distal end of the tubular body is advanced between native valve leaflets, and positioned in a second chamber of the heart;
• inserting a second coil comprising a plurality of turns having a second diameter into the second lumen of the docking device, so that the tubular body adopts a second configuration;
• releasing the proximal end of the docking device in the first chamber of the heart;
• inserting a replacement valve in an inner space defined by the tubular body in the second configuration;
• and
• radially expanding the replacement valve until there is a retention force between the replacement valve and the docking device sufficient to hold the replacement valve in a stable position in the native heart valve.