Prosthetic heart valve docking assembly

An implantable assembly for a native heart valve comprising:

• a prosthetic heart valve comprising a frame and prosthetic leaflets;
• a unitary braided support structure:
• configured to completely surround the prosthetic heart valve;
• having an inner braided layer and an outer braided layer, the outer braided layer being disposed over the inner braided layer, and being less porous to blood than the inner braided layer;
• and
• defining a central hub and a plurality of arms angularly spaced around the prosthetic heart valve such that each arm extends radially outwardly from the prosthetic heart valve, wherein the plurality of arms comprise:
• a pair of leaflet-facing arms extending radially away from the hub and oppositely from each other in respective leaflet-facing directions each having a first length;
• and
• a pair of commissural arms extending radially away from the hub and oppositely from each other, the pair of commissural arms being oriented orthogonally with respect to the pair of leaflet-facing arms, and each having a second length longer than the first length.