An intravascular cuff (10) for receiving a prosthetic valve in situ is disclosed. The cuff (10) comprises a two-ply braided tubular structure (14) defining a lumen and having an extended configuration and a deployed configuration. It may further include a material (32) sandwiched between the plies of the two-ply braided tubular structure. When said two-ply braided tubular structure is released from a delivery catheter, ends of said two-ply braided tubular structure fold back on themselves to conform to the shape of a target vessel and create gaps between the two plies while said lumen remains well-defined and centered within said intravascular cuff, whereby in said deployed configuration, said material prevents blood from flowing through said plies of said two-ply braided tubular structure. Alternatively, when said two-ply braided tubular structure is released from a delivery catheter, ends of said two-ply braided tubular structure expand to create gaps between the two plies while said lumen remains well-defined and centered within said intravascular cuff, whereby said gaps in said ends create funneled ends in said lumen for guiding a delivery device for a prosthetic valve into said lumen.
