A transcatheter heart valve prosthesis configured in accordance herewith includes an expandable frame having a plurality of commissure posts extending therefrom, a radially expandable tubular component inflow member attached to the plurality of commissure posts, and a locking mechanism operably coupled to a wire. The wire is at least partially slideably disposed within a channel formed in a wall of the tubular component inflow member and the locking mechanism is configured to permit the wire to be advanced within the channel to thereby transition the inflow member tubular component into a deployed configuration that at least partially engages tissue at the native heart valve.