Prosthetic heart valve devices, heart valve replacement systems and associated methods for percutaneous heart valve replacement are disclosed herein. A transcatheter heart valve prosthesis (100) configured in accordance herewith includes an expandable frame (110) having a plurality of commissure posts (130) extending therefrom, a radially expandable inflow member (140) attached to the plurality of commissure posts, and a locking mechanism (170) operably coupled to a wire (160). The wire is at least partially slideably disposed within a channel (146) formed in a wall of the inflow member and the locking mechanism is configured to permit the wire to be advanced within the channel to thereby transition the inflow member into a deployed configuration that at least partially engages tissue at the native heart valve.
