A splint assembly includes an elongate body. An active fixation fastener is coupled substantially adjacent to a distal end of the elongate body. The splint assembly includes at least one flange coupled to the elongate body proximal the active fixation fastener. In one option, a stop of the at least one flange projects outside of an outer perimeter of the elongate body. In another option, the active fixation fastener is spaced from the at least one flange where the active fixation fastener and the at least one flange pull at least one heart chamber toward a substantially unexpanded shape when in an implanted condition within the heart an artery or a vein. In yet another option, the elongate body includes a predetermined curvature along at least a portion of the elongate body between the active fixation fastener and the at least one flange.