An implant for placement within a hollow body organ including a member having an undeployed shape for delivery to the hollow body and a deployed shape for implantation therein. The member has a plurality of links pivotably connected to each other, and a flexible elongated tether connected to the member such that tensioning the tether places the member in the deployed shape. The member has sufficient rigidity in its deployed shape to exert an outward force against an interior of the hollow body so as to bring together two substantially opposing surfaces of the hollow body.