A device, including an implant for placement within a hollow body organ. The implant includes a member having an undeployed shape for delivery within a hollow body and one or more deployed shapes for implantation therein. 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. The implant includes a means for changing the deployed shape of the member while implanted within the hollow body. The device includes a wearable element configured to be worn by a patient, and has an external device coupled thereto and configured to send and/or receive a wireless signal to control the means for changing the deployed shape.