Embodiments of the invention are directed to an implantable device that includes a tissue anchor for securing a portion of the device to tissue of the patient. Embodiments of the implantable device include an electrode lead and a pelvic treatment apparatus.One embodiment of the electrode lead (104) comprises a lead body (110), an electrode (111) attached to a distal end (114) of the lead body and a tissue anchor (120). The electrode comprises a plurality of stimulation elements (112) formed of an electrically conductive material, and at least one insulative element (116) formed of an electrically non-conductive material. The stimulation elements and the at least one insulative element are joined together to form a stacked column (140) of alternating stimulation and insulative elements. The electrode lead also comprises a plurality of electrically conductive wires (118) each extending through the lead body and coupled to one of the stimulation elements. The tissue anchor is configured to facilitate anchoring the electrode to tissue (240) of the patient.One embodiment of the tissue anchor comprises a plurality of suture wings (172). Each suture wing comprises first and second ends (174, 176) that are attached to the stimulation element or the insulative element. Each suture wing also comprises an intermediary portion (178) that extends between the first and second ends. The suture wings each form a suture hole (180), through which a suture (198) can be fed for anchoring the electrode to tissue of the patient.Another embodiment of the tissue anchor comprises a body (190) and a suture lock (192). The suture lock comprises a passageway (220) formed in the body and configured to receive a portion (223) of the suture (198). The suture lock also includes a pinching component (222) that is configured to pinch the portion of the suture within the passageway and prevent movement of the portion of the suture relative to the pinching component.Another embodiment of the implantab
