An implantable medical device (100, 300, 400), comprising: a frame comprising at least one elongate member (120, 250, 320, 650, 720, 820); and a fixation member (200, 340, 350, 600, 700, 800, 900, 1000, 1300, 1400) engaged with the at least one elongate member, the fixation member comprising: a first cuff (210, 610, 1430) surrounding a perimeter of the at least one elongate member from between 180° to 360°, a second cuff (220, 620, 1440) surrounding a perimeter of the at least one elongate member from between 180° to 360°, a tissue engagement member (230, 360, 440, 640, 710, 810, 910, 920, 1010, 1020, 1310, 1320, 1410, 1420) extending from one of the first cuff and the second cuff and configured to anchor to tissue at an implant site to thereby hold the implantable medical device in a position at the implant site, and a cuff joining member (240, 630) connected at a first end to the first cuff and at a second end to the second cuff, wherein the cuff joining member surrounds the periphery of the at least one elongate member of the frame by less than 180° and is biased to align with the inside curvature of a bend portion (260, 330, 730, 830) of the at least one elongate member when the first cuff and second cuff are located on opposite sides of the bend portion, and the first cuff (210, 610, 1430) and the second cuff (220, 620, 1440) have a slip-fit relation to the at least one elongate member. a frame comprising at least one elongate member (120, 250, 320, 650, 720, 820); and a fixation member (200, 340, 350, 600, 700, 800, 900, 1000, 1300, 1400) engaged with the at least one elongate member, the fixation member comprising: a first cuff (210, 610, 1430) surrounding a perimeter of the at least one elongate member from between 180° to 360°, a second cuff (220, 620, 1440) surrounding a perimeter of the at least one elongate member from between 180° to 360°, a tissue engagement member (230, 360, 440, 640, 710, 810, 910, 920, 1010, 1020, 1310, 1320, 1410, 1420) extending from one of the first cuff and the second cuff and configured to anchor to tissue at an implant site to thereby hold the implantable medical device in a position at the implant site, and a first cuff (210, 610, 1430) surrounding a perimeter of the at least one elongate member from between 180° to 360°, a second cuff (220, 620, 1440) surrounding a perimeter of the at least one elongate member from between 180° to 360°, a tissue engagement member (230, 360, 440, 640, 710, 810, 910, 920, 1010, 1020, 1310, 1320, 1410, 1420) extending from one of the first cuff and the second cuff and configured to anchor to tissue at an implant site to thereby hold the implantable medical device in a position at the implant site, and a cuff joining member (240, 630) connected at a first end to the first cuff and at a second end to the second cuff, wherein the cuff joining member surrounds the periphery of the at least one elongate member of the frame by less than 180° and is biased to align with the inside curvature of a bend portion (260, 330, 730, 830) of the at least one elongate member when the first cuff and second cuff are located on opposite sides of the bend portion, and the first cuff (210, 610, 1430) and the second cuff (220, 620, 1440) have a slip-fit relation to the at least one elongate member.