An implantable pacing and/or defibrillation lead, said lead (10, 100, 200) extending from a proximal end to a distal end, wherein the proximal end of the lead (10, 100, 200) is configured to be connected to an implantable medical device, the lead (10, 100, 200) comprising: - an active fixation electrode (22, 126, 226) at the distal end of the lead (10, 100, 200), which is mechanically and electrically coupled to a conductive driver shaft (24, 120, 220) moveably arranged in a distal housing portion (122, 222) of the lead (10, 100, 200), wherein the active fixation electrode (22, 126, 226) is movable from a retracted position in which the active fixation electrode (22, 126, 226) is completely housed inside the distal housing portion (122, 222), to an extended position, in which the active fixation electrode (126, 226) extends in a distal direction at least partially beyond the distal housing portion (122, 222), and - an electrically conductive compression spring (176, 276), said lead (10, 100, 200) further comprising: - a guiding member (35, 136, 236) arranged inside the distal housing portion (122, 222) and comprising a tubular body (138, 238) electrically connected with the distal housing portion (122, 222), wherein the conductive driver shaft (24, 120, 220) is slideably arranged through a lumen extending through the tubular body (138, 238), wherein the tubular body (138, 238) further comprises a radial opening (158, 258) in communication with the lumen, and wherein the electrically conductive compression spring (176, 276) is partially radially arranged around the tubular body (138, 238) and its radial opening (158, 258), such that the electrically conductive compression spring (176, 276) is forced by its restoring force against the conductive driver shaft (24, 120, 220). - an active fixation electrode (22, 126, 226) at the distal end of the lead (10, 100, 200), which is mechanically and electrically coupled to a conductive driver shaft (24, 120, 220) moveably arranged in a distal housing portion (122, 222) of the lead (10, 100, 200), wherein the active fixation electrode (22, 126, 226) is movable from a retracted position in which the active fixation electrode (22, 126, 226) is completely housed inside the distal housing portion (122, 222), to an extended position, in which the active fixation electrode (126, 226) extends in a distal direction at least partially beyond the distal housing portion (122, 222), and - an electrically conductive compression spring (176, 276), - a guiding member (35, 136, 236) arranged inside the distal housing portion (122, 222) and comprising a tubular body (138, 238) electrically connected with the distal housing portion (122, 222), wherein the conductive driver shaft (24, 120, 220) is slideably arranged through a lumen extending through the tubular body (138, 238), wherein the tubular body (138, 238) further comprises a radial opening (158, 258) in communication with the lumen, and wherein the electrically conductive compression spring (176, 276) is partially radially arranged around the tubular body (138, 238) and its radial opening (158, 258), such that the electrically conductive compression spring (176, 276) is forced by its restoring force against the conductive driver shaft (24, 120, 220).