An implantable anchor for anchoring a lead or catheter relative to biological tissue, implantable system including such an anchor and a lead or catheter, and a method of use of such anchor. The anchor comprises a body having a channel adapted to receive a catheter or lead, and a cover mounted on the body for pivoting motion along a lateral axis, that is an axis that extends generally in the lateral direction perpendicular to the catheter or lead, between an open position in which the anchor is adapted to allow a lead or catheter to be placed in or moved along the channel, and a locked position in which the anchor is adapted to retain a lead or catheter within the channel.
