A lead fixation device that includes a helix having a surface, and a layer of electrically insulating material that covers one or more selected regions of the surface leaving one or more additional regions of the surface exposed. The insulating material defines one of a plurality of individual exposed portions along the length of the helix having a plurality of different configurations, e.g. shapes and sizes, or an insulating strip that wraps around the helix while advancing along the length of the helix.