IMPLANTABLE MEDICAL DEVICES, SYSTEMS AND COMPONENTS THEREOF

An implantable medical system comprising an implantable stimulation device; and an implantable stimulation lead (300, 400, 500), the device and lead being adapted for coupling to one another, the lead (300, 400, 500) comprising, an elongate insulative body (350, 450) including a proximal segment (353), a distal segment (351), and a pre-formed bend (352) extending therebetween, a stimulation electrode circuit, at least one sense electrode circuit, the stimulation and sense electrode circuits being supported by the insulative body (350), the distal segment (351) of the insulative body (350) having electrodes of the stimulation electrode circuit and the at least one sense electrode circuit mounted thereabout, and a non-conductive filament (200) including a plurality of fixation projections (205), wherein the filament, including the fixation projections (205), extends along a length of an outer surface of the pre-formed bend (352) and distal segment (351) of the insulative body, the filament (200) being wound about all or a portion of the length with an open pitch and being secured to the outer surface (355, 455) such that the projections (205) thereof protrude outward from the outer surface (355, 455) and are spaced apart from one another along the length of the outer surface (355, 455).