Screw-in pericardial leads and systems for delivering screw-in pericardial leads

An implantable medical assembly for fixation of one or more medical leads to a pericardium of a patient heart and for use in providing electrotherapy to the patient heart, the implantable medical assembly comprising:

• an implantable pulse generator configured to be implanted and to generate the electrotherapy;
• a first lead body coupled to the pulse generator, the first lead body including a distal segment including a defibrillation coil and a proximal segment opposite the distal segment;
• a second lead body coupled to the pulse generator;
• and
• a sleeve defining a first lumen through which the first lead body extends and a second lumen through which the second lead body extends, the sleeve adapted to be fixed in proximity to the patient heart and comprising a first sleeve segment and a second sleeve segment distal the first sleeve segment, the second sleeve segment extending at an angle relative to a longitudinal axis of the first sleeve segment, wherein the first and second lumens extend substantially parallel to each other along both the first sleeve segment and the second sleeve segment, wherein the first lumen is discrete and spaced apart from the second lumen by an intervening wall of the sleeve that continuously extends from a first exterior side of the sleeve to a second exterior side of the sleeve opposite the first exterior side,
• wherein the sleeve is shaped to bias the defibrillation coil against the pericardium when fixed in proximity to the patient heart.