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(A) Patient with an endocardial CIED. The majority of the lead’s trajectory (white arrows) passes through the subclavian vein with minimal variation in trajectory between patients. (B) Patient with two epicardial leads looped on the anterior surface of the heart, and (C) Patient with an epicardial lead looped on the inferior surface of the heart. (D) 3D view of two epicardial leads looped on the anterior surface of the heart as shown in (B).
