Chest radiograph (AP view) showing a CIED with right ventricular, right atrial, and coronary sinus leads

The pulse generator of this CIED has been relocated using lead extenders (which eliminate the need for new lead placement) from the left to the right side to accommodate the patient's radiation therapy for breast cancer. The shock coils (one of which is seen at the tip of the right ventricular lead arrow) identify this system as high-energy capable (implantable cardioverter-defibrillator). The coronary sinus lead is used to pace the left ventricle for cardiac resynchronization therapy.