Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 13 :51 is submitted .
    OUTPUT:
    
Endotracheal tube and left - sided pacer unchanged in position . A nasogastric tube is seen coursing below the diaphragm with the tip not identified . The right internal jugular central line has been replaced with a new line terminating in the proximal to mid SVC . The left internal jugular central line has been replaced and the tip is now in the distal subclavian vein near its junction with the superior vena cava . The patient is status post median sternotomy with mitral valve replacement and CABG with stable postoperative cardiac enlargement . Retrocardiac consolidation and right medial and infrahilar opacities are stable . Probable layering left effusion . No pulmonary edema . No pneumothorax .