Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 06 :42 is submitted .
    OUTPUT:
    
Right subclavian PICC line has its tip in the mid SVC . Status post median sternotomy with stably enlarged postoperative cardiac and mediastinal contours . Lung volumes are lower with crowding of the vasculature and there is worsening superimposed pulmonary edema . Bibasilar opacities with associated effusions are again seen consistent with partial lower lobe compressive atelectasis . Pneumonia can not be entirely excluded . No pneumothorax .