Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 08 :32 is submitted .
    OUTPUT:
    
Tracheostomy tube and left subclavian PICC line remain in place . Patient is status post median sternotomy with stable postoperative cardiac and mediastinal contours . Layering left effusion with retrocardiac consolidation favoring compressive lower lobe atelectasis . There is also patchy opacity at the right medial lung base favoring atelectasis . Early pneumonia can not be entirely excluded . No evidence of pulmonary edema . No pneumothorax .