Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 07 : 54 is submitted .
    OUTPUT:
    
The left pleural pigtail catheter remains in place . There is worsening bilateral mild to moderate pulmonary and interstitial edema . Stable postoperative cardiac and mediastinal contours status post median sternotomy . No pneumothorax . No large effusions .