Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . There is a small amount of pericardial effusion and pneumopericardium , otherwise a normal postoperative cardiomediastinal silhouette is seen . There small bilateral pleural effusions and left lower lobe atelectasis . No pneumothorax is seen .
    OUTPUT:
    
Small bilateral pleural effusions and left lower lobe atelectasis .