Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Interstitial markings appear somewhat increased , particularly at the lung bases . There is also hazy increased density at the lung bases consistent with pleural fluid . The heart is considerably enlarged as before . The patient is status post median sternotomy . Mediastinal structures are stable . An ICD and PICC remain in place .
    OUTPUT:
    
Increased prominence of the interstitial markings which may be due to developing and edema . Persistent bilateral pleural effusions which may have increased somewhat as well . No other change .