Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Moderate enlargement of the cardiac silhouette is demonstrated , slightly increased in the interval , with mild pulmonary edema . Elevation of the right hemidiaphragm is chronic . No large pleural effusion or pneumothorax is seen . Atelectasis is noted at the lung bases . No focal consolidation is demonstrated . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild congestive heart failure .