Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Mild to moderate enlargement of cardiac silhouette is unchanged . Mediastinal and hilar contours are unchanged . Mild pulmonary edema appears similar when compared to the prior study . There is no pleural effusion , focal consolidation or pneumothorax identified . Diffuse thoracic aortic calcifications are again noted . There are multilevel mild degenerative changes of the thoracic spine .
    OUTPUT:
    
Mild congestive heart failure .