Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart remains enlarged . Mild interstitial pulmonary edema has slightly worsened . Opacification at the left base is unchanged and may reflect atelectasis , aspiration or pneumonia . There is no pneumothorax . As before median sternotomy wires are intact . Surgical clips project in the right axilla . Aortic valve replacement is seen . Again there is compression deformity with vertebra plana involving the mid thoracic spine .
    OUTPUT:
    
1 . Cardiac enlargement and worsening of mild interstitial edema . 2 . Persistent opacity at the left base may reflect atelectasis and pleural effusion , however an underlying pneumonia can not be excluded .