Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires are intact . The heart is severely enlarged , unchanged compared to prior study . Mediastinal and hilar contours are unchanged . The aorta remains tortuous . There is increased pulmonary edema bilaterally . Bibasilar opacities have increased .
    OUTPUT:
    
1 . Moderate pulmonary edema , increased prior study , worse on the left . Early pneumonia would be difficult to recognize . 2 . Increased bibasilar opacities likely secondary to increased pulmonary edema , atelectasis , and small pleural effusions .