Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Widening of the mediastinum is unchanged and mostly compatible with bleeding which is not unexpected in a redo sternotomy for AVR . Mild pulmonary edema is unchanged with left lower lobe atelectasis and minimal pneumopericardium . ET tube ends 4 .1 cm above carina . NG tube is in the stomach . Right - sided Swan - Ganz projects in main pulmonary artery . There is no pneumothorax . Pleural effusion is small if any .
    OUTPUT:
    
Stable postoperative widening of mediastinum is probably secondary to bleeding which is not unexpected in a redo sternotomy .