Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable view of the chest demonstrates median sternotomy wires and vascular clips , unchanged compared to the prior study , with fracture of the superior most median sternotomy wire . The lung volumes are low in comparison with the prior study , with associated bibasilar atelectasis and persistent bilateral interstitial pulmonary edema , slightly worse on the left . The heart is mild to moderately enlarged , but stable since the prior exam . There is no pneumothorax or large pleural effusion . Bilateral apical pleural thickening is again seen .
    OUTPUT:
    
Low lung volumes with persistent moderate interstitial pulmonary edema , and bibasilar atelectasis .