Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . The heart is moderately enlarged . Layering pleural effusions are present . These are difficult to directly compare to the prior study , because of suspected differences in positioning , but the appearance is probably fairly similar . Coinciding compressive atelectasis is likely . Mild interstitial opacification suggests mild vascular congestion , new since the prior study . Prior vertebroplasties have been performed .
    OUTPUT:
    
Findings suggesting mild interstitial pulmonary edema and persistent bilateral pleural effusions , probably at least moderate in size .