Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable view of the chest was obtained . Patient is status post median sternotomy and CABG . There are bilateral pleural effusions with overlying atelectasis . Left base retrocardiac opacity likely relates to combination of pleural effusion and atelectasis , although underlying consolidation can not be excluded . Previously seen opacity along the right heart border has decreased in the interval . Cardiac silhouette remains mildly enlarged .
    OUTPUT:
    
Bilateral pleural effusions with overlying atelectasis . Underlying left base consolidation can not be excluded .