Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . There has been interval placement of a dual - lead left - sided pacer device with leads extending to the expected positions of the right atrium and right ventricle . The cardiac silhouette is moderate to severely enlarged . There is mild - to - moderate pulmonary edema and bibasilar opacities . Left base retrocardiac opacity may be due to combination of pleural effusion and atelectasis . Patient is status post median sternotomy and CABG . No pneumothorax is seen .
    OUTPUT:
    
Enlarged cardiac silhouette with mild - to - moderate pulmonary vascular congestion and bibasilar opacities . Bibasilar opacities could be due to a combination of pleural effusion and atelectasis , particularly on the left , however , underlying consolidation due to infection or aspiration not excluded .