Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy and aortic valve replacement . There has probably also been coronary artery bypass graft surgery judging from the pattern of clips along the left upper cardiac border . A central venous catheter terminates in the upper atrium . The cardiac , mediastinal and hilar contours appear stable . There is persistent layering pleural effusion projecting over the right lower lung , which is similar to increased , probably moderate in size . Coinciding right basilar atelectasis is likely and probably unchanged . A very small pleural effusion is likely on the left . Engorged indistinct pulmonary vessels suggests mild vascular congestion .
    OUTPUT:
    
Persistent moderate right - sided pleural effusion with a mild suspected increase . Findings also suggesting mild vascular congestion .