Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and mediastinal clips are again noted as well as valve replacement . There is mild persistent bibasilar atelectasis . A tiny left pleural effusion is present . The heart appears top normal in size . The mediastinal contour is prominent though stable . There is no pneumothorax . The imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild cardiomegaly with basilar atelectasis and small left pleural effusion .