Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates heart size upper limits of normal in size . There are median sternotomy wires which appear intact . Multiple surgical clips project over the left mediastinal contour . There is central vascular engorgement . There is no large pleural effusion . Linear opacity at the left lung base is likely atelectatic in etiology . There is no pneumothorax . There is no opacity convincing for infectious process .
    OUTPUT:
    
Mild central vascular engorgement . No opacity convincing for pneumonia .