Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and show mild interstitial opacities with evidence of cephalization of the pulmonary vessels . The cardiac silhouette is enlarged . The mediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present . A left - sided pacer terminates with its lead in the right atrium and the right ventricle . An aortic valve replacement is noted in appropriate position . Sternal wires are intact .
    OUTPUT:
    
Mild pulmonary vascular congestion with interstitial edema .