Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No confluent consolidation is identified . There is no pneumothorax . Enlargement of the hilar and upper lobe vasculature is longstanding and unchanged from prior examination . There is no overt interstitial pulmonary edema . Mediastinal contours appear within normal limits . Enlargement of the cardiac silhouette is similar to prior examination , though is moderate - to - severe .
    OUTPUT:
    
1 . Chronic engorgement of the hilar vasculature , though no acute pulmonary edema 2 . No confluent consolidation to suggest pneumonia 3 . Unchanged moderate - to - severe cardiomegaly