Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Postsurgical cardiomediastinal silhouette is unchanged . Heart size remains mildly enlarged . Hilar contours are unremarkable . There is no interstitial edema . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax . Median sternotomy wires are intact . AVR is re - demonstrated .
    OUTPUT:
    
No acute cardiopulmonary abnormality .