Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Postsurgical cardiomediastinal silhouette is unremarkable . Sternal wires appear intact . Hilar contours are unremarkable . Lungs are clear . Replacement aortic valve is best seen on lateral view . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .