Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy and aortic valve replacement . The heart is normal in size . There is mild unfolding of the thoracic aortic . There is no pleural effusion or pneumothorax . The lungs appear clear . Bony structures appear within normal limits .
    OUTPUT:
    
Status post aortic valve replacement . No evidence of acute cardiopulmonary disease .