Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy , CABG , and coronary artery stenting . Heart size remains mildly enlarged . The mediastinal and hilar contours are unchanged . Pulmonary vasculature is normal . Lungs are mildly hyperinflated but clear . No pleural effusion or pneumothorax is demonstrated . There are moderate degenerative changes seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .