Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Heart size is normal . Coronary artery stenting is noted . The aorta is tortuous . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is not engorged . Lungs are hyperinflated . Subsegmental atelectasis in the lung bases is present without focal consolidation . No pleural effusion or pneumothorax is seen . Moderate degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .