Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Heart size is top normal . Aorta is tortuous , unchanged . Mediastinal and hilar contours are otherwise similar from the previous study . Pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is present . Minimal patchy atelectasis is noted lung bases . There are mild degenerative changes seen within the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .