Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Heart size is normal . An epicardial lead is noted on the lateral view . Mediastinal and hilar contours are unremarkable . Lung volumes are somewhat low with minimal atelectasis noted within the left lung base . No focal consolidation , pleural effusion or pneumothorax is present . The pulmonary vasculature is normal . Multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .