Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been no interval change in the appearance of the chest compared to the prior radiograph obtained approximately ___ min earlier . Patient is status post median sternotomy and CABG . A left - sided pacer device is noted with lead terminating in the right ventricle . Mild enlargement of the cardiac silhouette is present . The aorta is tortuous . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . Moderate multilevel degenerative changes are present in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .