Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Cardiac silhouette size is within normal limits . The aorta remains tortuous . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is visualized . There are mild degenerative changes noted in the thoracic spine . Surgical anchors project over the right proximal humerus .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Normal heart size .