Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pacemaker is seen overlying the left chest with a single intact lead terminating in the right ventricle . The lungs are well expanded and clear . The pulmonary vasculature is normal . There is stable enlargement of the cardiomediastinal silhouette . Heart size is normal . The mediastinal and hilar contours are normal . No pleural effusion or pneumothorax is seen . Multiple posterior right rib fractures are visualized , unchanged since at least ___ .
    OUTPUT:
    
No acute cardiopulmonary abnormality .