Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacer device is noted with leads in unchanged positions in the right atrium and right ventricle . Heart size is normal . Mediastinal and hilar contours are normal . Lungs are clear . No pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .