Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device with leads terminating in the right atrium and right ventricle is in unchanged position . Heart remains mildly enlarged . Mediastinal and hilar contours are normal . Lungs are clear . Pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute cardiopulmonary abnormality .