Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device is noted with leads in unchanged positions , terminating in the right atrium and right ventricle . Heart size remains mildly enlarged but unchanged . Mediastinal and hilar contours are within normal limits . Lungs are clear . Pulmonary vasculature is normal . No pleural effusion or pneumothorax is present . No acute osseous abnormalities present . There is no subdiaphragmatic free air .
    OUTPUT:
    
No acute cardiopulmonary abnormality .