Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual chamber pacemaker is noted with leads terminating in the right atrium and right ventricle , unchanged . Heart size is normal . The mediastinal and hilar contours are within normal limits . The lungs are clear . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .