Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device is noted with leads in unchanged positions , in the right atrium and right ventricle . Heart size is mildly enlarged , unchanged . Mediastinal and hilar contours are within normal limits , and the pulmonary vasculature is normal . Lungs are clear without focal consolidation . Slight elevation of the left hemidiaphragm is unchanged . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality .