Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker generator and 2 leads are seen in appropriate position . Heart size is normal . The mediastinal and hilar contours are stable . The pulmonary vasculature is normal . Lungs are clear . There is no pneumothorax . There are no pleural effusions . There are no acute osseous abnormalities .
    OUTPUT:
    
Dual lead left - sided pacemaker is in appropriate position .