Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate a right - sided chest wall pacemaker with two leads terminating in the right atrium and right ventricle . These are unchanged in position , accounting for differences in technique , to the prior radiograph . No other relevant change is noted within the lung parenchyma . No pneumothorax is seen .
    OUTPUT:
    
Satisfactory positioning of dual - chamber pacemaker with leads in the right atrium and right ventricle with no pneumothorax .