Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate a left chest wall pacer device with lead extending into the region of the right atrium and right ventricle , unchanged . The lungs are clear without focal consolidation , effusion or pneumothorax . The heart and mediastinal contours are normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Stable appearance of pacemaker and unchanged position of leads .