Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate a left chest wall pacer generator with three total leads , one terminating in the right atrium and two in the right ventricle . Of note , only one lead is plugged into the generator . No pneumothorax is seen . The lungs are clear , and the cardiac and mediastinal contours are unchanged since the prior radiograph . No pneumothorax is seen .
    OUTPUT:
    
Stable appearance of new pacer generator in the left chest wall with appropriately positioned atrial and ventricular leads , only one of which is plugged into the generator . No pneumothorax .