Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph , a dual lead permanent pacemaker is been placed with leads overlying the expected locations of the right atrium and right ventricle , with no evidence of pneumothorax . Stable cardiomegaly and tortuosity of the thoracic aorta . Lungs are clear .
    OUTPUT:
    
Pacing leads in standard position with no visible pneumothorax .