Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , no significant changes are appreciated . Dual chamber cardiac pacemaker leads are intact and unchanged in position , running their expected courses into the right atrium and right ventricle . Heart size is normal . No pulmonary vascular congestion or pulmonary edema . Lungs are fully expanded and clear . No pleural abnormalities .
    OUTPUT:
    
Dual chamber cardiac pacemaker leads follow their expected course of the right atrium and right ventricle , unchanged in position compared to ___ .