Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mildly , stably enlarged . Again noted is a left - sided dual lead pacemaker with intact leads terminating in the right atrium and right ventricle , unchanged in position since prior examination . The lungs are clear . No pleural effusion or pneumothorax is identified .
    OUTPUT:
    
Stable position of the right atrial and ventricular leads of a dual lead pacemaker .