Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are fully expanded and clear . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . Left - sided dual - chamber pacemaker is unchanged in position with leads in the right atrium and right ventricle . Right port - a Cath terminates in the low SVC , unchanged from prior . Left elevation of diaphragm is stable .
    OUTPUT:
    
Unchanged appearance of left dual - chamber pacemaker .