Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study from ___ , the heart size is essentially unchanged allowing for differences in technique . Mediastinal surgical clips and median sternotomy wires are stable . Left chest wall pacemaker generator and right atrial and ventricular leads appear appropriately positioned .
    OUTPUT:
    
Appropriately positioned cardiac pacing wires with no evidence of pleural or pericardial effusion .