Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval placement of pacemaker with pacer leads in expected positions in left atrium and right ventricle . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Cardiac silhouette is not enlarged and has increased compared to ___ .
    OUTPUT:
    
Pacer leads in expected positions . No pneumothorax . Cardiac size is more enlarged than compared to ___ .