Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Left chest wall pacer is seen with leads extending into the region of the right atrium and right ventricle . The lungs are clear . No focal consolidation , large effusion or pneumothorax . The heart is top - normal in size . The mediastinal contours unremarkable . Bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly , otherwise unremarkable .