Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Left chest wall pacer device is noted with leads extending to the region the right atrium and right ventricle . Overlying EKG leads are present . The heart is top - normal in size and the aorta appears unfolded and mildly calcified . The lungs appear clear without definite signs of pneumonia or overt CHF . No large effusion or pneumothorax is seen . Bony structures are intact .
    OUTPUT:
    
Dual lead pacer noted . Borderline cardiomegaly .