Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Left chest wall AICD is unchanged with leads extending to the region the right atrium , right ventricle , and coronary sinus . The heart remains mildly enlarged . There is no focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild cardiomegaly . Otherwise unremarkable .