Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph provided demonstrates a left chest wall pacer device with 2 leads extending to the expected location of the right atrium and right ventricle . The heart remains mildly enlarged . There is no pleural effusion with interval resolution of previously noted right pleural effusion . No pneumothorax . No focal consolidation or pneumothorax . The mediastinal contour is stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute findings . Mild cardiomegaly is stable .