Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . A left chest wall pacer device is again seen with single lead extending into the region of the right ventricle . Aortic CoreValve noted . Cardiomegaly is moderate . Mediastinal contour is stable with aortic calcification . There is mild to moderate pulmonary edema . No large effusion or pneumothorax . Bony structures are intact .
    OUTPUT:
    
Mild to moderate pulmonary edema . Difficult to exclude a subtle superimposed pneumonia .