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 seen with catheter extending into the expected location of the right ventricle , unchanged . There is mild central pulmonary vascular engorgement which could indicate mild increased pulmonary pressures . The heart is stably enlarged . Atherosclerotic calcification of the aortic knob noted . Lung volumes are low , though there is no definite sign of pneumonia . Bony structures appear intact .
    OUTPUT:
    
Stable cardiomegaly with mild pulmonary interstitial edema .