Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright PA and lateral views of the chest demonstrate the lungs are well expanded , with no evidence of large pleural effusion , pneumothorax , overt pulmonary edema , or focal airspace opacity . The heart is chronically mildly enlarged , stable compared to prior studies . A dual - lead pacemaker device is unchanged in position , with leads terminating in the right atrium and right ventricle . The heart is mildly enlarged . Aortic arch calcifications are again noted . Multilevel degenerative changes are present in the thoracic spine .
    OUTPUT:
    
Chronic mild cardiomegaly is stable . Otherwise , no acute cardiopulmonary process .