Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lateral and AP upright radiograph of the chest demonstrate an enlarged heart . A right pectorally placed pacer device is identified with leads terminating in the right atrium and ventricle . When compared to radiograph dated ___ , there is increased vascular markings and cephalization of vessels concerning for mild vascular congestion . No overt pulmonary edema is seen . No large pleural effusion is identified . No focal consolidation is seen concerning for pneumonia . Osseous structures demonstrates no acute abnormality .
    OUTPUT:
    
Stable cardiomegaly with mild vascular congestion . No overt pulmonary edema is seen .