Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a right pectoral pacemaker / AICD with three leads in standard position . The patient is status post median sternotomy with multiple intact sternal wires . Mediastinal surgical clips are compatible with prior CABG surgery . The cardiac silhouette is moderately enlarged . The mediastinal contours are prominent partially due to tortuosity of the thoracic aorta . Further evaluation of the aortic arch is pending with CTA of the chest . There is mild pulmonary vascular congestion . No significant pleural effusion or pneumothorax is detected . There is no focal consolidation concerning for pneumonia .
    OUTPUT:
    
Mild pulmonary vascular congestion and cardiomegaly without overt signs of acute heart failure .