Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild to moderate cardiomegaly with evidence of a prior CABG and intact sternotomy wires . A left sided ICD device is seen with the leads in appropriate position . There is mild pulmonary vascular congestion with asymmetric increased opacity at the right lower lung base . A superimposed pneumonia is difficult to exclude . The hilar and mediastinal contours are otherwise unremarkable . There are trace bilateral pleural effusions . There is no pneumothorax .
    OUTPUT:
    
Pulmonary edema with possible superimposed pneumonia in the right lung base .