Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires and mediastinal clips are unchanged and compatible with prior CABG . The heart size is large but stable . The mediastinal contours are within expected post - CABG limits . Calcified atherosclerotic disease is present at the aortic knob . The lungs are clear of consolidation but the pulmonary vessels are somewhat indistinct , compatible with mild edema . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Stable cardiomegaly and mild pulmonary edema .