Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pulmonary valve replacement is noted . Sternotomy wires are in normal alignment , though there is discontinuity of the inferior most sternotomy wire . The lungs are clear without focal consolidation . There is no effusion or pneumothorax . Hilar contours are normal , though the heart size is mildly enlarged . There is no pulmonary vascular congestion or pulmonary edema to suggest failure .
    OUTPUT:
    
Mild cardiomegaly with no evidence of failure .