Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The upper 2 sternotomy wires are fractured , unchanged . A left IJ central venous catheter projects over the upper SVC . There is no pneumothorax . Retained pacer leads are again noted . Lung volumes are low , but the lungs are grossly clear . Mild cardiomegaly despite the projection is stable .
    OUTPUT:
    
No significant interval change .