Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume with mild pulmonary edema . The cardiac and mediastinal contours are difficult to assess given marked rotation on the current examination . No pleural effusions are present . A left - sided pacemaker terminates with its leads in the right atrium and right ventricle , respectively . The patient is status post median sternotomy for CABG with discontinuity of one of the mid sternal wires .
    OUTPUT:
    
No obvious lead defect in the pacemaker noted . Mild pulmonary edema .