Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 13 : 15 is submitted .
    OUTPUT:
    
Interval placement of dual lead left - sided pacer with the leads terminating over the expected location of the right atrium and right ventricle , respectively . Dual lumen right internal jugular large bore catheter is unchanged in position . The patient is status post median sternotomy with overall stable cardiac and mediastinal contours given patient rotation . Lung volumes are slightly lower and there has been interval appearance of mild interstitial edema . No pneumothorax .