Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A bedside AP radiograph of the chest demonstrates that the double - lumen catheter terminates well within the right atrium , approximately 7 cm below the expected location of the cavoatrial junction . It is unchanged in position from the prior study . The right subclavian line terminates in the mid SVC , also unchanged . The patient has been extubated . The lungs are clear . There continues to be enlargement of the right atrium . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . Sternotomy cerclage wires are intact .
    OUTPUT:
    
The double - lumen Port - A - Cath should be retracted approximately 7 cm to ensure proper positioning in the lower one - third of the SVC .