Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The initial radiograph demonstrates the tip of the pacer wire projecting over the medial right atrium . The pacer wire is repositioned on subsequent films , and on the final film , the tip projects over the superior aspect of the right atrium . This finding was discussed with Dr . ___ , ___ was already aware . Moderate pulmonary edema is unchanged . The enlarged heart size is unchanged .
    OUTPUT:
    
Tip of pacer wire projects over the superior aspect of right atrium . Unchanged moderate pulmonary edema . Unchanged cardiomegaly .