Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , the left chest wall pacer device leads projecting to the right atrium , left ventricle , and right ventricle are intact and unchanged in position . Marked cardiomegaly and bilateral hilar enlargement are unchanged since ___ . There is no focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
1 . No evidence of pulmonary edema . 2 . Marked cardiomegaly due to enlargement of the left atrium .