Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest dated ___ at 13 :02 are submitted .
    OUTPUT:
    
Left sided pacer remains in place . A large hiatal hernia again projects to the right of midline . The heart is stably enlarged . Mediastinal contours are stable given differences in patient rotation . No pulmonary edema . No large pleural effusions . No pneumothorax .