Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates a left subclavian approach Swan - Ganz catheter in unchanged position with distal tip projecting over the right hilus at the middle lobe takeoff . A right internal jugular central venous catheter is unchanged in position , terminating in the mid SVC . Endotracheal tube terminates 4 .8 cm above the level of the carina . An NG tube is seen in unchanged position within the stomach . Previously seen median sternotomy wire fracture fragments are unchanged in position . The heart size is enlarged and is unchanged . There may be a small left pleural effusion .
    OUTPUT:
    
Support devices remain in unchanged position since the prior study . Possible small left pleural effusion . Otherwise , unchanged since the prior study .