Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An intra aortic balloon pump terminates in the proximal descending aorta approximately 4 cm below the aortic arch . A Swan - ___ catheter terminates in the proximal right pulmonary artery . Remaining indwelling support devices are stable and in appropriate position . Mediastinal contours and severe cardiomegaly are stable . Bibasilar atelectasis and small bilateral pleural effusions are unchanged . No pneumothorax .
    OUTPUT:
    
Intra-aortic balloon pump in appropriate position . No pneumothorax .