Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with the next preceding supine chest examination obtained five hours earlier . The patient is now status post sternotomy with typical circular metallic wires in midline . The patient remains extubated similar as on the preceding study . The right internal jugular sheath in unchanged position , but again noted kinking in the outside portion of the sheath . Right - sided mediastinal drainage tube advanced from below remains in place , terminating in paramediastinal position at the level just 1 cm below the clavicle . The position is unchanged in comparison with the previous study , and there is no evidence of pneumothorax or any new pleural effusions that can be identified in this portable single view chest examination . An additional right - sided chest tube advanced from the lower lateral chest wall is seen to terminate overlying the right - sided cardiomediastinal junction . The right lateral pleural sinus is free from any fluid accumulation . Heart shadow moderately enlarged as before , but no significant interval change . There exists a small drainage tube seen to terminate in the central portion of the heart shadow and possibly representing a pericardial drainage . This line existed already on the previous examination five hours ago .
    OUTPUT:
    
Stable chest findings , no development of pneumothorax . Significant increase of heart shadow .