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 similar study of ___ . Status post sternotomy , bypass surgery and mitral valve replacement , unchanged as before . Similarly unchanged position of previously described left - sided PICC line . During the latest examination interval , a left - sided VATS procedure has been performed and two chest tubes have been placed . One of these follows the diaphragmatic contour and reaches close to the lower mediastinal area . The second chest tube also advanced from the lower left lateral wall , is directed in cranial direction and terminates in suprahilar position . The remaining left lung tissue remains well aerated and there is no evidence of any significant pneumothorax . The previously present sizeable massive left - sided pleural density has been evacuated . Degree of mediastinal shift towards the right has improved .
    OUTPUT:
    
Successful evacuation of massive pleural density , chest tubes in appropriate position and no evidence of significant pneumothorax .