Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right IJ catheter is unchanged with tip ending in atriocaval junction . Left pleural drain has been removed . Lung volumes are low with new opacification of the left base for left lower lobe atelectasis , but no pelural effusion . Heart size is still enlarged . Mediastinal contours are still mildly enlarged after CABG surgical procedure . There is no pneumothorax .
    OUTPUT:
    
New left lower lobe atelectasis . There is no pneumothorax .