Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient had a sternotomy for AVR and CABG . Left lower lobe atelectasis and small pleural effusion have slightly improved . Right minimal atelectasis and effusion have also improved . Residual subcutaneous air is seen in the left lower neck . There is no pneumothorax . Mediastinal and cardiac contours are mildly enlarged and unchanged . Coronary artery stents are seen on the lateral view .
    OUTPUT:
    
Improvement of expected findings after recent cardiac surgery with bilateral atelectasis , pleural effusion , more prominent on the left Side .