Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 21 :31 is submitted .
    OUTPUT:
    
Three right - sided chest tubes remain in place with decrease in the loculated basilar hydropneumothoraces and some interval improvement in aeration at the right base . There continues to be stable volume loss within the right hemithorax . The left lung remains well inflated with streaky opacity in the left costophrenic angle likely reflecting scarring or subsegmental atelectasis . No pneumothorax is appreciated . The heart is stably enlarged most likely reflecting cardiomegaly , although a pericardial effusion can not be excluded . The patient is status post median sternotomy with valve replacement . No pulmonary edema or left effusion .