Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Left mid to lower lung scarring / atelectasis is re - demonstrated . Bibasilar atelectasis is seen . Moderate cardiomegaly persists . Mediastinal contours are stable .
    OUTPUT:
    
Cardiomegaly without overt pulmonary edema . Left mid to lower lung atelectasis / scarring . Bibasilar atelectasis .