Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate cardiomegaly . The patient is status post cardiac surgery . There is left retrocardiac atelectasis as well as a possible small left pleural effusion vs skin fold . No focal airspace opacity is seen otherwise . Mild pulmonary vascular engorgement is present . No frank pulmonary edema . There is no pneumothorax .
    OUTPUT:
    
1 . Moderate cardiomegaly and pulmonary vascular engorgement . 2 . Small left pleural effusion vs skin fold and left lower lobe atelectasis .