Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Postoperative mediastinum is stable . Cardiomegaly is increased from ___ . Bibasilar atelectasis and mild pulmonary edema are increased from ___ . Left lower lobe opacity is worse than on ___ . Right internal jugular central venous catheter is unchanged . No pneumothorax .
    OUTPUT:
    
1 . Moderate - to - large left pleural effusion increased from ___ . 2 . Severe cardiomegaly with only mild pulmonary edema suggest the possibility of a pericardial effusion . If clinical concern echocardiogram could further evaluate .