Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size is mildly enlarged but stable . There is no evidence of vascular engorgement nor pulmonary edema . The aorta is again tortuous . On the lateral view , there is a possible suggestion of a pericardial effusion , likely a chronic finding . The lungs are clear .
    OUTPUT:
    
Normal volume status . Possible pericardial effusion .