Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Old right pacemaker leads and a left pectoral generator are unchanged in appearance . Severe cardiomegaly is stable . Mild edema persists without evidence of pleural effusions . A small retrocardiac opacity is unchanged and has the appearance of atelectasis . There is no new consolidation . There is no pneumothorax . Sternal wires are intact .
    OUTPUT:
    
1 . Stable mild pulmonary edema . 2 . Stable severe cardiomegaly . 3 . Unchanged small retrocardiac opacity is most likely atelectasis .