Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is unchanged . The hilar and mediastinal contours are normal . Moderate interstitial edema , with more confluent opacification at the left base , has slightly worsened since the prior study . A small left pleural effusion is unchanged . A left chest wall AICD device is seen with leads in expected position of the right atrium and right ventricle . Two upper sternotomy wires remain disrupted . Two epicardial leads are also unchanged in position .
    OUTPUT:
    
Mild worsening of interstitial pulmonary edema .