Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate a single - lead pacemaker device in unchanged position , with intact median sternotomy wires , mediastinal clips , and aortic calcifications , unchanged since prior study . There are multiple Kerley B lines seen bilaterally , and overall prominence of the interstitial markings , increased since the prior study . No focal consolidation is present , and there is no large pleural effusion . Mild cardiomegaly is stable .
    OUTPUT:
    
Moderate interstitial edema , increased compared to the prior study .