Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . A dual - lead pacemaker / ICD device appears unchanged . The mediastinal and hilar contours appear unchanged . The heart appears mildly enlarged . A widespread interstitial abnormality suggests mild vascular congestion . Although there is increased relative opacification of the left mid lung compared to the right , an asymmetric pattern of pulmonary edema has been seen on prior radiographs such as ___ .
    OUTPUT:
    
Findings most suggestive of mild - to - moderate interstitial pulmonary edema .