Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . The patient is status post median sternotomy and CABG . A left pectoral AICD is in place with lead terminating in the right ventricular apex . No focal opacity is identified . Prominent interstitial markings are unchanged . The cardiomediastinal silhouette is moderately enlarged . Hilar contours are stable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No focal opacity . Prominent interstitial markings appear to be chronic , likely due to combination of interstitial edema and chronic interstitial disease as previously characterized on chest CT from ___ . 2 . Stable moderate cardiomegaly .