Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A central venous catheter terminates in the right atrium . The patient is status post sternotomy and probably coronary bypass surgery . Surgical clips also project over the epigastric region . The heart is enlarged . The aorta is calcified . The mediastinal and hilar contours appear unchanged . A mild interstitial abnormality appears unchanged with areas of suspected subpleural scarring along the right lower hemithorax . There is no pneumothorax . Trace pleural effusions are suspected .
    OUTPUT:
    
Stable appearance of the chest with peripheral interstitial changes which may reflect persistent pulmonary congestion , although potentially a more chronic abnormality that has arisen since ___ .