Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The patient is status post median sternotomy and cardiac valve replacement . Again seen is a small left pleural effusion with overlying atelectasis , left base consolidation is difficult to exclude . Again seen is slight prominence of the central pulmonary vasculature . A trace right pleural effusion may also be present . Mild interstitial edema is again seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Small left pleural effusion with overlying atelectasis . Possible trace right pleural effusion . Cardiomegaly and minimal interstitial edema . Constellation of findings suggests congestive heart failure .