Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right IJ central venous catheter ends in the proximal right atrium . Median sternotomy wires are present . There is a small left pleural effusion . The cardiac silhouette is enlarged with a indistinct left cardiac border . Mediastinal clips are present . There is mild interstitial edema .
    OUTPUT:
    
Small left pleural effusion with indistinctness of the cardiac border , likely not significantly changed from prior .