Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 lead left - sided pacemaker is stable in position , with leads extending to the expected positions of the right atrium and right ventricle . . There is persistent enlargement of the cardiac silhouette . Mediastinal contours are stable . Right base opacity is stable representing combination of pleural effusion and atelectasis , underlying consolidation not excluded . Trace left pleural effusion may be present . Mild interstitial edema noted on the prior study has improved in the interval .
    OUTPUT:
    
Stable right base opacity representing combination of pleural effusion and atelectasis , underlying consolidation not excluded . Possible trace left pleural effusion . Interval improvement in previously seen mild interstitial edema .