Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual lead left - sided pacer is stable in position . There is persistent severe enlargement of the cardiac silhouette . The mediastinal contours are stable . Aortic knob calcification is again seen . There is blunting of the bilateral posterior costophrenic angles raising concern for trace bilateral pleural effusions . Left basilar opacity is seen which may in part be due to overlying soft tissue and elevated left hemidiaphragm . No pneumothorax seen .
    OUTPUT:
    
Trace bilateral pleural effusions . Marked enlargement of the cardiac silhouette persists . No definite pulmonary edema .