Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Appearance of the median sternotomy wires are unchanged . Again noted is the biventricular ICD implant ; one lead is seen in the right atrium , a second lead within the right ventricle but the tip of the third lead is not well visualized . There is slight improvement of underlying pulmonary edema compared to ___ . Again noted is a small left pleural effusion . The heart is enlarged . No evidence of pneumothorax .
    OUTPUT:
    
1 . Interval biventricular ICD placement . No evidence of pneumothorax . 2 . Slight improvement in pulmonary edema .