Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unchanged mild bibasilar atelectasis , and bilateral moderate pleural effusion right greater than left . A left chest pacemaker and its atrial and ventricular leads are in standard position . Patient is status post median sternotomy and AVR .
    OUTPUT:
    
Little change in bibasilar atelectasis and bilateral moderate pleural effusions .