Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker leads terminate in the right atrium and right ventricle and are in unchanged positions . Moderate enlargement of the cardiac silhouette size is stable . There are bilateral pleural effusions , moderate on the left , which is relatively unchanged , and small - to - moderate on the right , which appears increased when compared to the prior exam . Bibasilar airspace opacities may reflect atelectasis , but infection in these regions can not be excluded . There is no pulmonary vascular engorgement . No pneumothorax is present . No acute osseous abnormality is seen .
    OUTPUT:
    
Stable moderate - sized left , and increasing small - to - moderate right pleural effusions with bibasilar atelectasis . Infection at the lung bases is not excluded .