Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided tripolar pacemaker / defibrillator with 3 leads terminating in the coronary sinus , right atrium and right ventricle are unchanged . Since the prior exam , there is development of small bilateral pleural effusions and mild interstitial edema . The cardiomediastinal silhouette is stable with atherosclerotic calcifications along the aortic knob . No pneumothorax is seen . No convincing evidence for pneumonia . Bony structures are intact .
    OUTPUT:
    
Mild pulmonary edema and probable small bilateral pleural effusions .