Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device is noted with leads terminating in the right atrium and right ventricle . Moderate enlargement of the cardiac silhouette is present . The mediastinal contours are unremarkable . Diffuse alveolar opacities in a perihilar distribution are compatible with moderate pulmonary edema . There is likely a trace left pleural effusion . No pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Moderate pulmonary edema and probable trace left pleural effusion .