Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal view of the chest was obtained . Leads of a left - sided pacer terminate in the right atrium and ventricle . Moderate cardiomegaly with calcification of the aortic knob are stable . Hyperinflated lungs are consistent with chronic obstructive pulmonary disease . Interstitial lung markings are increased , consistent with mild pulmonary edema . Retrocardiac and right lung base opacities may represent a combination of atelectasis and effusion .
    OUTPUT:
    
Mild pulmonary edema with bibasilar atelectasis . Stable moderate cardiomegaly .