Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There are bilateral interstitial opacities with a perihilar distribution , with associated bilateral hilar engorgement and small pleural effusions . Slightly increased right basial opacity is also seen . There is no pneumothorax . Moderate cardiomegaly is unchanged from prior . A bicameral pacemaker is re-identified with the leads in unchanged position . Sternotomy wires are intact .
    OUTPUT:
    
Pulmonary edema with moderate cardiomegaly . Increased right basilar opacity at the right lung base may represent atelectasis , although infection can not be excluded .