Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is interval placement dual lead left - sided pacemaker with leads extending the expected positions of the right atrium and right ventricle . Right base opacity may represent combination of moderate pleural effusion and atelectasis , however , underlying pneumonia is not excluded . . No large left pleural effusion is seen . There is no left - sided consolidation . There is mild interstitial edema . The cardiac silhouette remains mildly enlarged . The aorta is calcified and tortuous .
    OUTPUT:
    
Right base opacity may represent combination of moderate pleural effusion and atelectasis , however , underlying pneumonia is not excluded . Mild interstitial edema .