Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , there is a new left pectoral cardiac pacing device with single lead following its expected course to the right ventricle . No pneumothorax . Mild pulmonary edema has slightly improved . Mild bibasilar opacities have decreased with less obscuration of the left heart border , most consistent with atelectasis . No appreciable pleural effusions . Mild cardiomegaly . Left lateral rib fractures are noted .
    OUTPUT:
    
1 . Interval placement of left pectoral cardiac pacing device with single lead following its expected course to the right ventricle . No pneumothorax . 2 . Improved mild pulmonary edema . 3 . Improved mild bibasilar atelectasis .