Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 07 :44 is submitted .
    OUTPUT:
    
Dual lead left - sided pacer is unchanged . Overall cardiac mediastinal contours are stable . Bilateral pleural catheters remain in place . No large pleural effusions are appreciated , although more focal opacity at the left base could reflect either lobar atelectasis or a loculated collection . There are stable patchy opacities at both bases suggestive of atelectasis . No pulmonary edema . No pneumothorax is appreciated .