Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest film ___ at 21 :43 is submitted .
    OUTPUT:
    
Dual lead left - sided pacer remains in place . The left humeral prosthesis is incompletely visualized . There continue be layering bilateral effusions with patchy airspace process at both base suggestive of patchy lower lobe atelectasis , although pneumonia can not be excluded . There continues to be mild perihilar and interstitial edema . Heart remains stably enlarged . Lung apices are obscured by the patient 's mandible . No pneumothorax .