Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a left upper chest pacer device with associated dual leads in unchanged appropriate position overlying the right ventricle and right atrium . The cardiomediastinal silhouettes are unchanged , consistent with stable mild cardiomegaly . The bilateral hila are unremarkable . There is no right pleural effusion . There is blunting of the left costophrenic angle , consistent with a small left pleural effusion . There is a retrocardiac opacity and silhouetting of the left hemidiaphragm , likely representing basilar atelectasis in the setting of ipsilateral pleural effusion . There is no evidence of pulmonary edema . There is no pneumothorax .
    OUTPUT:
    
1 . Small left pleural effusion likely with adjacent left basilar atelectasis . 2 . Stable mild cardiomegaly . No pulmonary edema .