Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral pacemaker is visualized with leads in appropriate positioning . Mild - to - moderate pulmonary edema . Moderate - sized left pleural effusion with associated bibasilar atelectasis . Right basilar opacification may represent pleural fluid and atelectasis , however an underlying pneumonia is difficult to exclude . Stable enlargement of the cardiomediastinal silhouette . No pneumothorax .
    OUTPUT:
    
1 . Mild to moderate pulmonary edema . 2 . Stable moderate left pleural effusion . 3 . Right basilar opacification may represent pleural fluid and atelectasis , however an underlying pneumonia is difficult to exclude . 4 . Stable enlargement of the cardio mediastinal silhouette .