Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 12 :40 is submitted .
    OUTPUT:
    
Left - sided pacer remains in place and unchanged in position . Overall cardiac and mediastinal contours are stable . Lungs appear well inflated without evidence of focal pneumonia , pleural effusions , pulmonary edema , or pneumothorax .