Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal heart size , mediastinal and hilar contours . A left chest wall dual lead pacer is in unchanged positions with leads in the expected location of the right atrium and right ventricle . No focal consolidation , pleural effusion or pneumothorax . Mild hyperinflation of the lungs . No pulmonary edema .
    OUTPUT:
    
No evidence of volume overload