Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Right - sided pacemaker device with leads terminating in right atrium and right ventricle is in unchanged position . The pulmonary vasculature is normal . Lungs are clear . A small hiatal hernia is noted . No pleural effusion or pneumothorax is present .
    OUTPUT:
    
Small hiatal hernia . No acute cardiopulmonary abnormality .