Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are fully expanded and clear . No pleural abnormalities . Heart size is normal . Cardiomediastinal and hilar silhouettes are normal . There are mild aortic arch calcifications . A left pectoralis dual - chamber pacemaker is noted with leads terminating in the right atrium and right ventricle .
    OUTPUT:
    
No acute cardiopulmonary abnormality .