Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . Cardiomediastinal and hilar contours are unchanged . A dual lead pacemaker device is present , with leads ending in the right atrium and right ventricle . The patient is status post median sternotomy , with intact sternotomy wires . A mitral valve replacement is present . No pneumothorax , pleural effusion , or consolidation .
    OUTPUT:
    
No acute cardiopulmonary process .