Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A dual - lead pacemaker / ICD device with leads terminating in the right atrium and ventricle , respectively , appears unchanged . The patient is also status post coronary artery bypass graft surgery . The heart is mildly enlarged , as before . The lungs appear clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease .