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