Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . A dual - lead pacemaker / ICD device appears unchanged with leads terminating in the right atrium and ventricle , respectively . The cardiac , mediastinal and hilar contours appear stable . There is no focal opacity . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No significant change . No evidence of acute disease .