Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Unchanged left chest wall single lead AICD . The patient is status post prior median sternotomy and CABG . There is no focal consolidation , pleural effusion or pneumothorax identified . Unchanged left basilar scarring / atelectasis . The size of the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Unchanged scarring at the left lung base . No radiographic evidence of acute cardiopulmonary disease .