Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . The patient is status post median sternotomy and CABG . The lungs are hyperinflated , flattening of the diaphragms , suggesting chronic obstructive pulmonary disease . There is left basilar atelectasis . No definite focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
COPD . Left basilar atelectasis .