Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate stable left pectoral cardiac pacer with leads terminating in the right atrium and right ventricle . The cardiomediastinal silhouette is unremarkable . The lungs are clear with the exception of trace left basilar atelectasis . There is no pneumothorax , vascular congestion , or pleural effusion .
    OUTPUT:
    
Mild left basilar atelectasis . No confluent consolidation to suggest pneumonia .