Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual lead left - sided pacer is unchanged in position . As before , the heart is mildly enlarged . The cardiomediastinal and hilar contours are within normal limits . Lung volumes are low which accentuates bronchovascular markings . There is bibasilar atelectasis without focal consolidation , pleural effusion or pneumothorax .
    OUTPUT:
    
Prominent lung markings and bibasilar atelectasis . No pneumothorax . No significant change from the prior exam .