Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post aortic valve replacement and median sternotomy with the wires intact . The lung volumes are lower , resulting in new mild bibasilar atelectasis ; otherwise , no focal consolidations concerning for pneumonia are identified . There is no pleural effusion or pneumothorax . The cardiomediastinal contours are stable . Mild cardiomegaly is persistent compared to exams dated back to ___ .
    OUTPUT:
    
No evidence of a pneumothorax status post lead revision . These findings were discussed with Dr . ___ by Dr . ___ by phone at 9 :___ a .m . on the day of the exam .