Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Right - sided pacemaker device is noted with leads terminating in the right atrium and right ventricle . Dual lumen central venous catheter tip terminates in the proximal right atrium . Heart size is moderately enlarged . Lung volumes are low . The aorta is diffusely calcified . Hilar contours are normal . There is no pulmonary vascular congestion . Mild bibasilar atelectasis is present . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild bibasilar atelectasis .