Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . Left - sided AICD / pacemaker device is noted with leads terminating in the right atrium , right ventricle , and coronary sinus . Heart size remains mildly enlarged . The aorta is tortuous and diffusely calcified . There is no pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is seen . There is minimal atelectasis in the lung bases . No acute osseous abnormalities present .
    OUTPUT:
    
Mild bibasilar atelectasis .