Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD device is noted with single lead terminating in the right ventricle . The patient is status post median sternotomy and aortic valve replacement . The heart remains moderate to severely enlarged . The aorta is tortuous . Chronic interstitial opacities are again demonstrated , most pronounced within the upper lobes , left greater than right . Patchy opacities within the lung bases may reflect areas of atelectasis though regions of developing infection or aspiration can not be completely excluded . There is no pleural effusion or pneumothorax . No acute osseous abnormality is identified .
    OUTPUT:
    
Chronic interstitial abnormality with upper lobe predominance , most pronounced within the left upper lobe , which on the prior chest CT was suggestive of either sarcoidosis , chronic hypersensitivity pneumonitis , or NSIP . Patchy opacities in the lung bases may reflect areas of atelectasis though infection or aspiration are not excluded .