Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is slightly limited by patient rotation . The patient is status post median sternotomy , aortic valve replacement , and CABG . Moderate cardiomegaly is present . There is a moderate size hiatal hernia . Lung volumes are low which causes crowding of the bronchovascular structures . Mild pulmonary edema is present along with small bilateral pleural effusions . Patchy opacities in the lung bases may reflect areas of atelectasis though infection or aspiration can not be excluded . No pneumothorax is identified . There are multilevel degenerative changes with bridging anterior osteophytes compatible with DISH .
    OUTPUT:
    
Mild congestive heart failure with small bilateral pleural effusions and mild pulmonary edema . Bibasilar patchy opacities , likely atelectasis but infection or aspiration can not be excluded .