Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Left - sided dual - chamber pacemaker device is re - demonstrated with leads terminating in the right atrium and right ventricle . Moderate cardiomegaly is similar when compared to the prior study . There is mild pulmonary vascular congestion , not substantially changed from prior . Small bilateral pleural effusions are re- demonstrated , though the previously seen fluid tracking in the right minor fissure is less evident on the current exam . Bibasilar airspace opacities are present , and may reflect atelectasis but infection can not be excluded . There is no pneumothorax . No acute osseous abnormality is visualized .
    OUTPUT:
    
Mild congestive heart failure , not significantly changed in the interval with small bilateral pleural effusions . Bibasilar patchy airspace opacities likely reflect atelectasis though infection can not be completely excluded .