Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Left - sided pacemaker device is noted with leads terminating in the right atrium and right ventricle , unchanged . The heart remains mildly enlarged but stable . The aorta is unfolded . There is mild pulmonary vascular congestion , which is improved when compared to the prior exam . No new focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion , improved when compared to the prior exam .