Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The heart is mild to moderately enlarged . The mediastinal and hilar contours appear not significantly changed . Vague patchy opacity in the lingula has resolved , although there is now patchy opacity obscuring the left hemidiaphragm , probably due to minor atelectasis . Diaphragms are flattened suggesting hyperinflation . This examination shows mild interstitial abnormality including prominent upper zone redistribution of pulmonary vascularity suggesting mild vascular congestion . There is no pleural effusion or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
Findings with mild to moderate pulmonary vascular congestion and cardiomegaly .