Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Lung volumes are low . The heart size is mildly enlarged but unchanged . The mediastinal and hilar contours are unremarkable , with mild pulmonary vascular engorgement noted , slightly increased compared to the prior study . No pleural effusions , focal consolidations or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary vascular congestion , increased compared to the prior exam . No focal consolidation to suggest pneumonia .