Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Compared to the prior study of ___ , prominence of the pulmonary vasculature is relatively unchanged . Otherwise , the lungs are clear . Moderate - to - severe cardiomegaly has slightly increased . The mediastinal contours are normal . No pleural effusion or pneumothorax .
    OUTPUT:
    
Moderate - to - severe cardiomegaly has increased since ___ . Pulmonary vascular congestion is relatively stable .