Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal lateral views of the chest . And external fixation device remains status post aortic valve replacement . The cardiac and mediastinal contours are stable . Mild vascular congestion is relatively unchanged since ___ . No new focal opacity identified . Small bilateral effusions have decreased since ___ . No pneumothorax is identified .
    OUTPUT:
    
Stable mild vascular congestion and cardiomegaly . Interval decrease in small bilateral pleural effusions .