Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and mitral valve replacement . Moderate cardiomegaly is unchanged with pronounced left atrial enlargement . Hilar contours remain prominent . Lung volumes are low . There is crowding of the bronchovascular structures , with probable mild pulmonary vascular congestion . No focal consolidation , pleural effusion or pneumothorax is visualized . No acute osseous abnormality is seen .
    OUTPUT:
    
Cardiomegaly with mild pulmonary vascular congestion .