Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy with aortic valve replacement . Lungs lungs are low . Small bilateral layering pleural effusions are unchanged with new presence of fluid layering within the minor fissure . The upper lung fields demonstrate persistent mild pulmonary edema . Left midlung linear atelectasis has resolved . There is no pneumothorax . The heart appears enlarged despite the projection . Chronic compression deformities of two lower thoracic vertebral bodies are unchanged .
    OUTPUT:
    
Stable mild pulmonary edema with stable small bilateral pleural effusions . Stable cardiomegaly .