Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and mitral valve replacement . The heart is moderate to severely enlarged , with pronounced left atrial enlargement . Moderate to severe alveolar pulmonary edema has developed , with small bilateral pleural effusions likely present . No pneumothorax is seen . Retrocardiac opacity likely reflects atelectasis . No acute osseous abnormalities are seen .
    OUTPUT:
    
Moderate to severe pulmonary edema with probable small bilateral pleural effusions .