Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again noted is prior median sternotomy and mitral valve repair . The median sternotomy wires are intact . Small dependent pleural effusions and mild left lower lobe atelectasis are stable . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . There is no change in heart size . There is no pulmonary edema , pleural effusion , or pneumothorax .
    OUTPUT:
    
Mild left lower lobe atelectasis and small bilateral pleural effusions unchanged from 3 days prior .