Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left anterior chest wall dual lead pacer , median sternotomy wires and surgical clips are unchanged . Heart size is mildly enlarged . Mediastinal and hilar contours are unremarkable . Lungs are clear with improved aeration of the left lung base . There are tiny bilateral pleural effusions . There is no pneumothorax .
    OUTPUT:
    
Unremarkable postoperative examination with improved aeration of the left lung base and tiny residual bilateral pleural effusions .