Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is persistent visualization of a moderate right pneumothorax and small to moderate right pleural effusion . A right - sided chest drain is in - situ , unchanged in position and appearance when compared to the prior study . There is a right basilar atelectasis . The left lung remains grossly clear . The heart is enlarged , stable compared to the prior study . Previous median sternotomy noted , the sternal wires are unchanged in appearance . Previous mitral valve replacement noted .
    OUTPUT:
    
No significant interval change when compared to the prior study . Persistent visualization of the right apical pneumothorax .