Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Left - sided pacemaker device is re - demonstrated with leads terminating in the right atrium and anterior right ventricle , towards the origin of the pulmonary outflow tract , unchanged . Right - sided volume loss is re - demonstrated with rightward shift of mediastinal structures . Small to moderate size right pleural effusion with pleural thickening is again demonstrated . Heart size is mildly enlarged . Mediastinal and hilar contours are unchanged . Mild asymmetric right pulmonary edema is re - demonstrated , similar to the prior study . Left lung is clear . No pneumothorax or left - sided pleural effusion is demonstrated .
    OUTPUT:
    
No substantial interval change from the prior study . Chronic right - sided volume loss with small to moderate right pleural effusion and pleural thickening and mild asymmetric right pulmonary edema .