Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is evidence of prior cardiac surgery seen by mediastinal surgical clips and median sternotomy wires . The heart is moderately enlarged and lung volumes are decreased . Pulmonary vascular and central venous congestion is noted . Retrocardiac opacity may represent atelectasis or pneumonia . No large pleural effusion . The trachea is mildly deviated towards the right and narrowed , which may be secondary to chronic lung disease and displacement from the aorta , however displacement from a mediastinal mass is a possibility .
    OUTPUT:
    
- Pulmonary and central vascular congestion . - Moderate cardiomegaly - Retrocardiac opacity may represent atelectasis or pneumonia . - Narrowing and rightward deviation of the trachea may be a function of chronic lung disease and anatomic displacement of the aorta , however a mass , usually a descending goiter , could have the same appearance .