Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval repositioning of the Swan - Ganz catheter which now projects over the main pulmonary outflow tract . This patient is status post median sternotomy and mitral valve repair . Low bilateral lung volumes . Bilateral pleural effusions with overlying atelectasis , greater on the left . No pneumothorax identified . The size the cardiac silhouette is enlarged but unchanged .
    OUTPUT:
    
Interval repositioning of the Swan - Ganz catheter , the tip which now projects over the main pulmonary outflow tract . No other significant interval change since the prior examination .