Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is upper zone redistribution and slight vascular plethora , without definite change compared with ___ . Cardiomediastinal silhouette is unchanged . Sternotomy wires again noted . Swan - Ganz catheter tip overlies the proximal right pulmonary artery , slightly retracted compared to prior . The left - sided cardiac device and leads are unchanged .
    OUTPUT:
    
Probable mild vascular plethora . This is increased compared with ___ , but not clearly changed compared with ___ . No focal infiltrate , gross effusion , or pneumothorax detected .