Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires are intact and aligned . A right subclavian central venous catheter terminates in the low SVC . A Swan - Ganz catheter terminates in the proximal right pulmonary artery . A feeding tube terminates in the stomach . Stable retrocardiac airspace opacification is most likely due to subsegmental atelectasis . Marked cardiomegaly despite the projection is unchanged . There is minimal pulmonary edema if any . Small left pleural effusion is unchanged .
    OUTPUT:
    
No significant interval change and marked cardiomegaly and retrocardiac subsegmental atelectasis . Stable small left pleural effusion .