Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . There is status post sternotomy as before . The presence of multiple surgical clips in the left - sided anterior mediastinum is indicative of previous bypass surgery . The heart size is not enlarged . No typical configurational abnormality is present . Thoracic aorta mildly widened and elongated , but without local contour abnormalities . The pulmonary vasculature is not congested . No signs of pleural effusion as the lateral and posterior pleural sinuses are free . No acute parenchymal infiltrates . Similar as on preceding examination , there is some hazy crowding of the left cardiac contour identified as pleural thickening on the lateral view . These findings are completely unchanged and most likely represent postoperative scar formations related to cardiac surgery . Do not represent any acute pulmonary infiltrate .
    OUTPUT:
    
No signs of active pleural or parenchymal abnormalities . No signs of pericardial effusion on lateral view .