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 ___ . Heart size remains normal . No configurational abnormality is present . Thoracic aorta unchanged . The pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present and the lateral and posterior pleural sinuses remain free . No pneumothorax in apical area . On previous examination identified minimal linear scar formations on the left lung base remain unchanged .
    OUTPUT:
    
No cardiac enlargement in patient with history of paroxysmal atrial fibrillation and no evidence of amiodarone pulmonary toxicity .