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 ___ ___ . Again , borderline heart size is noted without typical configurational abnormality . Unremarkable appearance of thoracic aorta . The pulmonary vasculature demonstrates a mild upper zone redistribution pattern , but there is no evidence of interstitial or alveolar edema . No evidence of acute pulmonary parenchymal infiltrates is present , and the lateral and posterior pleural sinuses are free from any fluid accumulation . No pneumothorax in the apical area . Skeletal structures of the thorax are unchanged and grossly unremarkable .
    OUTPUT:
    
Borderline heart size but stable . Mild upper zone redistribution pattern suggestive of mild chronic pulmonary congestion . Findings are stable and not advanced . No evidence of acute infiltrates .