Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in upright position . Comparison is made with the next preceding similar study of ___ . There is status post sternotomy . Multiple surgical clips in the left - sided mediastinal structures are indicative of previous bypass surgery . The heart is moderately enlarged . Thoracic aorta is of ordinary ___ but rather elongated and shows advanced walled calcifications at the level of the arch . Pulmonary vasculature shows an upper zone re-distribution pattern . No evidence of interstitial or alveolar edema . No acute parenchymal infiltrates can be identified , and the lateral pleural sinuses are free from any fluid accumulation . Comparison is made with the next preceding chest examination obtained ___ month ago . Cardiovascular findings are grossly unchanged ; however , bilateral basal patchy parenchyma on the bases indicated the presence of bronchopneumonic infiltrates . These parenchymal changes are not present anymore .
    OUTPUT:
    
Moderate cardiac enlargement with evidence of mild degree of chronic pulmonary congestion status post bypass surgery . No evidence of acute parenchymal infiltrates or pleural effusion as can be identified on single AP chest view .