Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is status post sternotomy and presence of multiple surgical clips is indicative of previous bypass surgery . The heart is mildly enlarged with a configuration suggesting a left ventricular prominence . Mild left atrial enlargement is also present as seen on the lateral view . The thoracic aorta is mildly widened and elongated and demonstrates calcium deposits in the wall , mostly at the level of the arch . The pulmonary vasculature demonstrates an upper zone redistribution pattern . There is presently no evidence of interstitial or alveolar edema and the lateral and posterior pleural sinuses are free . No evidence of acute new parenchymal infiltrates are identified and no pneumothorax is seen in the apical area . When comparison is made with a single view chest examination of ___ , findings are grossly unaltered , but it is noted that the upper zone redistribution pattern was not present at that time .
    OUTPUT:
    
Mild cardiac enlargement and evidence of upper zone redistribution pattern in the pulmonary circulation suggestive of mild chronic pulmonary congestion . There is no radiographic evidence of emphysema , so the patient 's progressive shortness of breath is probably cardiogenic .