Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright AP radiograph demonstrates severe cardiomegaly , worsened from ___ . There is redistribution of pulmonary vascularity to the upper zones but no evidence of overt pulmonary edema . There is no pneumothorax . Atherosclerotic calcifications are noted in the aortic arch . Splaying of the mainstem bronchi likely represents left atrial enlargement .
    OUTPUT:
    
Severe cardiomegaly , worsened from ___ .