Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly with a globular morphology is new compared to prior examinations from ___ , findings highly suggestive of interval development of a large pericardial effusion . Distension of the azygous vein is also noted . The visualized lung parenchyma appears clear . Left lower lobe atelectasis is likely given mass effect from the pericardial fluid . There is no pneumothorax . Mediastinal and hilar contours are within normal limits . No large pleural effusions are evident .
    OUTPUT:
    
Interval development of severe cardiomegaly , findings concerning for a new pericardial effusion . Dr . ___ communicated the above results to Dr . ___ at 12 :46 a .m . on ___ by telephone .