Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is massive cardiomegaly , which may also represent a very large pericardial effusion . Left basilar opacity may reflect atelectasis , but infection is not excluded . There is no pneumothorax . Obscuration of the left lung base makes a left pleural effusion hard to exclude . There is no pulmonary vascular congestion and the vascular pedicle is not widened .
    OUTPUT:
    
Massive cardiomegaly , most consistent with a large pericardial effusion . No evidence of pulmonary edema . Left basilar opacity could reflect atelectasis , though infection is not excluded . A small left pleural effusion may be present . Findings were relayed by Dr . ___ to Dr . ___ by phone at 10 :43 a .m . on ___ . Time of identification was approximately 10 :40 a .m . .