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Fig. 2B —59-year-old woman with massive pulmonary embolism. Transverse
contrast-enhanced chest CT images at level of left atrium obtained before
treatment for massive pulmonary embolism (A) show enlargement of right
atrial appendage, superior vena cava, and small size of left atrial appendage
and left atrium compared with image after treatment of massive pulmonary
embolism (B).