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Fig. 3A —CT and echocardiographic images from 44-year-old man with
patent foramen ovale (PFO). RA = right atrium, LA = left atrium. Coronal
oblique CT image shows characteristic findings of PFO with left atrial flap
(black arrow), continuous contrast column connecting the left and
right atria, and jet of contrast material diffusing out into right atrium
(white arrow).