Prolapsing Chiari malformation in tricuspid regurgitation: a moving filling defect in the inferior vena cava.


A membranous flap was observed during systole within the superior portion of the inferior cava in four patients who did not have either an indwelling catheter or a filtering device. In these cases, multiple views established that this line was not an artifact. Subcostal scans of the right atrium demonstrated a typical Chiari malformation. A diagnosis of… (More)


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