05.01.21 – Divided right atrium (cor triatriatum dexter)

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IPCCC Term DIVIDED RIGHT ATRIUM (COR TRIATRIATUM DEXTER)

IPCCC Code 05.01.21

ICD-11 Code PENDING

Synonyms PENDING

Abbreviations PENDING

IPCCC Definition A congenital cardiac malformation in which the right atrium is partially divided by a large or obstructive Eustachian valve.

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[su_carousel source=”media: 6248,6249″ limit=”27″ width=”460″ height=”510″ responsive=”no” items=”1″ title=”no” centered=”no” mousewheel=”no” autoplay=”0″] The images are from the same heart and demonstrate a right atrium which is partially divided by a large, nearly obstructive Eustachian valve. In the first image, the large Eustachian valve is attached to a prominent terminal crest. The terminal crest is free standing as it crosses the opening of the superior caval vein (black arrow). Only the anterior-most portion of the oval fossa can be visualized. In the second image, the venous component of the right atrium shows the normal connections of the superior and inferior caval veins. The oval fossa is easily visualized along with the prominent Eustachian valve that nearly divides the right atrium.

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