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. 2016 Feb 3;18(2):224–235. doi: 10.1093/ehjci/jev323

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Published by Oxford University Press on behalf of the European Society of Cardiology 2016. This work is written by US Government employees and is in the public domain in the US.

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ACAOS course subtype stratified by the prevalence of CTA-identified ostia type. Note the most common take-off of an interarterial ARCA is a separate ostia. *Note here that numbers do not add to 100% given indeterminate take-offs resulting from a bioprosthetic valve limiting take-off visualization in one patient with interarterial ARCA, and misalignment artefact in one patient with a retroaortic left circumflex. Subtype images obtained by multiplanar axial reconstructions at the level of the ACAOS ostium using the smallest available slice thickness (0.5–0.625 mm).