What are the collateral pathway anatomic findings on coronary computed tomography angiography (CCTA)?

Updated: Dec 21, 2017
  • Author: Eugene C Lin, MD; Chief Editor: Eugene C Lin, MD  more...
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Collateral pathways are typically better visualized on invasive coronary angiography than on CCTA. There is a large number of potential collateral pathways.( [72] )

Two "named" collateral pathways are the following:

  • Kugel's artery [73] : Connects an anterior artery (typically the circumflex) with a posterior artery (typically the RCA) at the crux (junction of the posterior interventricular and AV grooves) of the heart. This may connect with the AV nodal artery and supply the AV node.

  • Arc of Vieussens'/Vieussens' ring [74] : Connects the RCA (typically via the conus artery) with the LAD.

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