What coronary anatomy is relevant to 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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The left anterior descending artery (LAD) and posterior descending artery (PDA) run in the interventricular groove, while the circumflex and right coronary arteries (RCA) run in the atrioventricular groove. [67, 68, 69]

In general, hypoplasia of one vessel will be accompanied by prominence of another vessel. For example, if the LAD is small and does not extend to the apex, the PDA is typically prominent and extends to the apex. If the circumflex is small, there are typically prominent posterolateral branches arising from the RCA. If there is a large ramus intermedius, the diagonals may be small. [67, 68, 69]

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