CARAT Case Studies: Coronary Artery Variants and Anomalies (CAVA)

Case Study A02-2: LCA from RC Sinus - Course Low between PA and Ao

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LCA_LAO 27 Cran 28
Large axially directed SP; note the axial variant of the diagonal branch as well.

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LCA_RAO 30 Cran 30
Large axial perforator supplies entire septum with collaterals to occluded PDA; size 3 PL RCA branch seen.

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RCA_LAO 31 Cran 13
Total RCA occlusion with bridging collaterals but primary collateral support from anomalous perforator to PDA.

Anatomy – An anomalous LCA origin from the RC Sinus can follow a pathway anterior to PA or behind the aorta, but most commonly between the PA and aorta.  In this position two variants are seen: a pathway high on the coronary sinus, and a pathway low on sinus close to the septum is most common (seen in this example).

Construction - (Select Settings > Choose Button Q Nums.) Q1.4.2 template is used.

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