Left Coronary Artery in Korean

Patterns of branches and distributions of left coronary artery in Korean adult hearts were observed at the viewpoint of newly edited Nomina Anatomica, and the results were as follows. The left aortic sinus had only one orifice in all cases. The left coronary artery had mural coronray in 65% of cases. Type 3 of ramus interventricularis anteror was most frequent. Ramus coni arteriosi from the left coronary artery was more underdeveloped than that from right coronary artery. Right anterior ventricular branch was absent frequently, but when it was present it was composed of 1-2 small vessels. The left anterior ventricular branch was composed 2-5. It was difficult to define diagonal branch, and was present in 90% of cases. Type 3 of ramus circumflexus was most frequent. The ramus artrialis anastomoticus was present in 90% of cases. The rami atrialis could be divided into anterior and posterior group and incidence was only 47.5% and 30% respectively. The ramus marginalis sinister was present in 77.5% of cases. The anterior and posterior ventricular branch was composed of 1-3 and 1-4 respectively. The ramus posterior ventriculi sinistri was present in 82.5% of cases. Based on these results, the author depict typical arrangement of the left coronary artery in Korean.