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Morphological Studies on the Arteries of the Korean Heart

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KMID : 0365819720120010125

### Abstract

Coronary arteries on the Korean cadaver hearts were morphologically examined of branches, distribution, length and diameter.

One hundred and thirty four hearts were examined, fifty one from males, reventt from females and thirteen unclassified as to sex. The following results were obtained.

1. The adipose artery originated directly from the aorta in 35.8% of cases.

2. The right coronary arteries originated from inside of the aortic sinus in 53.7% of cases, at the borer of the aortic sinus in 40. 3% and outside of the aortic sinus in 6%. The left coronary arteries originated from inside of the aortic sinus in 55.2% of cases, at the borCer of the aortic sinus in 39.6% and outside of the sinus in 5. 2%.

3. As to the diameter of the right and left coronary arteries, 72. 0% of them had larger left coronary arteries and 19.7% of them larger right coronary arteries. 29.5% of them had the anterior interventricular branch larger in diameter than the circumflex branch. On the contrary, 59.8% of them had the circumflex branch larger in diameter than the anterior interventricular branch. Comparing the right coronary artery and the circumflex branch, 68.8% of them had a larger right coronary artery than circumflex branch, 20. 5% of them had a larger circumflex branch than right coronary artery.

4. The furcation of the main stem of the left coronary -artery was such that 53. 0% of them had bifurcated, 4-1.0% trifurca:el and 3.0% quac¢¥.rifurcated.

5. Patterns of distribution of the anterior interventricular branches mere Type I in 3. 7%, Type I in 31. 3% and Type I in 65.0% of cases.

6. Patterns of distribution of the circumflex branches were Type I in 1.5%, Type j in 53.7%, Type I in 35.8%, Type 1F in X3.0% and Type V in 3.0% of cases.

7. Patterns of distribution of the right coronary artery were Tyre I in 0%, Type I in r.7% Type I in 15.7%, Tyre N in 62.7% and Type V in 11.9% of cases.

8. Patterns of distribution of the right and left coronary artery in the diaphragmatic surface of the heart were Type I in 57.5%, Tyre I - I in 25.4%, Type I in 12.7% and Type I in 4. 5% of cases.

9. On the distribution of the branches of the right coronary artery on the ventricle, two branches was 30.6%, three branches 32.8%, four branches 29.1% of the ramus ventriculi dextri anterior. One branch in 89.6% and two branches in 6.0% of cases were seen on the ramus marginis acuti. One branch in 44.5% and two branches in 14. 9% and three branches in only 2. 2% of cases were seen in tie ramus ventriculi dextri posterior. One branch in 94.0% of cases and ro branch was seen in 6. 0% of cases in examination of the posterior interventricular branch. One branch was in 2G. t %, two branches in 20. 9%, three branches in 12. 7%, four branches in 3. 0% and five brarcl es in 0. 7% of cases on examination of the_ ramus ventriculi sinistri postericr.

10. On the distribution of the branches of the right coronary artery of the ventricle of the heart, from one; to three branches was found on the rami anteriores, of which one branch was 09.4% of cases. From one branch to two branches was found on the ramus lateralis and ore branch was 45.5% of cases. One branch in 23.9% of cases and two branches 6. 7% of cases were found on the atrii dextri anterior and in 69. 4% of cases it was not seen. One branch in 17. 9% of cases and two branches of 3. 0% were found on the ramus atrii sinistri posterior, but no branch was seen in 79.1% of cases.

11. On the distributions of the branches of the left coronary artery of the ventricles, in 100% of cases only one branch was found on the anterior interventricular branch. One Lrznch in 3. 7% of cases was found on the posterior interventricular branch and in 96.3% of cases no ir2nch was seen. From one to four branches in 94.8% of cases were found on the ramus marginis obtusi. Ore branch in 53. 0% and two branches in 32. 1% of cases. From one to five branches in 82.8% of cases were found on the ramus ventriculi sinistri posterior. One branch in 22.4%, two branches in 26. 1% and three branches in 21.6% of cases. One branch in 43.3%, two branches in 29.9% and three branches in 1.5% of cases were found on the ramus ventriculi sinistri anterior, but in 25.4% no branch was seen.

12. On the distribution of the branches of the left coronary arteries, the branches from one to four were found on the ramus atrii sinistri anterior and ramus auricularis. Ore branch was in 62. 7% of cases. One branchi in 17.9y. and threw branches in 0.7¢¥% of cases was found on the ramus atrii sinistri posterior, but no branch was seen in 81. 3% of cases.

13. Average length of left coronary artery was 19.20mm in the male adult and 17.40 mm in the female adult. It¢¥s diameter was 4.20mm in the male adult and 3.44mm in female adult. Average diameter of right coronary artery was 3.13mm in the male and 3.28mm in the female. Average diameter of the anterior interventicular branch was 2.21mm in the male and 2.2Emm in the female. Average diameter of the circumflex branch was 2.64mm in the male and 2.42mm in the female. Average diameter of posterior interventricular branch was 1. 73mm in the male and 1.93mm in the female.

14. Regression coefficients of the length of the left coronary artery, and of the diameter of the left and right coronary artery, anterior interventricular branch, circt mf¢¥ex branch and posterior interventricular branch in infant were 0. 07, 0. 06, 0.05, 0. 03 and 0.04 respectively.

15. In general, average diameter of coronary artery in adult is 1.7-2 times larger than in infant.

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