关键词: 左冠状动脉分叉夹角, 　左冠状动脉主干长度, 　冠状动脉粥样斑块, 　体层摄影, X线计算机, 　维吾尔

Abstract:

Objective　To analyzed the relationship between the bifurcation angle and the length of the main trunk and the atherosclerosis of the left Coronary artery in Uighur and Han by MSCT.　Methods   Coronary artery CTA imaging data of six hospitals from 2013.6 to 2014.12 was retrospectively analyzed. Patients were classified asⅠ~Ⅳ types according to the degree of luminal stenosis of at the left coronary bifurcation region. Comparison the different types of the bifurcation angle, and the relationship between the bifurcation angle and the length of the main trunk of the left Coronary artery was performed.　Results　The study enrolled 1276 cases, in which 916 cases were of Han ethnicity, and 360 cases of Uighur ethinicity. The bifurcation angle of Han was (84±38.8)º , with a range of (29º~158º); the length of the main trunk was (9.2±5.3) mm, with a range (1.6~28.6 mm); In Uighur the bifurcation angle was (85±34)º, with a range (24º~155º); the length of main trunk length was (9.6±36.6) mm, with a range (2.4~18.3 mm). There was significant difference amongⅠand Ⅱ, Ⅲ and Ⅳ types and no significant difference among Ⅱ, Ⅲ or Ⅳ types in either Han or Uighur ethnicity. There was moderate correlation between the bifurcation angle and the length of the main trunk of the left coronary artery (Han R= 0.307; Uighur R=0.421).　Conclusion　A larger left coronary bifurcation angle and a greater length of the left main trunk are more likely to cause coronary artery atherosclerosis in the bifurcation region, but there is no significant correlation with the degree of luminal stenosis. The left coronary bifurcation angle is moderately related to the length of the main trunk of the left coronary artery, and the Uighur is slightly higher than Han.

Key words: Left coronary bifurcation angle;　Main trunk length;　Coronary atherosclerotic plaque; , Tomography, X-ray Computed;　Uighur