CT imaging characteristics of incomplete and complete myocardial bridges-mural coronary artery
10.3760/cma.j.issn.0253-3758.2011.01.008
- VernacularTitle:不完全与完全心肌桥-壁冠状动脉的CT影像特征分析
- Author:
Jin GU
1
;
He-Shui SHI
;
Ping HAN
;
Yun-Feng ZHOU
;
Ai-Lan WU
;
Hong-Wei REN
;
Yong-Hua LIU
Author Information
1. 华中科技大学同济医学院附属协和医院
- Keywords:
Coronary vessels;
Tomography X-ray computed;
Coronary arteriosclerosis
- From:
Chinese Journal of Cardiology
2011;39(1):40-44
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the CT imaging characteristics of incomplete and complete myocardial bridges-mural coronary artery(MB-MCA). Methods Fifty subjects with dual source coronary CT angiography(DSCTA)evidenced MB were included. The subjects were divided into incomplete MBMCA and complete MB-MCA groups. The diameter of MCA in best systole phase and diastole phase, the MCA stenosis rate, the presence of atheromatous change proximal to the MB were evaluated. Results There were 58 MB, the average length was(2. 02 ± 1.02)cm, 23 were incomplete MB and 35 were complete MB.Thirty-two MB were in the middle segments of left anterior descending artery(55.2%);17 MB were in the distal segment of the left anterior descending artery(29. 3%);1 MB was in the proximal segment of left anterior descending artery;3 MB in diagonal branch;4 MB in obtuse marginal branch, 1 MB in distal right coronary artery. It was statistically significant difference between the incomplete MB-MCA and the complete MB-MCA of the diameter change in diastole and systole phase[(1.93 ±0. 49)mm,(1.71 ±0. 45)mm vs.(2.21 ±0.41)mm,(1.63 ±0.52)mm, P=0.008]and stenosis rate(10.38%±20.2%vs. 25.12% ±21.02%, P = 0. 01). Atherosclerotic finding was evidenced in 8 incomplete MB(34. 78%)and 15complete MB(42. 86%)at the proximal vessel of mural coronary artery(P ＞ 0. 05). Conclusion DSCTA can vividly display the incomplete and complete myocardial MB, accurately evaluate the shape change of MB-MCA in diastole and systole phase and detect the atherosclerotic change in the proximal vessel of MB.
