Effect of conventional coronary CT angiography conventional bolus injection of contrast agent on the left main coronary artery and the bifurcation
10.3760/cma.j.cn115455-20210507-00600
- VernacularTitle:冠状动脉CT血管造影常规方案团注造影剂对冠状动脉左主干分叉区的影响
- Author:
Yanfeng XU
1
;
Shujing YU
;
Yapeng DONG
;
Tianjiao GUO
;
Yan WANG
Author Information
1. 河北省沧州市中心医院CT诊断科 061001
- Keywords:
Coronary angiography;
Contrast media;
Contrast media bolus;
Left main artery
- From:
Chinese Journal of Postgraduates of Medicine
2021;44(11):1020-1025
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the effect of conventional coronary CT angiography (CCTA) bolus injection of contrast agent on the diameter and angle of the left main coronary artery (LMA) bifurcation area, and to provide a basis for the application of CCTA to accurately measure the coronary artery.Methods:In Cangzhou Central Hospital of Hebei Province from January to December 2020, the clinical data of 54 patients with suspected coronary heart disease who underwent coronary artery calcification score (CACS) and CCTA with conventional bolus injection of contrast agent were retrospectively analyzed. Two physicians measured middle lumen diameter of LMA (d1), proximal lumen diameter of left anterior descending (LAD) (d2), proximal lumen diameter of left circumflex (LCX) (d3) and bifurcation angle between LAD and LCX (∠1). The consistency of 2 physicians was compared, and the results of CACS and CCTA were compared.Results:The consistency analysis result showed that only d3 measured by CCTA had a moderate consistency (intra-group correlation coefficient = 0.717), and the remaining indexes were in good agreement (intra-group correlation coefficient >0.75). There were no statistical differences in indexes measured results between CACS and CCTA ( P>0.05). According to the degree of left coronary artery stenosis, 54 patients were divided into 2 groups: LMA and branches normal or stenosis degree < 50% group (25 cases) and LMA and branches 1 or more branches stenosis degree≥50% group (29 cases). There were no statistical differences in indexes measured results between CACS and CCTA in patients with different disease severity ( P>0.05). Conclusions:In the CCTA examination, the conventional bolus injection of contrast agent does not affect the diameter and angle of the lumen of the LMA bifurcation area of the coronary artery.
