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双源CT对壁冠状动脉狭窄程度与心肌桥长度和厚度相关性的研究
引用本文:刘世合,柳澄,王锡明,王敏,邓凯,孙晓丽,李曼. 双源CT对壁冠状动脉狭窄程度与心肌桥长度和厚度相关性的研究[J]. 中华放射学杂志, 2009, 43(2). DOI: 10.3760/cma.j.issn.1005-1201.2009.02.014
作者姓名:刘世合  柳澄  王锡明  王敏  邓凯  孙晓丽  李曼
作者单位:山东大学医学院山东省医学影像学研究所,济南,250021
基金项目:山东省医药卫生科技发展计划 
摘    要:目的 利用双源CT(DSCT)探讨壁冠状动脉(MCA)收缩期的狭窄程度与心肌桥(MB)的长度及厚度间的相关关系.方法 应用DSCT对450例可疑冠心病(CHD)和部分体检者行冠状动脉CTA,2名CT诊断医师独立判断MB-MCA的存在,结果一致时确定为MB-MCA.测量MB长度、厚度,结果 用x±s表示.以每隔5%R-R间期为1个重建时相,观察并测量MCA在整个心动周期中管径的变化,探索管径最大和最小时的时相显示规律,计算MCA最大狭窄程度,应用Pearson相关统计分析狭窄程度与MB的长度及厚度之间的相关关系.结果 450例可疑CHD和体检者,冠状动脉CTA发现MB-MCA 163例(36.2%),192处.在选取的被心肌完全包绕或覆盖的30例MB-MCA中,MCA收缩期管径最小时出现于R-R间期30%~35%者27例(90.0%),MCA舒张期管径最大时出现于R-R间期70%~80%者27例(90.0%).统计学结果显示,MCA管腔狭窄程度与MB的厚度呈明显相关(r=0.675,P<0.01),而与MB的长度无明显相关性(r=0.096,P>0.05).结论 DSCT冠状动脉成像MCA管径最小和最大时一般分别出现于R-R间期30%~35%和70%~80%处;MCA收缩期狭窄程度与MB的厚度呈明显相关,而与MB的长度无明显相关.

关 键 词:冠状血管畸形  体层摄影术,X线计算机  冠状动脉狭窄

The correlative investigation between the percentage of the systolic stenosis of the mural coronary artery and the length and depth of the myocardial bridge with dual-source CT
LIU Shi-he,LIU Cheng,WANG Xi-ming,WANG Min,DENG Kai,SUN Xiao-li,LI Man. The correlative investigation between the percentage of the systolic stenosis of the mural coronary artery and the length and depth of the myocardial bridge with dual-source CT[J]. Chinese Journal of Radiology, 2009, 43(2). DOI: 10.3760/cma.j.issn.1005-1201.2009.02.014
Authors:LIU Shi-he  LIU Cheng  WANG Xi-ming  WANG Min  DENG Kai  SUN Xiao-li  LI Man
Abstract:Objective To investigate the correlation between the percentage of systolic stenosis of the mural coronary artery (MCA) and the length and depth of the myocardial bridge using dual-source computed tomography (DSCT). Methods Four hundred and fifty patients suspected of coronary artery disease (CHD) underwent dual-source computed tomography coronary angiography (DSCTCA). The images were analyzed by 2 radiologists independently. When consistency was obtained among the independent results, the diagnosis of MB-MCA could be confirmed. The length of MCA and depth of MB were measured. All data were reconstructed by every 5% R-R interval, the diameters of MCAs during the whole cardiac cycle were reviewed and measured, the phases were detected when the diameters of MCAs were maximal and minimal, the systolic stenosis rate of MCA was calculated,Pearson correlation analysis was used to analyze the relation between length, depth, and degree of systolic stenosis of the MCAs. Results One hundred and ninety-two sites of MB-MCA were found in 163 ( 36. 2% ) of 450 patients. Of the 192 sites, 72 were completely surrounded by myocardium. Among the 30 MCA sites chosen from these 72 sites, the minimal diameters were found at 30%--35% R-R reconstruction interval in 27 sites(90.0% ), and the maximal diameters were found at 70%--80% R-R reconstruction interval in 27 sites (90. 0% ). A significant correlation was not found between systolic stenesis and the length of the MB ( r = 0. 096, P > 0. 05 ) but was found with the depth of the MB ( r = 0. 675, P < 0. 01 ) of the MCA. Conclusion The minimal and maximal diameters of the MCA usually emerged in 30%--35% R-R reconstruction interval and 70%---80% R-R reconstruction interval on DSCTCA, respectively. The degree of systolic stenosis of MCA significantly correlates with MB depth but not length.
Keywords:Coronary vessel anomalies  Tomography,X-ray computed  Coronary stenosis
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