双源CT血管造影对心肌桥的影像学特点分析

Analysis of Imaging Features of Dual-source CT Angiography for Myocardial bridge

目的探讨双源CT血管造影下心肌桥的影像学特点。方法整群选取2014年1月—2016年1月该院收治的157例冠状动脉心肌桥患者为研究对象,根据心肌包绕壁冠状动脉情况分为A组(不完全型,55例)、B组(浅表型52例)和C组(纵深型,50例),比较3组心肌桥长度、管腔狭窄变化情况及包绕程度与心肌桥厚度间的关系。结果 C组壁冠状动脉长度(17.3±6.7)mm,壁冠状动脉横向狭窄率22.6%,纵向狭窄率28.2%,均明显高于A、B组,差异有统计学意义(P<0.05)。结论双源CT能够为心肌桥临床诊断提供有价值的信息,即心肌桥厚度与壁冠状动脉长度间存在相关性,不同包绕程度心肌桥的壁冠状动脉在横向、纵向上的管腔狭窄度也有所不同。

Objective To study the imaging features of dual-source CT angiography for myocardial bridge. Methods 157 cases of patients with coronary myocardial bridging admitted and treated in our hospital from January 2014 to January 2016 were selected as the research objects and divided into the group A（55 cases, incomplete type）, group B（52 cases, superficial type） and group C（50 cases, depth）, and the myocardial bridge length, canal stenosis change situation and correlation between the wrapped degree and myocardial bridge thickness were compared between the three groups. Results The mural coronary artery length, mural coronary artery transverse stenosis rate and longitudinal stenosis rate in the group C were respectively（17.3±6.7）mm, 22.6% and 28.2%, which were obviously higher than those in the group A and group B, The difference was statistically significant（P〈0.05）. Conclusion The dual-source CT can provide valuable information for the diagnosis of myocardial bridge, namely there is a correlation between the myocardial bridge thickness and mural coronary artery length, and the transverse and longitudinal stenosis rates of mural coronary artery of myocardial bridge vary from different wrapped degrees.