64层螺旋CT动态电影诊断心肌桥与冠状动脉造影的对比研究

Myocardial Bridge:Comparison of 64 slices spiral CT cine technique and coronary angiography

目的:采用多排螺旋CT动态电影技术观测心肌桥及其下的壁冠状动脉在心动周期不同时相的变化,比较壁冠状动脉受压后狭窄率的变化与冠状动脉造影测值的差异,探索心肌桥的形态、位置、厚度与壁冠状动脉狭窄率的相关指标及其相对应的心功能变化,进一步评估心肌桥引起心脏突发事件的风险。材料与方法:回顾性分析2008.7-2011.12月我院8942例64层螺旋CT冠状动脉CTA检查者中发现心肌桥病例630例,在行冠状动脉CTA前后一月内行冠状动脉造影者70例对照,采用多排螺旋CT动态电影技术结合多平面重组技术、容积再现技术、最大密度投影技术观测心肌桥,比较动态电影技术与冠状动脉造影技术测值的差异;结合Philips Brilliance心功能分析软件计算心功能的变化。结果:64层螺旋CT动态电影技术诊断心肌侨及壁冠状动脉与冠状动脉造影具有高度一致性,且动态电影技术检出率明显高于冠状动脉造影(p<0.05);卡方检验显示差别有统计学意义(P=0.00),心肌桥的存在对射血分数及左室容积并无明显影响(p>0.05)。结论:CT动态电影技术为临床估测心肌桥的风险提供了可靠的影像学方法:

Purpose:To investigate the displaying way and characteristcs of myocardial bridges(MB) with 64slice spiral CT coronary angiography cine technique,comparing with Coronary Angiography,discovering the Cardiac function change with degree of the narrow coronary.To evaluate the risk of the myocardial bridges.Materials and Methods;Collecting imaging data of 630 patients from 8942 cases from July2008 to December 201 1 by 64-slicespiral CT,70cases underwent coronary angiography in a month,all data were transferred to the work station CAG,(Philips Brilliance CCA),and then multi-planar reconstruction(MPR ),volume rendering(VR ),maxinluln intensity projection(MIP ) and cuned-planar reconstruction (CPR) were performed and analysedby CT cinemode.Results;There was no statistical significance between CAG and 64 slice spiral CT cine mode Cine mode in showing MB(x^2 test,P =0.321 ),MB have little significance effction on the EF and SV(p <0.05).Conclusion;CT cine mode.Provides a new technique for estimate the risk of Myocardial bridging