心肌桥:冠状动脉CT血管成像与传统冠状动脉造影对比研究

目的:探讨传统冠状动脉造影与64排螺旋冠状动脉CT血管成像在诊断心肌桥方面的临床价值.方法:135例患者纳入本研究并行冠状动脉CT血管成像(CT Angiography,CTA),其中50例CT检查前后2周内行传统冠状动脉造影(Conventional coronary angiography,CCA)检查.CT图像分析内容包括有无肌桥、肌桥位置、长度、深度分型、收缩期狭窄程度、邻近管壁情况.CCA图像分析内容包括有无肌桥,肌桥位置、长度、收缩期狭窄程度.描述分析2种方法的肌桥检出率,CT中肌桥的位置及邻近管壁情况,评价2种方法收缩期狭窄程度的相关性及差异性,并分析肌桥收缩期狭窄程度与深度及长度之间的相关性.结果:135例患者诊断肌桥9l例,共103个,CTA肌桥检出率为67.4%,前降支中段占60.2%,浅表型69个,纵深型34个,50例存在近侧管壁斑块,5例存在远侧管壁斑块.CTA与CCA收缩期狭窄程度间存在相关性,相关系数0.785;CTA中肌桥收缩期狭窄程度与长度问存在正相关性,相关系数0.282;CTA中肌桥收缩期狭窄程度与深度间存在正相关,相关系数0.561.2种方法的收缩期狭窄程度无明显差异性.结论:CTA能直接、清晰显示心肌桥与壁血管的形态学特征;心肌桥深度越深,范围越长,收缩期管腔狭窄越明显;与传统冠状动脉造影相比,冠状动脉CT血管成像能明显提高对心肌桥的检出率,但在对壁血管收缩期狭窄程度测量方面不及传统冠状动脉造影准确.

The morphology of myocardial bridge at coronary CT angiography in comparision to conventional coronary angiography

Objective:To evaluate the clinical significance of myocardial bridge at coronary CT angiography(CTA)comparing with conventional coronary angiography(CCA).Methods:135 patients who underwent coronary CT angiography were included in this study, while 50 of these patients underwent conventional coronary angiography within a time interval of two weeks.The depiction rate,precise location,length,depth,systolic stenosis and the situation of the nearby arteries were evaluated in CTA.The depiction rate,precise locati...