心肌桥和壁冠状动脉64层螺旋CT成像与冠状动脉造影比较

目的探讨64层CT冠状动脉成像对心肌桥的诊断及其临床价值。方法1422例患者均行64层CT扫描,所有数据传至工作站进行重建和后处理,观察有无心肌桥,测量心肌桥的长度、厚度、壁冠状动脉狭窄程度等。所有肌桥病例均行冠状动脉造影检查并与CT结果对比。结果共发现104例119段心肌桥,平均长度及厚度分别为5.0±2.7mm、2.0±1.6mm,壁冠状动脉狭窄程度为31%±17%。104例肌桥患者数学减影血管造影技术发现42例44段肌桥,其长度为5.1±3.6mm、狭窄程度为70.2%±28.4%,与CT结果差异存在显著性(P<0.05)。结论64层CT可清晰显示心肌桥和壁冠状动脉,对其诊断有着特殊的临床价值。

The Contrast Study of 64 CT Angiography and Coronay Angiography in Diagnosticating Myocardial Bridge and Mural Coronary Artery

Aim to investigate the diagnostic value of 64 CT angiography in determining myocardial bridge(MB) and mural coronary artery(MCA).Methods 1 422 patients were underwent 64 CT angiography.The CTA data were post-processed and reconstructed in the work-station.All the cases with MB were submitted to CAG studies.The length,thickness of MB and the stenoses of MCA were recorded for study.The results of CT and DSA were compared and analyzed finally.Results 104 cases with 119 MB segments were found in the study,with mean length 5.0±2.7 mm,mean thickness 2.0 1.6 mm.The mean stenosis rate of MC is 31%±17%.42 cases with 44 MB segments were found by DSA study.The length and thickness were statistically deferent from CT results.Conclusion CTA can clearly characterize MB and MCA,and has important clinical values.