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目的:探讨64层螺旋CT冠状动脉(冠脉)成像(64-slice CTcoronary angiography,64SCTCA)对心肌桥(MB)的诊断及其临床价值。方法:932例患者均行64SCTCA扫描,所有数据传至工作站进行重建和后处理,观察有无MB,测量MB的长度、厚度、壁冠脉(MC)狭窄程度等。对64SCTCA发现MB的病例均行冠脉造影(CAG)并与64SCTCA的结果进行对比。结果:932例患者经64SCTCA检出MB 356例,MB检出率为38.1%;而64SCTCA检出的356例MB病例中经CAG仅检出MB 89例,MB检出率10.2%;两者比较差异有统计学意义(P<0.05)。64SCTCA发现MB的平均长度及厚度分别为(9.4±5.6)mm、(5.9±4.3)mm,MC狭窄程度为(39±23)%;CAG与64SCTCA对MB的狭窄程度与长度比较,差异亦有统计学意义(P<0.05)。结论:64SCTCA对MB和MC清晰显示,有着特殊的临床价值。
Objective: To investigate the value of 64-slice CT coronary angiography (64SCTCA) in the diagnosis of myocardial bridge (MB) and its clinical value. Methods: All 932 patients underwent 64SCTCA scan. All the data were sent to the workstation for reconstruction and postprocessing. MB was observed and the length and thickness of MB, stenosis of wall coronary artery (MC) were measured. Coronary angiography (CAG) was performed on 64 SCTCA-detected MB cases and compared to 64 SCTCA results. Results: Of the 932 patients, 356 cases were detected by 64SCTCA, the detection rate of MB was 38.1%. Among 356 cases detected by 64SCTCA, 89 cases were detected by CAG and the detection rate of MB was 10.2% The difference was statistically significant (P <0.05). The average length and thickness of MB were (9.4 ± 5.6) mm and (5.9 ± 4.3) mm, respectively, and the degree of stenosis was (39 ± 23)% in 64SCTCA. There was also a significant difference in the stenosis and length of MB between CAG and 64SCTCA Statistical significance (P <0.05). Conclusion: 64SCTCA clearly shows MB and MC and has special clinical value.