双源CT冠状动脉成像对心肌桥-壁冠状动脉的诊断价值

摘要

Objective To assess the evaluation of dual-source CT coronary angiography (CTA) in diagnosing myocardial bridges. Methods Dual-source CT coronary artery imaging was performed in 325 patients suspected of coronary artery disease (CAD) for evaluation of the efficacy of dual-source CT in MCA-MB diagnosis. Results CTA detected 63 cases and a total of 325 myocardial bridges, the rate was 19.3% (63/325). Forty-five were incomplete MB and 18 were complete MB. Fifty-three located in the middle left anterior descending artery, 6 (10%) MBs were in the CX;4 MBs was in the right coronary artery. The mean length and thickness of myocaidial bridge were (17.6±8.1)mm and (2.7±1.2)mm, respectively. The incidence of atherosclerosis of MCA-MB adjacent vessels was 43%. Conclusion Dual-source CT coronary artery imaging can display exactly anatomy relationship of mural coronary artery and my-ocardial structure with high detection rate, and can be taken as an non-invasion and accurate diagnosis method for myocardial bridge.%目的：探讨双源CT（DSCT）对心肌桥（MB）诊断的临床应用价值。方法325例疑似冠心病患者行DSCT冠状动脉成像，统计MB的检出率，分析MB影像学特点。结果325例患者中检出MB 63例，均为单支病变，检出率19.3％，表浅型45例，纵深型18例；其中发生于左前降支53处（84％），左回旋支6处（10％），右冠状动脉4处（6％），心肌桥平均厚度为（2.7±1.2）mm， MB平均长度为（17.6±8.1）mm。 MB邻近血管粥样硬化率为43％。结论双源CT冠状动脉成像能清晰显示壁冠状动脉与心肌桥的解剖关系，是一种无创、准确诊断MCA-MB的方法。