双源CT心肌桥的检出率及其价值

Prevalence of Myocardial Bridge on Dual-source CT and its Clinical Significance

目的评价双源CT(DSCT)对心肌桥(MB)的检出率及其临床意义。资料与方法360例可疑冠状动脉疾病患者行DSCT冠状动脉造影,依据美国心脏病协会的冠状动脉分段原则对MB进行定位、分析相关病理学改变、统计MB的检出率,并与常规冠状动脉血管造影(CAG)进行对照。结果360例中104例发现MB,共检出MB151支,检出率29%(104/360);其中74支位于7段,35支位于8段,9支位于9段,1支位于2段,1支位于15段,5支位于16段,4支位于13段,2支位于10段。MB平均长度为(2.16±0.79)cm,平均深度为(0.32±0.11)cm。48例患者在MB前存在动脉粥样硬化性改变。在DSCT检出的21支MB患者中,CAG仅检出4支MB。结论DSCT对MB的检出率明显高于CAG,同时还能对MB的深度及粥样硬化情况进行定量评价。

Objective To discuss prevalence of myocardial bridge on dual-source CT and its clinical significance. Materials and Methods 360 patients with suspected coronary artery disease received dual - source CT （DSCT） coronary angiography. Coronary arteries were segmented according to the guideline of the American Heart Association （AHA）. The presence, locations, and associated pathological lesions of MB were recorded. Results 104 patients had MB in overall 360 patients on DSCT, giving the prevalence of 29% （104/360）. 151 MB were detected with the mean length of 2.16 ± 0.79 cm and mean depth of 0.32 ±0.11 cm. Of 151 MB, 74 in segment 7, 35 in segment 8, 9 in segment 9, 1 in segment 2, 1 in segment 15, 5 in segment 16, 4 in segment 13, and 2 in segment 10. 48 patients with MB had atherosclerotic plaque. 16 patients had 21 MBs on DSCT, while 4 MBs were detected on CAG. Conclusion More MBs can be detected using DSCT compared with CAG, and DSCT can evaluate the length and depth of MB.