前瞻性心电门控双源CT冠状动脉成像对CABG术后桥血管通畅性的评估  

Prospective ECG-gated dual source CT coronary angiography for the evaluation of coronary artery bypass graft patency

作　　者：武新英[1] 殷信道[1] 许权[1] 徐辉[1] 顾建平[1] 

机构地区：[1]南京医科大学附属南京医院(南京市第一医院)放射影像科,南京210006

出　　处：《临床心血管病杂志》2013年第12期911-914,共4页Journal of Clinical Cardiology

基　　金：南京市卫生青年人才(第三层次)培养计划资助

摘　　要：目的:评价前瞻性心电门控双源CT冠状动脉成像(CTCA)对冠状动脉搭桥术(CABG)后桥血管通畅性的应用价值及放射剂量水平。方法:34例患者于CABG后行前瞻性心电门控双源CTCA,分析其成像结果及放射剂量。结果:34例患者共检出桥血管77支,其中内乳动脉桥21支,大隐静脉桥56支;动脉桥血管中通畅者18支(85.7%),狭窄和闭塞血管3支(14.3%);静脉桥通畅45支(80.3%),血管狭窄和闭塞血管11支。平均有效放射剂量为(5.95±0.36)mSv。结论:前瞻性心电门控双源CTCA可以在较低放射剂量水平对CABG后桥血管通畅状况做出评价,对闭塞血管通过三维重建的多种方法可以准确诊断。Objective： Evaluation the application value of prospective electrocardiography （ECG） gated dual source computed tomography coronary angiography （CTCA） for the measurement of graft vessel patency after coronary artery bypass surgery （CABG）. Method： Thirty-four patients had recieved prospective electrocardiography （ECG） gated dual source computed tomography coronary angiography （CTCA） measurement for the evaluation of graft patency after CABG surgery. Graft vessel patency was graded and their radiation doses were calculated. Result：Total 77 grafts were observed in all 34 patients, 21 grafts were left internal mammary artery （LIMA） grafts and 56 were saphenous vein （SV） grafts. Of 21 internal mammary artery grafts, there were 18 patent grafts （85.7%）, 3 restenosis or occlusive grafts （14.3%）. Of 56 saphenous vein grafts, 45 grafts （80.4%） were patent, 11 grafts （19.6%） were restenosis or occluded. Effective radiation dose was （5.95±0.36）mSv. Conclusion：The patency of CABG can be effectively assessed by noninvasive prospective ECG-gated second generation dual-source CTCA at a low radiation dose level.

关 键 词：双源CT 冠状动脉旁路搭桥术 放射剂量 

分 类 号：R541.4[医药卫生—心血管疾病]