Evaluation of coronary artery bypass graft patency using three-dimensional reconstruction and flow study of electron beam tomography
10.3760/j.issn:0366-6999.2001.05.006
- VernacularTitle:电-子束CT三维重建及血流方法评价冠状动脉搭桥术
- Author:
Bin LU
1
;
Ruping DM
;
Baolian JING
;
Hua BAI
;
Sha HE
;
Nan ZHUANG
;
Qingyu WU
;
Xiaodong ZHU
Author Information
1. Chinese Academy of Medical Sciences
- From:
Chinese Medical Journal
2001;114(5):466-472
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish and evaluate two protocols for the noninvasive visualization and assessment of coronary artery bypass graft (CABG) patency on electron beam tomography (EBT).Methods Two hundred and fourteen consecutive patients who underwent coronary artery bypass graft surgery were scanned using both EBT angiography with 3-dimensional reconstruction and EBT flow study with time-density-curve analysis.Results There were 589 CABGs evaluated in this study (10 grafts were excluded because of artifacts). Among them, 133 (98.5％) of 135 arterial grafts were patent, and 345 (77.7％) of 444 saphenous-vein grafts were patent. Within 5 years or between 5 and 10 years after operation, arterial graft patency exceeded venous graft patency (P ＜ 0.001 ). Three-dimensional EBT angiography achieved higher sensitivity, specificity and accuracy (97.7％, 94.1％ and 96.7％, respectively) than did EBT flow study (88.4％, 82.4％ and 85.2％, respectively) for evaluating occlusion or patency of CABG. The intra-graft flow of patent arterial and venous grafts were 4.9 ± 2.2 mi · min-1 · g-1 and 6.9 ± 2.8 mi · min-1 · g-1,respectively (P＜0.001).Conclusion The combination of EBT three-dimensional reconstruction and flow study can be more effective in the assessment of CABG anatomy and quantification of patent CABG blood flow.
