title: [Diagnostic study on the coronary artery bypass grafts lesions using 64 multi-slice computed tomography angiography].
abstract: OBJECTIVE
  To evaluate the diagnostic accuracy in the assessment of coronary artery bypass grafts using 64 multi-slice computed tomography angiography (64-MSCTA) technology.
  
  
  METHODS
  There were 228 patients post coronary artery bypass grafting (CABG) underwent 64-MSCTA from July 2005 to April 2007. Thirty-one patients with 82 bypass grafts performed coronary angiography (CAG) because of angina or grafts lesion showed by 64-MSCTA.
  
  
  RESULTS
  All bypass grafts could be visualized by 64-MSCTA. Thirteen bypass graft occlusions and fourteen significant stenosis were detected by 64-MSCTA and confirmed by CAG. One venous grafts distal anastomosis was missed and another one was miss diagnosed as stenosis. One false negative and one false positive CT-finding resulted in a sensitivity of 93.3%, a specificity of 98.1%, a positive predictive value of 93.3%, a negative predictive value of 98.1% and an accuracy of 97.1% for grafts stenosis. As to the grafts lesion, the sensitivity, specificity, positive predictive value, negative predictive value and accuracy for grafts occlusion were 96.4%, 98.1%, 96.4%, 98.1% and 97.6%, respectively.
  
  
  CONCLUSIONS
  64-MSCTA demonstrates high diagnostic accuracy in the assessment of graft patency and suitable for the follow-up of patients post CABG.
authors.affiliation: Department of Cardiovascular Surgery, General Hospital of People's Liberation Army, Institute of Cardiac Surgery of People's Liberation Army, Beijing 100853, China.
authors.forename: Zhi-yong
authors.initials: ZY
authors.lastname: Liu
authors.forename: Chang-qing
authors.initials: CQ
authors.lastname: Gao
authors.forename: Bo-jun
authors.initials: BJ
authors.lastname: Li
authors.forename: Yang
authors.initials: Y
authors.lastname: Wu
authors.forename: Cang-song
authors.initials: CS
authors.lastname: Xiao
authors.forename: Wei-hua
authors.initials: WH
authors.lastname: Ye
authors.forename: Chong-lei
authors.initials: CL
authors.lastname: Ren
authors.forename: Guo-peng
authors.initials: GP
authors.lastname: Liu
mesh_terms: D000368:Aged; D017023:Coronary Angiography / Q000379:methods*; D001026:Coronary Artery Bypass; D005260:Female; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D012680:Sensitivity and Specificity; D036542:Tomography, Spiral Computed