title: Multislice computed tomography accurately detects stenosis in coronary artery bypass conduits.
abstract: The aim of this study was to evaluate the accuracy of multislice computed tomography in detecting graft stenosis or occlusion after coronary artery bypass grafting, using coronary angiography as the standard. From January 2005 through May 2006, 25 patients (19 men and 6 women; mean age, 54 +/- 11.3 years) underwent diagnostic investigation of their bypass grafts by multislice computed tomography within 1 month of coronary angiography. The mean time elapsed after coronary artery bypass grafting was 6.2 years. In these 25 patients, we examined 65 bypass conduits (24 arterial and 41 venous) and 171 graft segments (the shaft, proximal anastomosis, and distal anastomosis). Compared with coronary angiography, the segment-based sensitivity, specificity, and positive and negative predictive values of multislice computed tomography in the evaluation of stenosis were 89%, 100%, 100%, and 99%, respectively. The patency rate for multislice computed tomography was 85% (55/65: 3 arterial and 7 venous grafts were occluded), with 100% sensitivity and specificity. From these data, we conclude that multislice computed tomography can accurately evaluate the patency and stenosis of bypass grafts during outpatient follow-up.
authors.affiliation: Department of Radiology, Florence Nightingale Hospital, Sisli, Istanbul 80220, Turkey.
authors.forename: Cihan
authors.initials: C
authors.lastname: Duran
authors.forename: Ertan
authors.initials: E
authors.lastname: Sagbas
authors.forename: Baris
authors.initials: B
authors.lastname: Caynak
authors.forename: Ilhan
authors.initials: I
authors.lastname: Sanisoglu
authors.forename: Belhhan
authors.initials: B
authors.lastname: Akpinar
authors.forename: Murat
authors.initials: M
authors.lastname: Gulbaran
mesh_terms: D000328:Adult; D017023:Coronary Angiography; D001026:Coronary Artery Bypass; D005260:Female; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014654:Vascular Patency