title: Assessment of coronary bypass graft patency by electron-beam computed tomography.
abstract: Twenty-one patients undergoing coronary artery bypass grafting were prospectively evaluated by conventional selective coronary angiography and electron-beam computed tomography. Eighty bypass grafts (60 saphenous vein and 20 left or right internal mammary artery) were evaluated for patency. The sensitivity and specificity of electron-beam computed tomography were 72% and 100%, respectively; positive and negative predictive values were 100% and 92.5%, respectively. Sensitivity and specificity according to coronary region were: left anterior descending artery, 33% and 100%; diagonal artery, 67% and 100%; circumflex artery, 75% and 100%; right coronary artery, 100% and 100%. Electron-beam computed tomography is relatively accurate and a promising tool for noninvasive evaluation of graft patency after coronary artery bypass graft surgery.
authors.affiliation: Department of Cardiothoracic Surgery, Dubai Hospital, Dubai, United Arab Emirates.
authors.forename: Tarek A
authors.initials: TA
authors.lastname: Abdel Aziz
authors.forename: Pramod
authors.initials: P
authors.lastname: Kumar
authors.forename: Nooshin
authors.initials: N
authors.lastname: Bazargani
authors.forename: Eman
authors.initials: E
authors.lastname: Al-Hato
authors.forename: Najib
authors.initials: N
authors.lastname: Al Khaja
mesh_terms: D000328:Adult; D000368:Aged; D017023:Coronary Angiography; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000601:surgery*; D005260:Female; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D014654:Vascular Patency