Detection of Coronary Bypass Graft patency by 256-Slice Multi-detector Computed Tomography

Main Article Content

Lertlak Chaothawee, MD
Kittipan Visudharom, MD
Sucharath Warutama, MD
Pongpan Poonsawat, MD
Pradub Sukum, MD
Sangrawee Sri-ngam
Paweena Mapinta
Busakol Ngam-muang
Pornpanus Kaewchai


OBJECTIVE. To evaluate the diagnostic accuracy of 256-slice Multidetector Computerized Tomography (256-MDCT) in detection of coronary graft patency by comparison with the gold standard invasive coronary angiography (ICA).

MATERIALS AND METHODS. From January 2009 to April 2011, a total of 29 consecutive patients who had previously had CABG surgery were referred to us for assessment of graft patency. A total of 84 coronary bypass graft conduits (38 arterial graft conduits, 46 venous graft conduits) were studied, using 256-MDCT and ICA with iodine contrast intravenous injection. All patients underwent coronary angiography to either confirm result or PCI of graft disease. The diagnostic accuracy of the 256-MDCT for coronary bypass graft evaluation was assessed by comparing it to the ICA in terms of sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV).

RESULTS. A total of 84 grafts were imaged using the 256-MDCT and all grafts were visualized. There was no statistical difference in diagnostic accuracy between MDCT and ICA regardless of the age, size or type of the bypass graft conduit (p value = 0.13). The sensitivity, specificity, positive predictive value, negative predictive value of 256-MDCT in coronary artery bypass graft assessment were 100%, 97.8% , 97.5% and 100 % respectively.

CONCLUSION. The 256-MDCT provides a high accuracy, reliability and feasibility for coronary bypass graft evaluation and the diagnostic accuracy is comparable to the gold standard ICA.


Download data is not yet available.

Article Details

How to Cite
Chaothawee L, Visudharom K, Warutama S, Poonsawat P, Sukum P, Sri-ngam S, Mapinta P, Ngam-muang B, Kaewchai P. Detection of Coronary Bypass Graft patency by 256-Slice Multi-detector Computed Tomography. BKK Med J [Internet]. 2011 Sep. 20 [cited 2023 Dec. 5];2(1):6. Available from:
Original Article


1. Garrett HE, Dennis EW, DeBakey ME. Aortocoronary bypass with saphenous vein graft. Seven-year follow-up. JAMA 1973 12;223:792-4.
2. Yusuf S, Zucker D, Peduzzi P, et al. Effect of coronary artery bypass graft surgery on survival: overview of 10-year results from randomised trials by the Coronary Artery Bypass Graft Surgery Trialists Collaboration. Lancet 1994;344:563-70.
3. Houslay ES, Lawton T, Sengupta A, et al. Non-invasive assessment of coronary artery bypass graft patency using 16-slice computed tomography angiography. Journal of cardiothoracic Surgery 2007;2:27.
4. Jones CM, Athanasiou T, Dunne N, et al. Multi-Detector Computed Tomography in Coronary Artery Bypass Graft Assessment: A Meta-Analysis. Ann Thorac Surg 2007; 83:341-8.
5. Eagle KA, Guyton RA, Davidoff R, et al. ACC/AHA 2004 guideline update for coronary artery bypasses graft surgery: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Update the 1999 Guidelines for Coronary Artery Bypass Graft Surgery). Circulation 2004;110:340-437.
6. Schroeder S, Kopp AF, Kuettner A, et al. Influence of heart rate on vessel visibility in noninvasive coronary angiography Ann Thorac Surg 2007;83:341-8.
7. Nieman K, Rensing BJ, van Geuns RJ, et al. Non-invasive coronary angiography with multislice spiral computed tomography: impact of heart rate. Heart 2002;88:470-4.
8. Chiurlia E, Menozzi M, Ratti C, et al. Follow-up of coronary artery bypass graft patency by multislice computed tomography. Am J Cardiol 2005;95:1094-7.
9. Chaothawee L, Visudharom K, Poonsawat P, et al. Accuracy of the 256 Multi-detector Computerized Tomography in Diagnosing Coronary Artery Stenosis Experience from Bangkok heart hospital. The Bangkok Medical Journal 2011;1:1-6.