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Published online before print August 2, 2002, 10.1148/radiol.2243010691
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(Radiology 2002;224:913-918.)
© RSNA, 2002

Technical Developments

Coronary Artery Bypass Graft Flow: Qualitative Evaluation with Cine Single–Detector Row CT and Comparison with Findings at Angiography1

Richard Tello, MD, MSME, MPH, George G. Hartnell, MD, FRCR, Philip Costello, MD and Christian P. Ecker, MD

1 From the Department of Diagnostic Radiology, Beth Israel-Deaconess Hospital, Harvard Medical School, Boston, Mass (R.T., G.G.H., P.C., C.P.E.); and Department of Radiology, Atrium-2, Boston University School of Medicine, 88 Newton St, Boston, MA 02218 (R.T.). From the 1992 RSNA scientific assembly. Received March 28, 2001; revision requested May 21; final revision received March 25, 2002; accepted March 28. Supported by Public Health Service grant RR 05591. Address correspondence to R.T. (e-mail: tello@alum.mit.edu).

A four-point ordinal-scale qualitative flow index was used for assessment of patency of 75 coronary artery bypass grafts in 26 patients examined with spiral computed tomography (CT). CT findings were compared with selective graft angiographic findings. Of 54 open grafts, 52 were patent at initial selective graft angiography and 50 were patent at spiral CT; accuracy rates were 97% (73 of 75) and 95% (71 of 75), respectively. Spiral CT flow index agreed with angiographically determined flow in 85% (95% CI: 0.77, 0.93) of grafts. The {kappa} statistic demonstrated very good to excellent intermodality (0.75) and interobserver (0.89) agreement. Spiral CT may be a feasible means of assessing quality of flow in bypass grafts.

Supplemental material: radiology.rsnajnls.org/cgi/content/full/2243010691/DC1

© RSNA, 2002

Index terms: Angiography, technology, 54.1242 • Computed tomography (CT), helical, 54.12115 • Coronary vessels, bypass graft • Coronary vessels, CT, 54.12115, 54.12117 • Grafts




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