Skip Navigation LinksHome > December 2012 - Volume 60 - Issue 8 > Diagnostic Accuracy of Dual-Source 64-Slice Multidetector Co...
Journal of Investigative Medicine:
doi: 10.231/JIM.0b013e31826d901b
Original Articles

Diagnostic Accuracy of Dual-Source 64-Slice Multidetector Computed Tomography in Evaluation of Coronary Artery Bypass Grafts

Şahiner, Levent MD*; Canpolat, Uğur MD*; Yorgun, Hikmet MD; Hazrolan, Tuncay MD‡ı; Karçaaltncaba, Muşturay MD‡ı; Sunman, Hamza MD*; Kaya, Ergün Barş MD; Aytemir, Kudret MD, FESC*; Oto, Ali MD, FESC, FACC, FHRS*

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Background: The aim of this study was to compare the diagnostic accuracy of 64-slice multidetector computed tomography (MDCT) with conventional coronary angiography to detect graft patency and stenosis.

Methods: In this retrospective analysis, we included a total of 284 subjects (210 men, 73.9%; mean ± SD age, 62.6 ± 9.9) and evaluated 684 bypass grafts using a dual-source 64-slice MDCT scanner The mean ± SD time interval between coronary artery bypass grafting operation and MDCT was 30.8 ± 6.2 months. The mean ± SD interval between MDCT angiography and conventional coronary angiography was 14.2 ± 3.6 days. Significant stenosis was defined as lesions causing 50% or greater luminal narrowing. All atherosclerotic lesion components were assessed on per-segment basis.

Results: All of the 684 grafts (420 venous and 264 arterial grafts) were evaluable and included in the analysis. For the detection of 50% or greater graft stenosis, the sensitivity, specificity, positive predictive value and negative predictive value of MDCT was 98.3%, 99.3%, 98.3%, and 99.3% for venous grafts and 100%, 99.5%, 98.0%, and 100% for arterial grafts. In detection of graft patency, the sensitivity, specificity, positive predictive value, and negative predictive value of MDCT was 99.6%, 97.2%, 99.0%, and 99.0% for venous grafts and 99.5%, 97.5%, 99.5%, and 97.5% for arterial grafts. Diagnostic accuracy for the detection of graft patency was 99% (416/420) and 99.2% (262/264) for venous and arterial grafts, respectively.

Conclusion: The diagnostic accuracy of dual-source 64-slice MDCT angiography for evaluating coronary artery bypass grafts patency and stenosis was high. Dual-source 64-slice MDCT can be used for the evaluation of patients after coronary artery bypass grafting.

© 2012 American Federation for Medical Research


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