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Journal of Computer Assisted Tomography:
doi: 10.1097/RCT.0b013e3182a58a8c
Cardiovascular Imaging

Follow-Up of Coronary Artery Bypass Graft Patency: Diagnostic Efficiency of High-Pitch Dual-Source 256-Slice MDCT Findings

Yuceler, Zeyneb MD,*†; Kantarci, Mecit MD, PhD,; Yuce, Ihsan MD,; Kizrak, Yesim MD,; Bayraktutan, Ummugulsum MD,; Ogul, Hayri MD,; Kiris, Adem MD,*; Celik, Omer §; Pirimoglu, Berhan MD,; Genc, Berhan MD,; Gundogdu, Fuat MD,

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Abstract

Objectives

Our aim was to evaluate the diagnostic accuracy of 256-slice, high-pitch mode multidetector computed tomography (MDCT) for coronary artery bypass graft (CABG) patency.

Methods

Eighty-eight patients underwent 256-slice MDCT angiography to evaluate their graft patency after CABG surgery using a prospectively synchronized electrocardiogram in the high-pitch spiral acquisition mode. Effective radiation doses were calculated. We investigated the diagnostic accuracy of high-pitch, low-dose, prospective, electrocardiogram-triggering, dual-source MDCT for CABG patency compared with catheter coronary angiography imaging findings.

Results

A total of 215 grafts and 645 vessel segments were analyzed. All graft segments had diagnostic image quality. The proximal and middle graft segments had significantly (P < 0.05) better mean image quality scores (1.18 ± 0.4) than the distal segments (1.31 ± 0.5). Using catheter coronary angiography as the reference standard, high-pitch MDCT had the following sensitivity, specificity, positive predictive value, and negative predictive value of per-segment analysis for detecting graft patency: 97.1%, 99.6%, 94.4%, and 99.8%, respectively.

Conclusions

In conclusion, MDCT can be used noninvasively with a lower radiation dose for the assessment of restenosis in CABG patients.

Copyright © 2014 by Lippincott Williams & Wilkins

  

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