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Asian Cardiovasc Thorac Ann 2008;16:444-449
© 2008 Asia Publishing EXchange Ltd

ORIGINAL CONTRIBUTIONS

Can 64-Row Computed Tomography Replace Angiography After Coronary Bypass?

Hirosato Doi, MD, Ryuji Koshima, MD, Masato Suzuki, MD, Ken Takahashi, MD, Hiroichi Yokoyama, PhD1, Naoya Yoshida, BA1

Department of Cardiovascular Surgery
1 Department of Diagnostic Radiology, Cardiovascular Center, Hokkaido Ohno Hospital, Hokkaido, Japan

For reprint information contact: Ryuji Koshima, MD Tel: 81 11 665 0020 Fax: 81 11 665 0242 Email: koushima{at}cvc-ohno.or.jp, Cardiovascular Center, Hokkaido Ohno Hospital, 4-1-1-30 Nishino, Nishiku, Sapporo, Hokkaido 063-0034, Japan.

Multi-detector (64-row) computed tomography has become an alternative to coronary angiography to diagnose graft occlusion and stenosis after coronary artery bypass. We compared the power of evaluation of multi-detector computed tomography with that of conventional coronary angiography in 60 patients who underwent coronary artery bypass with 135 grafts and 210 graft anastomoses. The diagnostic power of multi-detector computed tomography for graft occlusion was: 100% (2/2) sensitivity, 98.5% (131/133) specificity, 50% (2/4) positive predictive value, and 100% (133/133) negative predictive value; there were no significant differences in rates of occlusion among the different types of graft. The diagnostic power of multi-detector computed tomography for stenosis of the graft anastomosis was: 100% (2/2) sensitivity, 95.1% (194/204) specificity, 16.6% (2/12) positive predictive value, and 100% (194/194) negative predictive value, with no significant differences among grafts. Multi-detector computed tomography permits evaluation of bypass grafts and is much less invasive for the patients.






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