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Comparison of graft patency for off-pump and conventional coronary arterial bypass grafting using 64-slice multidetector spiral computed tomography angiography

^a Department of Cardiovascular Surgery, PLA General Hospital, PLA Institute of Cardiac Surgery, China
^b Department of Radiology, PLA General Hospital, Beijing, China

*Corresponding author. 28 Fuxing Rd, Haidian District, Beijing 100853, China. Tel.: +86 10 88626988; fax: +86 10 88626988.

E-mail address: gaochq301{at}yahoo.com (C. Gao).

Off-pump coronary artery bypass graft surgery (OPCAB) has been performed for many years and its use is increasing frequently, but it remains an open question whether OPCAB provides similar patency to conventional coronary artery bypass graft (CCABG) surgery with cardiopulmonary bypass. The present study assessed the graft patency in patients that had coronary arterial bypass grafting (CABG) performed on-pump and off-pump. A total of 237 patients with CABG performed by a single surgeon were retrospectively studied, in which 100 patients underwent CCABG and 137 patients underwent OPCAB; the two groups were well matched according to relative factors and no significant differences were found in both groups. Postoperatively, systematic assessment on the graft patency of all the patients was conducted with 64-slice multidetector spiral computed tomography angiography (MSCTA) at one month, 1 year, 2 years, 3 years and 4 years, respectively, to provide 641 grafts for analysis. Patency of left internal mammary artery (LIMA) was higher than that of saphenous vein (SVG) in both groups; no significant difference was seen in LIMA patency and SVG patency in both groups. Results of 64-slice MSCTA indicate that OPCAB provides similar patency to CCABG surgery with CPB.

Key Words: CABG; Graft patency; Multidetector spiral computed tomography

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eComment: Valid comparisons between off-pump and on-pump coronary artery surgery can only be based on strict study design

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