Mid-Term Results of Off-Pump Coronary Artery Bypass Grafting Assessed by Multi-Slice Computed Tomography

(Department of Cardiovascular Surgery, Chiba Tokushuukai Hospital, Funabashi, Japan and Department of Cardiovascular Surgery, Tohoku University School of Medicine*, Sendai, Japan)

Seijiro Yoshida Yoshio Nitta Katsuhiko Oda*
Off-pump coronary artery bypass (OPCAB) has recently increased in popularity, but the long-term results are still unknown. We evaluated the mid-term results of OPCAB surgery using multi-slice computed tomography (MSCT), which is a non-invasive postoperative evaluation method. Thirty-one consecutive patients who underwent OPCAB surgery at least 2 years prior to the study were selected. The age was 50 to 79 years (66.9±6.5) and the ratio of men to women was 26: 5. Coronary angiography was performed in all patients at 2 weeks postoperatively. The follow-up was complete, and mean follow-up was 30.9 months. There were no hospital deaths and 1 non-cardiac late death. The graft patency rate in coronary angiography was left internal thoracic artery (LITA) 30/30 (100%), right internal thoracic artery (RITA) 2/2(100%), radial artery (RA) 14/15(93%), saphenous vein graft (SVG) 15/17(88%). No graft became occluded on MSCT study and all patients have been angina-free during the follow-up period. We suggest that OPCAB is feasible in most patients with good patency and low mortality. MSCT is an effective follow up method for the morphological findings and non-invasive quantitative evaluation of the bypass grafts.
@Jpn. J. Cardiovasc. Surg. 33: 227-230 (2004)