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Sequential grafting may be an effective way to maximize the benefits of the left internal mammary artery (LIMA) conduit. Despite increasing clinical application, the strategy of sequential LIMA grafting has not been proven its superiority. This single-center retrospective study aimed to evaluate the in-hospital and mid-term outcomes of sequential grafting of in situ skeletonized LIMA to the left coronary system.According to the use of sequential or separate LIMA grafting, 1505 eligible patients were assigned to a sequential group (n = 230) and a control group (n = 1275). According to sequential LIMA graft configurations, patients with sequential LIMA grafting were divided into a DOM subgroup (n = 113) and a DLAD subgroup (n = 117). The clinical outcomes and LIMA graft patency were investigated and compared.Sequential LIMA grafting compared with separate LIMA grafting was not an independent predictor either of in-hospital adverse events or follow-up survival free from repeat revascularization during the follow-up period of 32.4 ± 8.5 months. Sequential LIMA grafting had similar LIMA graft patency with separate LIMA grafting (99.5% of 1st sequential sites and 97.7% of 2nd sites versus 98.2% of LIMA-LAD grafts) at 32.3 ± 8.5 months after coronary artery bypass grafting (CABG) surgery. Additionally, the two subgroups received similar mid-term clinical outcomes and graft patency of LIMA segments.Sequential grafting of in situ skeletonized LIMA to the left coronary system resulted in excellent clinical outcomes and graft patency. The two sequential LIMA graft configurations received similar clinical outcomes and graft patency.

Sequential Grafting of in Situ Skeletonized Left Internal Mammary Artery to the Left Coronary System