Long-term outcomes of coronary artery bypass grafting with the combination of free right internal mammary artery and modified proximal anastomosis: a retrospective study

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ID: 317534
2026
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Ranked #87 of 90 articles by views in Interdisciplinary CardioVascular and Thoracic Surgery

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Abstract
Abstract OBJECTIVES When a right internal mammary artery is employed as a free graft for aorta–coronary bypass, the small diameter of it may pose technical challenges at the proximal anastomosis. To address this, we developed a dome-shaped configuration of the proximal right internal mammary artery—termed “Pouch technique”—prior to anastomosis to the ascending aorta, aiming to reduce the risk of anastomotic stenosis. This study evaluates the long-term outcomes of coronary artery bypass grafting with the combination of free right internal mammary artery graft and this technique. METHODS Of 834 patients who underwent coronary artery bypass grafting at our institution between 2014 and 2024, 161 received a free right internal mammary artery graft. Among these, 145 patients were included in the analysis. All included patients underwent proximal anastomosis using Pouch technique. Graft patency was primarily assessed by coronary computed tomography angiography at 1, 5, and 10 years postoperatively. RESULTS During the follow-up period, six deaths were recorded including the two early postoperative deaths. Major adverse cardiac and cerebrovascular events occurred in 11 patients. Graft-related events were observed in seven patients. At 10-year follow-up, overall survival, and freedom from major adverse cardiac and cerebrovascular events were 93% and 82%, respectively. Cumulative incidence of graft events is 12%. CONCLUSIONS The combination of free right internal mammary artery graft and Pouch technique demonstrated favourable long-term outcomes with a low incidence of proximal anastomotic complications.
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Authors Shota Yasuda, Tomoki Cho, Shotaro Kaneko, Makoto Ikematsu, Tomoyuki Minami, Keiji Uchida, Aya Saito
Journal Interdisciplinary CardioVascular and Thoracic Surgery
Year 2026
DOI
10.1093/icvts/ivag169
URL
https://doi.org/10.1093/icvts/ivag169
Keywords Keywords not found

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