CLINICAL VALIDATION OF A CORONARY SURGERY TECHNIQUE THAT MINIMIZES AORTIC MANIPULATION

Background. To minimize aortic manipulation and maximize use of arterial conduits are aims of modern coronary surgery. Methods. From March 2012 to October 2016, 890 consecutive patients with multivessel coronary disease underwent isolated coronary operations using both internal thoracic arteries (ITAs). In 205 (23%; mean age, 67.6 +/- 9.2 years), the right ITA was proximally transected and used as a free graft, while its in situ stump was elongated with a saphenous vein graft. The new arteriovenous I conduit was directed to the inferolateral cardiac wall. Operative data and early outcomes of these patients (I group) were compared with the remaining 685 patients (control [C] group). Early and late outcomes were also compared in 184 pairs identified with propensity score matching. Results. Between the I and C groups there was no significant difference in expected operative risk (European System for Cardiac Operative Risk Evaluation II, p = 0.28), although diseased ascending aorta (p < 0.0001) and critical preoperative state (p = 0.027) were more frequent in the I group. Despite a higher number of coronary anastomoses (mean, 4 +/- 0.9 vs 3.7 +/- 1, p < 0.0001), cardiopulmonary bypass time was shorter in the I group both in overall (86.7 +/- 23.7 vs 105.7 +/- 34.2 minutes, p < 0.0001) and matched series (86.8 +/- 24.1 vs 108.8 +/- 31.9 minutes, p < 0.0001). In-hospital mortality (1% vs 1.9%, p = 0.54) and the rates of postoperative complications were similar. During the follow-up period, no intergroup difference was found in matched patients in the nonparametric estimates of freedom from all-cause death (p = 0.39) and major adverse cardiac and cerebrovascular events (p = 0.44). Conclusions. Surgery using this arteriovenous I conduit is safe, minimizes aortic manipulation, shortens cardiopulmonary bypass time, and aids complete revascularization. (C) 2019 by The Society of Thoracic Surgeons