Abstract 15502: Clinical Outcomes in Patients Undergoing Non-cardiac Surgery Within 1 Year of Pci

Abstract

Introduction: Perioperative cardiovascular events are an important cause of morbidity and mortality associated with non-cardiac surgery (NCS), especially in patients with recent percutaneous coronary intervention (PCI) who require dual antiplatelet therapy. Objective: To illustrate the types and timing of different noncardiac surgeries occurring within 1 year of PCI, and to evaluate the risk of thrombotic and bleeding events according to perioperative antiplatelet management. Methods: All patients undergoing NCS within 1 year of PCI at a tertiary-care center between 2011 and 2018 were included. The primary outcome was major adverse cardiac events (MACE; composite of death, myocardial infarction, stent thrombosis or target vessel revascularization). The key secondary outcome was major bleeding, defined as ≥2 units of blood transfusion. All outcomes were evaluated at 30 days after NCS. Results: A total of 1092 NCS (corresponding to 747 patients) were included and classified by surgical risk (low: 50.9%, intermediate: 38.4%, high: 10.7%) and priority (elective: 88.5%, urgent/emergent: 11.5%). High-risk and urgent/emergent surgeries tended to occur earlier post-PCI compared to low-risk and elective ones ( Figure-A ). The incidence of MACE and bleeding was time-dependent, with an increased risk in surgeries occurring in the first 6 months post-PCI ( Figure-B ). Perioperative antiplatelet cessation occurred in 487 (44.6%) NCS and was more likely for intermediate-risk procedures and after 6 months of PCI. There was no significant association between antiplatelet cessation and cardiac events. Conclusions: Among patients undergoing NCS within 1 year of PCI, the perioperative risk of MACE is inversely related to time from PCI. Preoperative interruption of antiplatelet therapy was observed in less than half of all cases and was not associated with an increased risk of cardiac events.