Previous percutaneous coronary intervention increases morbidity after coronary artery bypass grafting

Background: We hypothesized that the incidence of previous percutaneous coronary intervention (PCI) is increasing and that prior PCI influences patient morbidity and mortality after coronary artery bypass grafting (CABG). Methods: A total of 34,316 patients underwent isolated CABG operations at 16 different statewide, institutions from 2001 to 2008. Patients were stratified into prior PCI (n = 4346; 12.7%) and no prior PCI (n = 29,970). Patient risk factors, intraoperative variables, and outcomes were compared by univariate and multivariate analyses. Results: The incidence of prior PCI in CABG has risen from <1% to 22.0% from 2001 to 2008 (P < .001). Prior PCI patients were younger (P < .001) and more commonly had previous myocardial infarction (P < .001), but less commonly had heart failure (P < .001). The operative mortality was similar between groups (2.3% vs 1.9%; P = .13). Prior PCI patients had more major complications (15.0% vs 12.0%; P < .001), longer hospitalization (P = .01), and higher readmission rates (P = .01). Importantly, by multivariate analyses, prior PCI was not associated with mortality, but was an independent predictor of major complications after CABG (odds ratio, 1.15; P = .01). Conclusion: The incidence of prior PCI in patients undergoing CABG is increasing. Previous PCI is associated with a higher risk of major complications, greater hospital length of stay, and higher readmission rates after CABG.