Abstract Objectives: There are several different definitions of complete revascularization on coronary surgery across the literature. Despite the importance of this definition there is no agreement on which one has the most impact. The aim of this study was to evaluate which definition of complete surgical revascularization correlates with early and late outcomes. Methods: All consecutive patients submitted to isolated CABG from 2012 to 2016 with previous myocardial scintigraphy were evaluated. Exclusion criteria: emergent procedures and previous cardiac surgery procedures. Population of 162 patients, follow-up complete in 100% patients; median 5,5 IQR 4,4-6,9 years. Each and all of the 162 patients were classified as complying or not with the four different definitions: Numerical, Functional, Anatomical Conditional and Anatomical unconditional. Univariable and multivariable analyses were developed to detect if any definition was a predictor of perioperative and long-term outcomes. Results: Complete functional revascularization was a predictor of increased survival (HR 0.47 CI95: 0,226-0,969; p=0.041). No other definitions showed effect on follow-up mortality. Age and cardiac dysfunction increased long-term mortality. The definition of complete revascularization did not have an impact on MACCE or need for revascularization Conclusions: An uniformly accepted definition of complete coronary revascularization is lacking. This research raises awareness about the importance of viability guidance for CABG.