2026, Supplement 2
Cardiovasc Metab Sci 2026; 37 (S2)
Post-coronary revascularization mortality according to preoperative left ventricular function in Mexican patients
Borgo-Navarro, Diego Abraham; Gloria-Valencia, Natalia; Flores-Salinas, Héctor Enrique
ABSTRACT
Introduction: coronary artery bypass grafting is the gold standard treatment for patients with complex multivessel disease. While short- and long-term mortality are the clinical outcomes traditionally evaluated, perioperative morbidity assumes critical and decisive importance in high-cardiovascular-risk populations. Currently, there is a gap regarding the validation of traditional risk scores within the Mexican population. Objective: to evaluate the association between preoperative left ventricular function— quantified using systolic and diastolic parameters—and early clinical outcomes in a Mexican population undergoing myocardial revascularization. Material and methods: an observational, analytical, retrospective study was conducted at a tertiary-care hospital. The study included 120 consecutive patients undergoing coronary artery bypass grafting with cardiopulmonary bypass. For analysis, patients were divided into two groups: those with preserved left ventricular ejection fraction (LVEF) (≥ 50%) and those with non-preserved LVEF (‹ 50%). Echocardiographic follow-up was implemented, and a multivariate statistical analysis using Cox regression was performed to evaluate independent risk predictors, comparing them against international predictive scales. Results: fiftyfour patients (45%) presented with non-preserved LVEF. This group exhibited impaired diastolic function (mean e’ wave 6.4 vs. 7.9 cm/s, p = 0.018; E/e’ ratio 11.1 vs. 9.6, p = 0.009). Notably, the EuroSCORE II and STS calculators showed no predictive significance within this cohort. In the multivariate model, non-preserved LVEF quadrupled the risk of early mortality (HR 4.09, p = 0.057). Hospital stay was longer (27.0 vs. 13.4 days, p = 0.021) in patients with ventricular dysfunction. Conclusion: among Mexican patients, non-preserved LVEF and diastolic dysfunction reduce short-term survival and increase morbidity and hospital resource utilization, thereby necessitating comprehensive echocardiographic risk stratification. The lack of predictive capacity of international calculators highlights the urgent need to develop local risk models.