A Novel Approach to Assessing In-Hospital Mortality After On-Pump Aortic Valve Replacement.

BACKGROUND: Surgical aortic valve replacement (SAVR) is the main treatment for severe aortic valve disease, the most common valvular heart disease worldwide. METHODS: We evaluated the in-hospital mortality risk factors and predictors following on-pump SAVR. We retrospectively reviewed data from consecutive patients treated at a tertiary center from 2022 to 2024, focusing on routine hematological data and inflammatory indexes, alongside established factors. RESULTS: Postoperative vasoactive-inotropic score (VIS) (OR 1.058, CI 95%: 1.007-1.112), platelet count (OR 1.033, CI 95%: 1.002-1.064), lymphocyte counts (OR 3.532, CI 95%: 1.507-8.278), and perioperative fresh frozen plasma transfusion (OR 1.335, CI 95%: 1.068-1.669) were independent risk factors for SAVR in-hospital mortality. VIS best predicted the endpoint (AUC 0.929, p = 0.001). Postoperative platelet count and platelet-to-lymphocytes ratio (PLR) outperformed the additive EuroSCORE in predicting the outcome, but not EuroSCORE II. CONCLUSIONS: Although EuroSCORE II remained superior to inflammatory indexes in predicting in-hospital death, the dynamic postoperative monitoring provided added value beyond static preoperative risk scores. This dynamic approach supported personalized monitoring and targeted therapeutic interventions. Postoperative VIS, platelet, lymphocyte counts, and PLR represent dynamic, low-cost predictors of in-hospital mortality after on-pump SAVR, offering a complementary value to EuroSCORE II-based models.