RT Journal Article T1 Etiology of tricuspid regurgitation and mortality: a multicenter cohort study A1 Rodríguez Capitán, Jorge A1 Márquez‑Camas, Paloma A1 Carmona‑Carmona, Jesús A1 Arroyo Moñino, Diego Félix A1 Chaparro‑Muñoz, Marinela A1 Soler‑González, Matías A1 García del Río, Manuel A1 Egido de la Iglesia, Teodora A1 Segovia‑Reyes, Jorge A1 Murri, Mora A1 López Salguero, José Raúl A1 Couto‑Mallón, David A1 Romero‑Cuevas, Miguel A1 Pavón-Morón, Francisco Javier A1 Gutiérrez-Bedmar, Mario A1 Jiménez‑Navarro, Manuel K1 Cardiología K1 Válvula tricúspide K1 Pronóstico médico AB Background Significant tricuspid regurgitation (TR) encompasses a wide range of etiologies, complicating a comprehensive understanding of disease progression and prognostic factors. This study aimed to assess mortality associated with significant TR, focusing on the role of valvular disease etiology and other predictive factors. Methods This is a retrospective, multicenter, cohort observational study, including all consecutive patients with moderate-to-severe or greater TR. The patients were classified into five etiological groups: organic TR, TR secondary to left valvu-lopathy, TR secondary to left or right ventricular dysfunction, TR secondary to pulmonary hypertension, and atrial TR. The long-term mortality was assessed (median follow-up: 39.8 months). Results 757 patients were included. The overall mortality incidence rate was 162.5 deaths per 1000 patient-years. Compared to atrial TR, all other etiologies presented a higher mortality risk: organic TR adjusted hazard ratio (aHR) = 2.344 (95% confidence interval [CI]: 1.138–4.829), left valvulopathy-related TR aHR = 1.901 (95% CI: 1.011–3.574), ventricular dysfunction-related TR aHR = 3.683 (95% CI: 1.627–8.338), and pulmonary hypertension-related TR aHR = 2.446 (95% CI: 1.215–4.927). In addition to known factors, male sex was associated with a higher mortality risk (aHR = 1.608, 1.175–2.201),while beta-blocker use was linked to a lower risk (aHR = 0.674, 0.502–0.904).Conclusions In a large cohort of patients with significant TR, and after adjusting for clinical and echocardiographic variables, all etiological groups exhibited a higher mortality risk compared to atrial TR. Additionally, male patients with TRhad a higher mortality risk, while beta-blocker therapy emerged as a protective factor. PB Springer Nature YR 2025 FD 2025 LK https://hdl.handle.net/10630/38607 UL https://hdl.handle.net/10630/38607 LA eng NO Rodríguez-Capitán, J., Márquez-Camas, P., Carmona-Carmona, J. et al. Etiology of tricuspid regurgitation and mortality: a multicenter cohort study. Clin Res Cardiol (2025). https://doi.org/10.1007/s00392-025-02662-z NO Funding for open access charge: Universidad de Málaga/CBUA. This research was supported by the Andalusian Society of Cardiology (General Research Grants, 2019). M.M. is sup- ported by Miguel Servet II program (CPII22-00013) from ISCIII and co-funded by the European Union, and by Nicolás Monardes Program from Consejería de Salud de Andalucía, Spain (C10002-2022) the pro- ject “PI23/00293” from ISCIII and co-funded by the European Union DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 21 ene 2026