RT journal article T1 Characteristics and outcomes of acute pulmonary embolism among patients with polyvascular, single-vascular or no atherosclerotic disease: insights from RIETE A1 Cardi, Silvia A1 Barco, Stefano A1 Wolf, Simon A1 Demelo‑Rodríguez, Pablo A1 Pérez‑Pinar, Montserrat A1 Skride, Andris A1 Tazi‑Mezalek, Zoubida A1 López Sáez, José Juan Bosco A1 Marchena, Pablo Javier A1 Monreal, Manuel A2 Cirugía A2 Medicina K1 Pulmonary embolism K1 Venous thromboembolism K1 Atherosclerosis K1 Cardiovascular disease K1 Platelet aggregation inhibitors K1 Registries retrospective studies AB Background The role of atherosclerosis in pulmonary embolism (PE) prognosis remains uncertain. Our study assessescharacteristics and outcomes of acute PE patients according to the presence and extent of atherosclerotic disease.Methods Using data from the RIETE registry, acute PE patients were classified into three groups based on personal history: (1) polyvascular atherosclerosis, (2) single vascular atherosclerosis, and (3) no symptomatic atherosclerosis. Primaryoutcomes included recurrent PE and venous thromboembolism (VTE), arterial events, major bleeding, and all-cause death.Hazard ratios (HR) and Kaplan–Meier curves for clinical outcomes were estimated using Cox regression models.Results Among 47,578 acute PE patients, 1,040 had polyvascular, 6,191 single-vascular, and 40,347 no atherosclerosis.During a median follow-up of 331 days, Adverse outcomes were more frequent in patients with atherosclerosis (vs. noatherosclerosis), rising with the number of affected vascular territories. Recurrent PE rates were 2.8, 1.6, and 1.2 per 100patient-years in the polyvascular, single-vascular, and no atherosclerosis groups. Multivariable analysis showed a dosedependent relationship between atherosclerosis and recurrent PE risk, with HRs of 3.2 (95% CI 1.7–5.9) and 1.6 (95% CI1.1–2.3) for polyvascular and single-vascular disease (vs. no atherosclerosis). The risk of all-cause death followed a similartrend, with HRs of 1.3 (95% CI 1.1–1.6) and 1.2 (95% CI 1.1–1.4), respectively. Major bleeding appeared to be influencedby overall health status and antithrombotic therapy intensity.Conclusion Atherosclerosis in acute PE patients may serve as a marker of disease severity and lead independently to adverseoutcomes, highlighting the importance of cardiovascular risk stratification PB Springer SN 1861-0692 YR 2025 FD 2025-06-30 LK http://hdl.handle.net/10498/38172 UL http://hdl.handle.net/10498/38172 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 10-may-2026