A retrospective, observational, and descriptive study conducted at the Hospital Universitario de Álava. A total of 101 patients underwent a pre‑TAVI CT scan from May 2019 to October 2022. Patients scheduled for interventions other than TAVI (e.g., Valve-in-Valve, TMVR) were excluded.

• Data Acquisition:

Radiological data were obtained through the IMPAX system for image analysis, while clinical information was collected retrospectively from digital medical records, ensuring patient anonymity and data protection.

• Variables Analyzed:

1. • Quantitative Variables: Patient age, native valve diameters measured on CT, and the size of the implanted prosthesis.
2. • Qualitative Variables: Type of prosthesis used (Edwards Sapien, CoreValve Evolut, Portico, Navitor, Acurate Neo2), intra‑ and postoperative complications, access route (predominantly transfemoral), and mortality (whether directly attributable to TAVI or not).

• Statistical Analysis:

Linear regression was applied to assess the relationship between native valve diameters (as measured by CT) and the size of the prosthesis implanted, revealing a highly significant correlation (p = 5.48×10⁻¹âµ). Additionally, Fisher’s exact test was used to evaluate the association between prosthesis type and the incidence of complications (p = 0.03821). A p‑value < 0.05 was considered statistically significant.