P964 Assessment of long-term durability of transcatheter implanted aortic valves - structural and nonstructural deteriorations in 5 years follow-up

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Abstract Introduction Transcatheter aortic valve implantation (TAVI) is the method of choice for patient with a significant stenosis (AS) who are contraindicated for cardio-surgical procedure. Medium – term results of TAVI are comparable with results observed for surgical replacements. There is limited knowledge of structural, nonstructural and clinical complications in five years follow-up which could contribute to TAVI indication for implantation in young patients. Goal. The aim of this study is to assess structural and non-structural deterioration of TAVI prosthesis by echocardiography and clinical evaluation at 5 years follow-up. Methods By the end of 2013, 112 patients were implanted TAVI in our center( average age, 80,4 ± 7,2 y, 53(47% ) males. All patients underwent both clinical and echocardiographic examination once a year and underwent native CT after five year. We analysed mortality, structural and non- structural deteriorations, and standard echocardiographic parameters before and after implantation, and at 5 years follow-up. Results 5-years mortality was 58%. There was not a statistically significant difference in age between the patients who survive and who died (80,2 ±7,3 vs 80,6 ± 7,3 p = 0.77) ,they had similar logistic EUROSCORE (17,0 ± 12,4 vs 16,9 ± 15,0, p = 0,96) and EF 53,8 ± 11,1 vs 52,3 ± 11,7,p= 0,51) before the procedure. 48 patients underwent the five years follow –up. Only one patient had to undergo reTAVI due to the earlier prosthetic degeneration. The average EOA was 1,88 ± 0,33 cm2), the average V max. after five years was 1,8 ± 0,4 m/s, PG max 13,6 ± 6,2 mm Hg a PG mean 8 ± 3,6 mm Hg ( no significant increase in time),Post procedural paravalvular regurgitation ≥ 2/4 appeared in 14 % patients. Twenty –three patients underwent CT scan which resulted in Agaston score O on TAVI replacement in 19(83 %) patients. Conclusion After 5 years follow-up, low rates of structural and nonstructural deterioration after TAVI were noted, suggesting good long- term durability.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.