Safety, effectiveness and haemodynamic performance of a new stented aortic valve bioprosthesis
OBJECTIVES: We assessed the safety, effectiveness and haemodynamic performance of a new bovine stented aortic valve bioprosthesis (Avalus™).
METHODS: The PERIGON Pivotal Trial is a prospective, non-randomized, multicentre study. Subjects had symptomatic moderate or severe aortic stenosis or chronic, severe aortic regurgitation. Death, valve-related adverse events (AEs), functional recovery and haemodynamic performance were assessed at discharge, 3-6 months and 1 year. The primary analysis compared 'late' (>30 days post-implant) linearized rates of valve-related thromboembolism, thrombosis, all and major haemorrhage, all and major paravalvular leak (PVL) and endocarditis after implantation with objective performance criteria (OPC) for AEs, in accordance with EN ISO 5840:2009. We hypothesized that the upper 95% confidence bounds of the true linearized AE rates would be ≥ 2 × OPC; rejection of the null hypothesis would demonstrate that these rates were below acceptable rates. The analysis was required to include at least 150 patients followed to 1 year and 400 valve-years. Kaplan-Meier survival analysis was also performed.
RESULTS: Total number of valve-years was 459.5 (n = 686). Linearized rates were <2 × OPC for death and valve-related thromboembolism, valve thrombosis, all and major PVL, and endocarditis, but ≥2 × OPC for all and major haemorrhage. Survival at 1 year (n = 270) was 96.4%. Patients showed good functional recovery, and haemodynamic performance was within expected range.
CONCLUSIONS: This analysis demonstrated a good safety profile and clinical effectiveness of the Avalus valve except for bleeding rates. The linearized rates of all and major haemorrhage may be related to long-term anticoagulation for non-valvular indications and the length of follow-up of this cohort.
Trial registration: NCT02088554 (www.clinicaltrials.gov).
|Keywords||Aortic stenosis, Aortic valve haemodynamics, Aortic valve replacement, Avalus valve, Bioprosthetic valves, Bovine pericardial valves|
|Persistent URL||dx.doi.org/10.1093/ejcts/ezx066, hdl.handle.net/1765/106472|
|Journal||European Journal of Cardio-Thoracic Surgery|
Klautz, R.J.M, Kappetein, A.P, Lange, R, Dagenais, F. (Francois), Labrousse, L. (Louis), Bapat, V, … Sabik, J.F. (2017). Safety, effectiveness and haemodynamic performance of a new stented aortic valve bioprosthesis. European Journal of Cardio-Thoracic Surgery, 52(3), 425–431. doi:10.1093/ejcts/ezx066