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with Transcatheter aortic valve as keyword

Impact of patient-specific morphologies on sinus flow stasis in transcatheter aortic valve replacement: An in vitro stud...

Published in The Journal of thoracic and cardiovascular surgery

The goal of this study is to evaluate how sinus flow patterns after transcatheter aortic valve replacement in realistic representative patient roots vary. Sinus flow can affect transcatheter aortic valve operation and likely leaflet thrombosis occurrence due to stasis and poor washout. How the interaction between transcatheter aortic valve and repr...

Optimization of a transcatheter heart valve frame using patient-specific computer simulation

Purpose This study proposes a new framework to optimize the design of a transcatheter aortic valve through patient-specific finite element and fluid dynamics simulation. Methods Two geometrical parameters of the frame, the diameter at ventricular inflow and the height of the first row of cells, were examined using the central composite design. The ...

Facteur Willebrand et modifications hémodynamiques associées à l’utilisation de dispositifs cardiovasculaires : mécanism...

Le facteur Willebrand (VWF) est une proteine multimerique qui a une sensibilite unique aux forces de cisaillement et aux variations hemodynamiques du flux sanguin comme celles rencontrees lors d’utilisation de dispositifs cardiovasculaires tels qu’un remplacement valvulaire aortique transcatheter (TAVI) ou un assistance circulatoire mecanique a flu...

Simulated Transcatheter Aortic Valve Flow: Implications of Elliptical Deployment and Under-Expansion at the Aortic Annul...

Published in Artificial organs

Clinical use of transcatheter aortic valves (TAVs) has been associated with abnormal deployment, including oval deployment and under-expansion when placed into calcified aortic annuli. In this study, we performed an integrated computational and experimental investigation to quantify the impact of abnormal deployment at the aortic annulus on TAV hem...

Effect of severe bioprosthetic valve tissue ingrowth and inflow calcification on valve-in-valve performance.

Published in Journal of biomechanics

While in vivo studies clearly demonstrate that supra-annular Valve-in-Valve (ViV) implantation provides the highest probability for optimal post-ViV pressure gradients (PG), there is still no physical insight into explaining anomalies where some supra-annular ViV implantations yield high pressure gradients while some sub-annular implantations yield...

Maximum Aortic Valve Opening Phase for Annulus Sizing in Pre-TAVR CTA.

Published in Academic radiology

The optimal phase for the measurement of the aortic annular area for transcatheter aortic valve replacement (TAVR) is not standardized, although most agree that systolic measurements are preferred, when the annulus is larger. We hypothesized that the maximum annular area occurs at the cardiac phase of the maximum aortic valve opening (MAVO) and tha...

Transcatheter aortic valve implantation using the ACURATE TA™ system: 1-year outcomes and comparison of 500 patients fro...

Published in European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery

The ACURATE TA TM system is a self-expanding transcatheter heart valve system designed for transapical access which has been proven to be safe and effective in the controlled setting of clinical trials. The SAVI-1 and SAVI-2 registries aimed to assess whether these promising outcomes can be translated into all-comers clinical routine. From November...

RE: 'Streptococcus pluranimalium: A novel human pathogen?'

Published in International journal of surgery case reports

Streptococcus pluranimalium as a novel human pathogen has been reported by several authors in various contexts. In all reported cases in humans the microorganism was detected by the Vitek2®. The great advances with the introduction of new analytical techniques such as MALDI-TOF or 16S rRNA analysis enabled a more detailed discrimination of pathogen...

Clinical outcomes and direct costs after transcatheter aortic valve implantation in French centres: a longitudinal study...

OBJECTIVES: To describe the clinical outcomes of patients undergoing transcatheter aortic valve implantation (TAVI) and to determine the direct costs before and after TAVI. METHODS: A nationwide longitudinal study using data extracted from the French Hospital Information System. Selection criteria: all patients who underwent TAVI between 1 January ...