Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"Hemodynamic performance"”.
-
A comparison of hemodynamic performance in mehcanical and biological heart valve prostheses
… valve adversely affects the fluid mechanical performance. While the choice of mechanical VS biological valve prostheses is dependent on the patient, the biological valves should have improved hemodynamic performance compared to the mechanical valves. This work focused on CFD analysis of the …
-
Application of passive flow control to mitigate the thromboembolic potential of bileaflet mechanical heart valves: an in-vitro study
… to thromboembolic complications due to poor hemodynamics, improvements to the hemodynamic performance of BMHVs are needed. In this study, we explore the concept of passive flow controls that have been widely used in aerospace industry as a novel approach towards improving BMHV design. Passive …
-
Transcatheter Mitral Valve Replacement: Structural and Hemodynamic Analysis
… mitral valve (TMV) long-term durability and hemodynamic performance is not known. TMV durability and hemodynamics must match with that of surgical bioprostheses for potential commercialization of TMVR. Experimental and computational approaches were used to find the leaflets’ three-dimensional …
-
3-DIMENSIONAL NUMERICAL AND EXPERIMENTAL STUDIES TO MODEL ARTIFICIAL HEART VALVES HEMODYNAMICS
… flow fields is a crucial step to evaluate the performances on improving heart valve engineering. With the advancement of Computational Fluid Dynamics, we are able to study the complex hemodynamics in details such as stagnation, recirculation zones and shear stresses. In this research, we …
-
Aortic Valve Replacement: The Influence of Prosthesis-Patient Mismatch for Left Ventricular Remodeling, Cardiac Function and Survival
… for aortic valve replacement (AVR) in terms of hemodynamic performance, durability, incidence of complications, and survival remains the subject of much debate. It has been suggested that valve performance is influenced by the potentially modifiable variable prosthesis-patient mismatch (PPM). …
-
Die hämodynamische und klinische Funktion der Medtronic Mosaic Bioprothese in Aortenposition
… treatment with amino oleic acid for improved hemodynamics and tissue durability. Included in a multicenter study, 100 patients (49 females) underwent aortic valve replacement with the Mosaic bioprosthesis between February 1994 and May 1999. Mean age at implant was 73.4 ± 7.3 years. Concomitant …
-
Fluid Dynamics Characterization of Transcatheter Aortic Valves
… limited clinical data in term of fluid dynamics performance of TAVs, in contrast to surgical aortic valves (SAVs). Due to limitations associated with devices that are used to evaluate the performance of TAVs in patients such as echocardiography, magnetic response imaging (MRI) and an accurate …
-
Geometry induced flow disturbances
… stents influence flow patterns may lead to more hemodynamically compatible stent designs that alleviate thrombus formation and promote endothelialization. The first study employed time-resolved Digital Particle Image Velocimetry (DPIV) to compare the hemodynamic performance of two stents in a …
-
Homopolar bearingless slice motors with magnet-free rotors for extracorporeal life support
… the associated control systems, and conducted performance tests, including pumping tests with water saline, and bovine blood. The first prototype driving a D2 steel rotor achieves a maximum rotational speed of 1730 rpm in air, where the limit comes from the position sensor's noise and the …
-
The role of the arterial glycocalyx in sphingosine-1- phosphate induced cardioprotection in the isolated heart of the Wistar rat
… and eosin staining. Results: The cardiac performance was depressed after I/R, as was reflected by decreased LVDP (P=0.02 vs. control), and an increased LVEDP (P<0.0001 vs. control). I/R also significantly increased infarct size (P=0.04 vs. control). Treatment with S1P before I/R …
-
Novel positron emission tomography applications for imaging cardiovascular disease activity
… characteristics showed limited predictive performance (c-statistic 0.64, 95% CI 0.53-0.76;) and were outperformed by a quantitative plaque analysis-based machine-learning model (c-statistic 0.72, 95% CI 0.60-0.84). After inclusion of all available data (clinical, quantitative plaque and …