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Full-Text Articles in Biomedical Engineering and Bioengineering
Comparison Of Performance Of Self-Expanding And Balloon-Expandable Transcatheter Aortic Valves, Hoda Hatoum, Milad Samaee, Janarthanan Sathananthan, Stephanie Sellers, Maximilian Kuetting, Scott M. Lilly, Abdul R. Ihdayhid, Philipp Blanke, Jonathon Leipsic, Vinod H. Thourani, Lakshmi Prasad Dasi
Comparison Of Performance Of Self-Expanding And Balloon-Expandable Transcatheter Aortic Valves, Hoda Hatoum, Milad Samaee, Janarthanan Sathananthan, Stephanie Sellers, Maximilian Kuetting, Scott M. Lilly, Abdul R. Ihdayhid, Philipp Blanke, Jonathon Leipsic, Vinod H. Thourani, Lakshmi Prasad Dasi
Michigan Tech Publications
Objective: To evaluate the flow dynamics of self-expanding and balloon-expandable transcatheter aortic valves pertaining to turbulence and pressure recovery. Transcatheter aortic valves are characterized by different designs that have different valve performance and outcomes. Methods: Assessment of transcatheter aortic valves was performed using self-expanding devices (26-mm Evolut [Medtronic], 23-mm Allegra [New Valve Technologies], and small Acurate neo [Boston Scientific]) and a balloon-expandable device (23-mm Sapien 3 [Edwards Lifesciences]). Particle image velocimetry assessed the flow downstream. A Millar catheter was used for pressure recovery calculation. Velocity, Reynolds shear stresses, viscous shear stress, and pressure gradients were calculated. Results: The maximal velocity …
Gradient And Pressure Recovery Of A Self-Expandable Transcatheter Aortic Valve Depends On Ascending Aorta Size: In Vitro Study, Milad Samaee, Hoda Hatoum, Michael Biersmith, Breandan Yeats, Shelley C. Gooden, Vinod H. Thourani, Rebecca T. Hahn, Scott Lilly, Ajit Yoganathan, Lakshmi Prasad Dasi
Gradient And Pressure Recovery Of A Self-Expandable Transcatheter Aortic Valve Depends On Ascending Aorta Size: In Vitro Study, Milad Samaee, Hoda Hatoum, Michael Biersmith, Breandan Yeats, Shelley C. Gooden, Vinod H. Thourani, Rebecca T. Hahn, Scott Lilly, Ajit Yoganathan, Lakshmi Prasad Dasi
Michigan Tech Publications
Objective: In this study we aimed to understand the role of interaction of the Medtronic Evolut R transcatheter aortic valve with the ascending aorta (AA) by evaluating the performance of the valve and the pressure recovery in different AA diameters with the same aortic annulus size. Methods: A 26-mm Medtronic Evolut R valve was tested using a left heart simulator in aortic root models of different AA diameter (D): small (D = 23 mm), medium (D = 28 mm), and large (D = 34 mm) under physiological conditions. Measurements of pressure from upstream to downstream of the valve were performed …