Abstract
In vitro assessment of different profiles for prosthetic mitral valves could result in better understanding of the physics of transmitral flow for each design. It has been postulated that decreasing the profile height of the mitral bioprosthetic valve has potential clinical benefit. In the present study, we have compared the atrial and ventricular flow characteristics in different conditions using Carpentier-Edwards PERIMOUNT™ mitral valve with various profile heights. Each valve was placed at the intersection of the left ventricle, made of transparent silicone rubber, and the left atrium in Caltech’s left heart pulsed flow simulator system. Digital particle image velocimetry (DPIV) has been used as the quantitative flow visualization technique. With the intention of studying the blood wash out, circulation was calculated based on the vorticity field around each valve. Results show that by increasing the profile’s height at the atrial side of the valve, the magnitude of circulation near the atrial side of the valve decreases. On the other hand, extreme reduction of profile’s height in ventricular side would increase the magnitude of circulation distal to the valve.
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