Abstract
Three bi-leaflet prostheses (St. Jude Medical, Jyros and On-X valve), were tested in the mitral position under the pulsatile-flow condition. The Dynamic PIV system was employed to analyze the flow field affected by the leaflet shapes and valve designs. The Dynamic PIV system allows to acquire 1000 time-varying velocity fields at 1kHz by using Nd:YLF laser, which is synchronized with a high resolution camera (1024×1024 pixel). Detailed chronological comparison of the flow fields associated with the opening, accelerating, peak and closing phase of the flow revealed the significance of the leaflet and overall valve designs on the flow field. The small difference in leaflet configuration in the bi-leaflet prostheses generates noticeable differences on the flow.
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