Artificial heart valve has already been developed and studied for a long time [1]. Mechanical heart valves with flexible leaflets made of segmented polyurethane(PU) have reduced the phenomena of thrombus greatly due to the good biocompatibility of segment Artificial heart valve has already been developed and studied for a long time [1]. Mechanical heart valves with flexible leaflets made of segmented polyurethane(PU) have reduced the phenomena of thrombus greatly due to the good biocompatibility of segment
