St. Jude Medical (Bileaflet) 27 mm
Peak gradient:	11 ± 4 mmHg
Mean gradient:	5 ± 1.82 mmHg
Peak velocity:	1.61 ± 0.29 m/s
Pressure half-time:	75 ± 10 ms
Effective orifice area:	1.67 ± 0.17 cm2