St. Jude Medical (Bileaflet) 31 mm
Peak gradient:	12 ± 6 mmHg
Mean gradient:	4.46 ± 2.22 mmHg
Peak velocity:	1.59 ± 0.33 m/s
Pressure half-time:	74 ± 13" ms
Effective orifice area:	2.03 ± 0.32 cm2