Sorin Allcarbon (Tilting disc) 29 mm
Peak gradient:	10 ± 2 mmHg
Mean gradient:	4 ± 1 mmHg
Peak velocity:	1.6 ± 0.2 m/s
Pressure half-time:	85 ± 23 ms
Effective orifice area:	2.8 ± 0.7 cm2