Sorin Allcarbon (Tilting disc) 25 mm
Peak gradient:	15 ± 3 mmHg
Mean gradient:	5 ± 1 mmHg
Peak velocity:	2 ± 0.2 m/s
Pressure half-time:	105 ± 29 ms
Effective orifice area:	2.2 ± 0.6 cm2