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Table 4 Mean pressure gradient, effective orifice area (EOA) and effective orifice area index (EOA index) at rest and during peak Dobutamine stress related to valve area

From: The Scandinavian multicenter hemodynamic evaluation of the SJM Regent aortic valve

Valve size: 19 21 23 25  
(n): (4) (18) (23) (16)  
Mean pressure (mmHg):      p:
At rest: 11.4 ± 6.2 9.2 ± 6.6 7.7 ± 3.3 6.0 ± 2.8 n.s
Peak stress: 27.3 ± 22.0 21.1 ± 10.0 16.9 ± 8.5 16.7 ± 5.8 n.s
EOA (cm2):      
At rest: 1.6 ± 0.6 1.8 ± 0.4 1.8 ± 0.5 2.8 ± 1.0 < 0. 001
Peak stress: 2.2 ± 1.5 1.9 ± 0.4 1.8 ± 0.5 2.7 ± 0.7 < 0.02
EOA index (cm2/m2):      
At rest: 1.0 ± 0.4 1.0 ± 0.2 1.0 ± 0.3 1.4 ± 0.6 n.s.
Peak stress: 1.3 ± 0.9 1.0 ± 0.4 1.2 ± 0.4 1.3 ± 0.4 n.s.