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

(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.