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Table 2 Pre- and post-operative echocardiographic data.

From: Evaluation of 17-mm St. Jude Medical Regent prosthetic aortic heart valves by rest and dobutamine stress echocardiography

Variables before surgery after surgery p-value
BSA m2 1.6 ± 0.2   
LVOT mm 17.5 ± 1.5   
Effective Orifice Area (cm2) 0.6 ± 0.2 1.1 ± 0.3 <0.0001
Indexed Effective Orifice Area (cm2/m2) 0.36 ± 0.9 0.7 ± 0.2 <0.0001
Maximal velocity (m/sec) 4.6 ± 0.6 2.7 ± 0.4 <0.0001
Mean velocity (m/sec) 3.6 ± 0.5 1.8 ± 0.3 <0.0001
Maximal gradient (mmHg) 88.2 ± 20.3 32.6 ± 11.3 <0.0001
Mean gradient (mmHg) 53.5 ± 13.6 16.6 ± 5.8 <0.0001
VTI LVOT (cm) 25.5 ± 6.9 27.45 ± 9.6 NS
VTI transvalvular (cm) 105.3 ± 20.1 57.2 ± 15.79 <0.0001
Doppler Velocity Index 0.24 ± 0.1 0.47 ± 0.1 <0.0001
Left Ventricular Mass (g) 258 ± 43 NA  
Indexed Left Ventricular Mass (g/m2) 157.4 ± 27.7 NA