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Table 3 Echocardiographic data at rest and under DSE at follow up.

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

Variables at rest under peak stress p-value
Effective Orifice Area (cm2) 1.14 ± 0.3 1.2 ± 0.4 NS
Indexed Effective Orifice Area (cm2/m2) 0.76 ± 0.20 0.75 ± 0.3 NS
Maximal velocity (m/sec) 2.6 ± 0.3 4.5 ± 0.5 <0.0001
Mean velocity (m/sec) 1.7 ± 0.2 2.9 ± 0.4 <0.0001
Maximal gradient (mmHg) 29.2 ± 7.1 83.4 ± 21.9 <0.0001
Mean gradient (mmHg) 16.6 ± 5.8 43.2 ± 12.7 <0.0001
Doppler Velocity Index 0.50 ± 0.1 0.48 ± 0.1 NS
VTI LVOT (cm) 32.1 ± 10.5 34.2 ± 7.7 NS
VTI transprosthetic (cm) 62.8 ± 13.7 72.5 ± 17.3 0.032
Left Ventricular Ejection Fraction 58.4 ± 8 68 ± 9.9 <0.008
Cardiac Output (L/min) 4.7 ± 1.6 8.2 ± 2 <0.0001
Heart rate (b/min) 64.5 ± 10 100.6 ± 28 <0.001
Systolic pressure (mmHg) 139 ± 23 152 ± 26 NS
Diastolic pressure (mmHg) 77 ± 10.6 77 ± 12.5 NS
Double Product 8978 ± 2184 15225 ± 5147 <0.0001
Left Ventricular Mass (g) 191 ± 23.8 NA  
Indexed Left Ventricular Mass (g/m2) 114 ± 10.6 NA