Fig. 3
The relationship between actual opt-SAV/opt-PAV and the calculated opt-SAV/opt-PAV. The scatter plots between actual opt-SAV and the calculated opt-SAV (a) and between actual opt-PAV and the calculated opt-PAV (b). Actual opt-SAV/opt-PAV was the SAV/PAV with the maximum aortic velocity–time integral. Calculated opt-SAV = 0.1 × SAVopt-AV + 0.4 × SAVopt-V + 70 ms (n = 22, R2 = 0.665, P < 0.01); calculated opt-PAV = 0.25 × PAVopt-AV + 0.5 × PAVopt-V + 30 ms (n = 20, R2 = 0.560, P < 0.01)