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. 2023 Oct 26;14:1176753. doi: 10.3389/fphys.2023.1176753

TABLE 2.

DVPs features used for clustering with the handcrafted DVP feature approach. Abb: feature name abbreviation.

Feature Abb Description
Dicrotic-diastolic notch DDR Ratio between dicrotic notch and diastolic peak amplitude. Set to 1.1 if no diastolic point is detected
Relative downslope sum RDS Area under the curve from the maximum descendet slope to the end of the pulse
Downslope derivative mean DDM Mean value of the pulse derivative after the systolic peak
Skewness Skew Measure of the pulse asymmetry
Max second derivative P_b_2Dev_A First minimum amplitude of the second derivative
Index min second derivative P_b_2Dev_i Index of the first minimum amplitude of the second derivative
Min second derivative P_a_2Dev_A Maximum amplitude of the second derivative
Index max second derivative P_a_2Dev_i Index of the maximum amplitude of the second derivative
Integral of the curve S_P_Onde Total area under the curve
Number of peaks nbr_peaks Number of peaks inside the pulse
Logarithm of Rise time log (RT) Logarithm of the rise time
Logarithm of Kurtosis log (Kurt) Logartimic measure of the “tailedness”
Augmentation index AI_bin Augmentation index, binary variable. If augmentation index could be computed the variable has high value
Down slope derivative variance log (DDV) Logarithm of the variance of the pulse derivative variance during the down slope