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 |