Table 2.
Parameters extracted from PPG morphology analysis.
| No. | Parameter name | Units | Definition | Description |
|---|---|---|---|---|
| 1 | A | a.u. | Area of a pulse | The area of a pulse |
| 2 | Asys | a.u. | Area of a systolic phase | The area of a pulse from the diastolic peak to the next systolic peak |
| 3 | Adia | a.u. | Area of a diastolic phase | The area of a pulse from the systolic peak to the next diastolic peak |
| 4 | TriA | a.u. | Triangular Area of a pulse | The area of the triangle made up of two adjacent diastole peaks and the systolic peak between them |
| 5 | TriAsys | a.u. | Triangular Area of a systolic phase | The area of triangle made up of diastolic peak, following systolic peak and intersection of the horizontal line of diastolic peak and vertical line of systolic peak |
| 6 | TriAdia | a.u. | Triangular Area of a diastolic phase | The area of triangle made up of systolic peak, following diastolic peak and intersection of the horizontal line of diastolic peak and vertical line of systolic peak |
| 7 | Lsys | ms | Systolic length | The time interval between diastolic peak and next systolic peak |
| 8 | Ldia | ms | Diastolic length | The time interval between systolic peak and next diastolic peak |
| 9 | PPIsys | ms | Systolic Peak Interval | The time interval between adjacent systolic peaks |
| 10 | PPIdia | ms | Diastolic Peak Interval | The time interval between adjacent diastolic peaks |
| 11 | ACAdia | a.u. | AC Amplitude from previous diastole | Difference of the systolic peak amplitude and the previous diastolic peak amplitude |
| 12 | ACAbl | a.u. | AC Amplitude from baseline | Difference of the systolic peak amplitude and the interpolated baseline amplitude of two adjacent diastolic peaks |
| 13 | ACVsys | a.u. | AC Variation Systole | Difference of the amplitude of systolic peaks |
| 14 | ACVdia | a.u. | AC Variation Diastole | Difference of the amplitude of diastolic peaks |
| 15 | RS | a.u. | Rising Slope | Slope between the diastolic peak and the next systolic peak |
| 16 | LRS | a.u. | Rising Slope Length | Distance between the diastolic peak and the next systolic peak |
| 17 | RSmax | a.u. | Maximum Rising Slope | Maximum slope in the interval from the diastolic peak to the next systolic peak |
| 18 | FS | a.u. | Falling Slope | Slope between the systolic peak and the next diastolic peak |
| 19 | LFS | a.u. | Falling Slope Length | Distance between the systolic peak and the next diastolic peak |
| 20–23 | PWx | ms | Pulse Width at x% of maximum amplitude, x = 30, 50, 70, 90 | Pulse width at x% point of maximum amplitude |