Table 17.
Mean error calculated for typical HRV measures after applying cubic spline interpolation and the proposed algorithms for various gap sizes (PhysioNet database).
| Signal | Method | RMSSD | SDNN | SDSD | Total Power |
LF | HF | SD1 | SD2 |
|---|---|---|---|---|---|---|---|---|---|
| Gap w = 3 | Algorithm 2 | 0.91% | 0.29% | 0.91% | 0.79% | 2.26% | 2.37% | 0.91% | 0.31% |
| Cubic spline | 0.58% | 0.21% | 0.58% | 0.59% | 1.68% | 1.23% | 0.58% | 0.21% | |
| Gap w = 5 | Algorithm 2 | 1.21% | 0.40% | 1.21% | 1.16% | 3.87% | 3.55% | 1.21% | 0.42% |
| Cubic spline | 083% | 0.45% | 0.83% | 1.40% | 3.05% | 2.84% | 0.83% | 0.46% | |
| Gap w = 7 | Algorithm 2 | 3.06% | 0.36% | 3.06% | 1.06% | 4.28% | 4.24% | 3.06% | 0.31% |
| Cubic spline | 1.42% | 0.85% | 1.42% | 2.03% | 6.13% | 4.74% | 1.42% | 0.89% |