Table 2.
Estimates of HR distribution and variability extracted from 4,096 successive beats
| No sepsis (n = 38) | Sepsis (n = 10) | |
|---|---|---|
| Mean, ms | 422 (397, 438) | 410.4 (393.5, 438.2) |
| Median, ms | 417.8 (400, 432.5) | 410 (385, 437.5) |
| Skewness | 0.36 (−0.09, 1.8) | 1.36 (1.18, 1.98) |
| Kurtosis | 5.27 (3.55, 10.9) | 6.86 (4.59, 7.79) |
| SA | 1.5 (0.72, 4.22) | 3.92 (2.46, 9.81) |
| SD, ms | 16.9 (11.1, 25.6) | 15.2 (11.0, 19.2) |
| rMSSD, ms | 6.13 (3.44, 10.8) | 3.81 (2.74, 8.35) |
| PLF, ms2 × 103 | 27.7 (7.5, 48.9) | 50.2 (14.5, 129.5) |
| PHF, ms2 × 103 | 4.08 (1.53, 7.37) | 8.46 (1.98, 15.7) |
| PLF: PHF ratio | 4.9 (3.99, 6.69) | 6.79 (5.12, 9.9) |
| PTP, ms2 × 103 | 33.2 (9.35, 53.5) | 58.7 (16.6, 163.1) |
| α1 | 1.44 (1.39, 1.51) | 1.47 (1.41, 1.53) |
| α2 | 0.92 (0.8, 1.07) | 0.78 (0.71, 0.83)** |
| ApEn | 0.82 (0.61, 1) | 0.43 (0.29, 0.48)* |
| SampEn | 0.54 (0.39, 0.84) | 0.22 (0.19, 0.29)* |
Results are presented as the median (25%, 75%). SA = Sample asymmetry; rMSSD = square root of the mean of squared successive differences; PTP = mean total power (0.02–2 Hz).
*
p < 0.001,
**
p < 0.05 versus the no-sepsis group. The Mann-Whitney U test and Fisher’s exact test were used where appropriate.