Table 1. Heart interbeat interval in the time domain.
| Maneuver | Sex | μ (s) | SD (s) | sk | κ | SD/μ | |
|---|---|---|---|---|---|---|---|
| Controls | Supine | F | 0.9 ± 0.1 | 0.05 ± 0.02 | -0.2 ± 0.5 | 1 ± 1 | 0.05 ± 0.02 |
| M | 1.0 ± 0.1 | 0.06 ± 0.02 | -0.3 ± 0.4 | 0.4 ± 0.8 | 0.06 ± 0.02 | ||
| Standing up | F | 0.8 ± 0.1 | 0.05 ± 0.02 | 0.1 ± 0.4 | 0.03 ± 0.6 | 0.06 ± 0.03 | |
| M | 0.8 ± 0.1 | 0.07 ± 0.04 | 0.3 ± 0.5 | 0.2 ± 1 | 0.09 ± 0.03 | ||
| Breathing at 0.1 Hz | F | 0.8 ± 0.1 | 0.09 ± 0.03 | 0.0 ± 0.4 | -0.8 ± 0.8 | 0.11 ± 0.04 | |
| M | 0.9 ± 0.1 | 0.09 ± 0.04 | 0.1 ± 0.4 | -0.6 ± 0.8 | 0.10 ± 0.04 | ||
| Achalasia | Supine | F | 0.8 ± 0.1 | 0.03 ± 0.01* (p = 0.007) | 0.2 ± 0.6* (p = 0.01) | 0.7 ± 2 | 0.04 ± 0.01 |
| M | 1.0 ± 0.2 | 0.05 ± 0.02 | -0.4 ± 0.1 | 0.4 ± 1 | 0.06 ± 0.03 | ||
| Standing up | F | 0.7 ± 0.1 | 0.05 ± 0.02 | -0.8 ± 1* (p = 0.04) | 5 ± 6* (p = 0.03) | 0.06 ± 0.02 | |
| M | 0.9 ± 0.2 | 0.08 ± 0.02 | -0.4 ± 0.4* (p = 0.04) | 0.7 ± 0.7* (p = 0.04) | 0.08 ± 0.02 | ||
| Breathing at 0.1 Hz | F | 0.8 ± 0.1 | 0.06 ± 0.03* (p = 0.002) | 0.1 ± 0.4 | -0.6 ± 0.8 | 0.08 ± 0.04 | |
| M | 0.9 ± 0.1 | 0.08 ± 0.03 | 0.2 ± 0.1 | -1.0 ± 0.5 | 0.10 ± 0.03 |
* indicates statistically significant difference with respect to control (p value <0.05).