TABLE V -. Changes in abnormal P&S responses in 30 patients without CHF or angina.
| preRAN | Post-RAN | p | |
|---|---|---|---|
| 30:15 = (Stand) 30:15 ratio (unitless); E/I ratio (deep breathing) exhalation/inhalation ratio (unitless); LFa = low-frequency area = sympathetic activity (bpm2); P&S = parasympathetic and sympathetic measures; RFa = respiratory frequency area = parasympathetic activity (bpm2); SB = sympathovagal balance = LFa/RFa; SD = standard deviation; VR = Valsalva ratio (unitless). | |||
| Rest | |||
| LFa | 3.90 ± 7.88 | 1.44 ± 2.20 | 0.0001 |
| RFa | 0.81 ± 1.62 | 0.82 ± 1.48 | 0.4930 |
| SB | 4.53 ± 1.85 | 2.01 ± 1.12 | <0.0001 |
| Deep breathing | |||
| RFa | 20.1 ± 47.9 | 26.1 ± 30.4 | 0.553 |
| E/I ratio | 1.13 ± 0.10 | 1.14 ± 0.14 | 0.679 |
| Valsalva | |||
| LFa | 32.6 ± 47.9 | 30.4 ± 33.3 | 0.700 |
| VR | 1.26 ± 0.26 | 1.22 ± 0.24 | 0.130 |
| Head-up postural change (stand) | |||
| LFa | 4.27 ± 8.95 | 1.61 ± 2.29 | 0.006 |
| RFa | 1.46 ± 3.89 | 0.45 ± 0.75 | 0.139 |
| 30:15 | 1.14 ± 0.13 | 1.16 ± 0.19 | 0.919 |