Table 2.
Comparisons of autonomic parameters between SCA and non‐SCA group
| 变量 | non‐SCA (n = 128) | SCA (n = 10) | p |
|---|---|---|---|
| Average heart rate, bpm | 70 (62.2, 77.0) | 77.5 (60.2, 98.0) | ns |
| SDNN, ms | 87.0 (67.0, 106.7) | 61.0 (53.5, 92.7) | .018 |
| pNN50, % | 4.0 (1.0, 11.0) | 4.5 (1.5, 18.2) | ns |
| rMSSD, ms | 23.5 (18.0, 36.0) | 24.0 (17.0, 39.5) | ns |
| TP, ms2 | 1658.5 (1,077.7, 2,969.2) | 882.5 (367.2, 1,375) | .007 |
| VLF, ms2 | 1,173.5 (746.5, 2032.0) | 453.5 (246.2, 999.2) | <.001 |
| LF, ms2 | 239.5 (149.5, 437.5) | 120.5 (53.2, 406.2) | ns |
| HF, ms2 | 130.5 (69.2, 279.7) | 64.5 (34.7, 247.7) | ns |
| LF/HF | 2.0 (1.0, 3.0) | 1.0 (1.0, 3.2) | ns |
| QTc, ms | 480.5 (453.2, 519.7) | 523.5 (458.5, 560.2) | ns |
| TO | −0.9 (−1.7, 0.0) | 0.0 (0.0, 1.1) | .004 |
| TS, ms/RR | 5.0 (2.0, 9.0) | 2.0 (0.0, 4.1) | .009 |
| VP ≥ 10/h, n (%) | 30 (23.4) | 5 (50.0) | ns |
| DC, ms | 5.0 (4.0, 7.0) | 3.0 (3.0, 5.0) | <.001 |
| AC, ms | −5.8 (−7.2, −4.5) | −5.3 (−7.8, −3.4) | ns |
| DRs risk stratification | |||
| Low‐risk, n (%) | 79 (61.7) | 0 (0.0) | <.001 |
| Medium‐risk, n (%) | 43 (33.6) | 9 (90.0) | <.001 |
| High‐risk, n (%) | 6 (4.7) | 1 (10.0) | ns |
Abbreviations: AC, acceleration capacity of heart rate; DC, Deceleration capacity of heart rate; DRs, deceleration runs of heart rate; HF, high frequency; LF, low frequency; ns, no significance; SDNN, standard deviation of normal to normal RR intervals; VLF, very low frequency.