Table 2.
HRV indices in no CAD and CAD groups
| Index | No DAC (n = 21) | DAC (n=43) | p |
|---|---|---|---|
|
RR (ms) |
896±136 |
914±139 |
0.6191 |
|
SDNN (ms) |
39.71±18.7 |
29.95±13.6 |
0.0209 * |
|
RMSSD (ms) |
32.38±18.1 |
22.99±11.9 |
0.0303 ** |
|
NN50 (count) |
135.48±146.28 |
59.42±80.9 |
0.0476 ** |
|
VLF (ms2) |
323.67±420.49 |
220.56±242.8 |
0.2058 |
|
LF (ms2) |
332.48±420.78 |
179.12±175.08 |
0.0641 |
|
HF (ms2) |
233.10±241.7 |
87.72±81.04 |
0.0073 ** |
|
SD1 (ms) |
23.21±12.9 |
16.52±16.52 |
0.0282 * |
|
SD2 (ms) |
67.19±25.9 |
52.75±25.6 |
0.0387 * |
|
SD1/SD2 |
0.33±0.1 |
0.34±0.1 |
0.6269 |
|
α1 |
0.93±0.2 |
1±0.3 |
0.2189 |
|
α2 |
0.9±0.2 |
0.91±0.1 |
0.5577 |
|
Lyapunov exponent (LE) |
0.91±0.1 |
0.89±0.1 |
0.4416 |
|
Hurst exponent (HE) |
0.21±0.1 |
0.22±0.1 |
0.6294 |
| -ApEn | 0.388±0.09 | 0.343±0.08 | 0.0368 ** |
* = p <0.05 with area under ROC curve < 0.65; ** = p <0.05 with area under ROC curve ≥ 0.65.