Table 3.
Time and Frequency Domain Measures of HRV with SDB Stratified into OSA and CSA Conditions
| Stable | OSA | CSA | P OSAvCSA | ||
|---|---|---|---|---|---|
| TIME DOMAIN | |||||
| mean HR (bpm) | 67.1±11.7 | 64.0±9.6 | 68.6±12.6 | ns | |
| meanNN (ms) | 920±155 | 956±135 | 900±152 | ns | |
| medianNN (ms) | 920±154 | 960±136 | 902±156 | ns | |
| maxNN (ms) | 992±172 | 1093±154 * | 1003±160 | ns | |
| minNN (ms) | 851±140 | 782±113 * | 786±122 * | ns | |
| rangeNN (ms) | 141±76 | 318±132 # | 217±76 ^ | 0.037 | |
| SDNN (ms) | 22.6±12.1 | 51.3±23.8 # | 40.9±18.4 # | ns | |
| SDdNN (ms) | 29.6±12.4 | 30.9±17.5 ^ | 16.4±7.1 | 0.020 | |
| NN50 (count) | 28.6±55.8 | 70.2±82.7 * | 10.1±12.2 | 0.032 | |
| FREQUENCY DOMAIN | |||||
| TP ln (ms2) | 2.54±0.48 | 3.33±0.40 # | 3.13±0.43 # | ns | |
| VLF ln (ms2) | 1.89±0.54 | 3.00±0.45 # | 2.92±0.47 # | ns | |
| LF ln (ms2) | 1.81±0.61 | 2.52±0.55 # | 2.10±0.47 | 0.049 | |
| HF ln (ms2) | 1.89±0.61 | 2.34±0.58 ^ | 1.69±0.41 | 0.004 | |
| LF/HF | 1.18±1.01 | 2.04±1.53 ^ | 3.29±2.36 # | ns | |
| VLF% | 34.5±11.9 | 60.9±19.2 # | 78.9±13.4 # | 0.008 | |
| LF% | 29.1±10.9 | 23.1±13.8 | 14.2±8.8 # | 0.048 | |
| HF% | 36.4±18.0 | 16.0±11.7 # | 6.9±7.8 # | 0.043 | |
OSA and CSA comparison to stable breathing shown by symbols P <0.05, ^P <0.01, #P <0.001. P OSAvCSA refers to OSA and CSA comparison.