Table 1. HRV Parameters for all Patients a, b.
| HRV Parameter | Total | Day | Night | P Value (day/night) |
|---|---|---|---|---|
| Mean-HR, bpm | 68.1 ± 11.1 | - | - | - |
| Minimum HR, bpm | 55.4 ± 10.4 | - | - | - |
| pNN50, % | 8.16 ± 9.03 | - | - | - |
| SDNN, ms | 98.74 ± 37.99 | 87.80 ± 36.55 | 93.57 ± 44.11 | ns (0.295) |
| RMSSD, ms | 44.31 ± 33.69 | 44.32 ± 39.94 | 41.91 ± 24.98 | ns (0.604) |
| Triangular Index | 12.86 ± 4.21 | |||
| SDNN Index | 36.29 ± 18.96 | 35.70 ± 21.81 | 37.43 ± 17.92 | ns (0.481) |
| SDANN, ms | 88.05 ± 35.77 | 76.75 ± 29.85 | 82.32 ± 42.60 | ns (0.202) |
a Abbreviations: Mean-HR and Minimum HR, mean and minimum heart rates recorded at the 24-h Holter monitoring; pNN50, proportion of successive beats with differences in NN intervals > 50 ms; SDNN, standard deviation of all normal RR intervals; RMSSD, square root of the mean square differences of successive NN intervals; SDNN Index, average of the standard deviations of all NN intervals for each 5-minute segments; SDANN, standard deviation of the 5-min average of NN intervals; P (day/night): level of significance in student t-test for paired samples, between day and night values of HRV parameters.
b Data are presented as Mean ± SD.