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. 2023 Jun 7;23:290. doi: 10.1186/s12872-023-03309-5

Table 2.

HRV – results of the time domain analysis

Parameter AF Group
(n = 48)
NoAF Group
(n = 89)
p
Mean RR [ms] 920 ± 105 935 ± 127 0.47
Mean HR [beats/min] 66 ± 8 66 ± 9 0.63
RMSSD* [ms] 24.1 ± 11.9 26 ± 9.6 0.18
pNN50** [%] 3.8 ± 4.1 6 ± 5.5 0.02
TINN*** [ms] 171.7 ± 75.1 174.3 ± 88.4 0.87

*RMSSD – Root mean square of successive differences between normal heartbeats

**pNN50 – Percentage of successive RR intervals that differ more than 50 ms

***TINN – Triangular interpolation of the NN Interval Histogram