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. Author manuscript; available in PMC: 2015 Jun 5.
Published in final edited form as: Pediatr Cardiol. 2014 Jul 24;36(1):41–48. doi: 10.1007/s00246-014-0962-y

Table 2.

Normative heart rate variability percentile values adjusted for age and heart rate, by sex

Boys
Girls
5th 25th 50th 85th 95th 5th 25th 50th 85th 95th
Time-domain
SDNN (ms) 71.1 83.9 95.5 111.7 124.9 76.4 89.9 100.3 117.0 128.5
SDANN (ms) 15.1 20.0 24.5 31.1 36.3 17.8 23.3 27.2 33.9 38.8
SDNNi (ms) 84.0 95.8 106.7 121.6 134.4 89.0 101.3 110.8 126.3 136.5
rMSSD (ms) 41.2 49.0 56.0 65.9 73.9 45.4 53.6 59.9 70.1 77.1
pNN50 (%) 31.7 38.0 43.7 51.8 58.3 34.9 41.6 46.7 55.0 60.7
Frequency-domain
VLF (ms2) 2,936.8 3,363.0 3,756.2 4,293.0 4,749.6 3,131.4 3,573.7 3,914.1 4,474.7 4,843.7
LF (ms2) 3,882.1 4,316.6 4,713.3 5,270.7 5,765.8 4,079.9 4,541.8 4,892.4 5,448.8 5,801.6
HF (ms2) 1,668.4 1,946.6 2,202.3 2,559.9 2,857.2 1,797.2 2,094.6 2,322.4 2,695.9 2,945.9
lnVLF 2.6 2.9 3.2 3.5 3.9 2.7 3.0 3.3 3.6 3.9
lnLF 3.4 3.7 3.9 4.3 4.7 3.5 3.8 4.0 4.4 4.7
lnHF 2.9 3.3 3.7 4.2 4.6 3.1 3.5 3.8 4.3 4.6
LF:HF ratio 0.0 0.1 0.2 0.4 0.5 0.0 0.1 0.2 0.4 0.6

Ms milliseconds, ln log-transformed value