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Table 2 The time/frequency domain and entropy features of HRV

From: Analysis of short-term heart rate and diastolic period variability using a refined fuzzy entropy method

Variables Healthy volunteers Patients with coronary artery stenosis p
SD (ms) 28.00 ± 12.91 25.81 ± 8.64 0.45
LF (ms2) 97.51 [66.71 185.33] 77.74 [50.93 127.13] 0.10
HF (ms2) 114.72 [52.76 169.30] 114.55 [51.64 170.06] 0.98
SampEn 1.92 ± 0.33 1.95 ± 0.35 0.79
FuzzyEn 1.49 ± 0.22 1.53 ± 0.20 0.44
rFuzzyEn 1.21 ± 0.14 1.25 ± 0.11 0.21
  1. SD standard deviation, LF power of low-frequency band, HF power of high-frequency band, SampEn sample entropy, FuzzyEn fuzzy entropy, rFuzzyEn refined fuzzy entropy. Data are expressed as mean ± standard deviation (SD) or median [25% 75%].