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

Table 3 The time/frequency domain and entropy features of DPV

Variables	Healthy volunteers	Patients with coronary artery stenosis	p
SD (ms)	29.86 ± 13.46	26.32 ± 8.94	0.25
LF (ms²)	121.04 [86.20 213.86]	91.09 [59.53 188.22]	0.14
HF (ms²)	86.42 [37.86 131.04]	53.87 [29.89 128.03]	0.19
SampEn	1.93 ± 0.44	2.08 ± 0.41	0.14
FuzzyEn	1.42 ± 0.27	1.54 ± 0.23	0.05
rFuzzyEn	1.09 ± 0.16	1.20 ± 0.13	<0.01

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%].

ISSN: 1475-925X