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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1964 1
1965 2
1967 1
1969 1
1971 2
1974 3
1975 3
1976 3
1977 2
1978 1
1979 1
1980 1
1981 1
1983 1
1984 2
1985 5
1986 5
1987 4
1988 4
1989 1
1990 2
1991 6
1992 8
1993 8
1994 12
1995 17
1996 23
1997 38
1998 40
1999 47
2000 75
2001 66
2002 70
2003 48
2004 80
2005 122
2006 110
2007 112
2008 118
2009 135
2010 135
2011 144
2012 148
2013 144
2014 138
2015 136
2016 143
2017 142
2018 213
2019 207
2020 238
2021 275
2022 263
2023 281
2024 44

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3,554 results

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Page 1
Physiological time-series analysis using approximate entropy and sample entropy.
Richman JS, Moorman JR. Richman JS, et al. Am J Physiol Heart Circ Physiol. 2000 Jun;278(6):H2039-49. doi: 10.1152/ajpheart.2000.278.6.H2039. Am J Physiol Heart Circ Physiol. 2000. PMID: 10843903 Free article.
Entropy, as it relates to dynamical systems, is the rate of information production. ...Pincus introduced approximate entropy (ApEn), a set of measures of system complexity closely related to entropy, which is easily applied to clinical cardiovascular a
Entropy, as it relates to dynamical systems, is the rate of information production. ...Pincus introduced approximate entrop
ECG Approximate Entropy in the Elderly during Cycling Exercise.
Liou JW, Wang PS, Wu YT, Lee SK, Chang SD, Liou M. Liou JW, et al. Sensors (Basel). 2022 Jul 14;22(14):5255. doi: 10.3390/s22145255. Sensors (Basel). 2022. PMID: 35890935 Free PMC article.
Approximate entropy (ApEn) is used as a nonlinear measure of heart-rate variability (HRV) in the analysis of ECG time-series recordings. ...
Approximate entropy (ApEn) is used as a nonlinear measure of heart-rate variability (HRV) in the analysis of ECG time-series r
Approximate entropy as indication of goodness-of-fit.
Johnson ML, Straume M. Johnson ML, et al. Methods Enzymol. 2000;321:207-16. doi: 10.1016/s0076-6879(00)21195-6. Methods Enzymol. 2000. PMID: 10909059 Review. No abstract available.
Photoplethysmography-derived approximate entropy and sample entropy as measures of analgesia depth during propofol-remifentanil anesthesia.
Chen W, Jiang F, Chen X, Feng Y, Miao J, Chen S, Jiao C, Chen H. Chen W, et al. J Clin Monit Comput. 2021 Apr;35(2):297-305. doi: 10.1007/s10877-020-00470-6. Epub 2020 Feb 5. J Clin Monit Comput. 2021. PMID: 32026257 Clinical Trial.
The present work studied the properties of nonlinear methods including approximate entropy (ApEn) and sample entropy (SampEn) derived from PPG responding to a nociceptive stimulus under various opioid concentrations. Forty patients with ASA I or II were rando …
The present work studied the properties of nonlinear methods including approximate entropy (ApEn) and sample entropy (S …
Approximate entropy analysis across electroencephalographic rhythmic frequency bands during physiological aging of human brain.
Pappalettera C, Cacciotti A, Nucci L, Miraglia F, Rossini PM, Vecchio F. Pappalettera C, et al. Geroscience. 2023 Apr;45(2):1131-1145. doi: 10.1007/s11357-022-00710-4. Epub 2022 Dec 20. Geroscience. 2023. PMID: 36538178 Free PMC article.
In the present study, we analyzed the effects of physiological aging on the human brain through entropy measures of electroencephalographic (EEG) signals. One hundred sixty-one participants were recruited and divided according to their age into young (n = 72) and elderly ( …
In the present study, we analyzed the effects of physiological aging on the human brain through entropy measures of electroencephalog …
Approximate entropy of network parameters.
West J, Lacasa L, Severini S, Teschendorff A. West J, et al. Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Apr;85(4 Pt 2):046111. doi: 10.1103/PhysRevE.85.046111. Epub 2012 Apr 19. Phys Rev E Stat Nonlin Soft Matter Phys. 2012. PMID: 22680542 Free article.
We study the notion of approximate entropy within the framework of network theory. Approximate entropy is an uncertainty measure originally proposed in the context of dynamical systems and time series. We first define a purely structural entropy
We study the notion of approximate entropy within the framework of network theory. Approximate entropy is an unc …
Fuzzy Approximate Entropy of Extrema Based on Multiple Moving Averages as a Novel Approach in Obstructive Sleep Apnea Screening.
Weng P, Wei K, Chen T, Chen M, Liu G. Weng P, et al. IEEE J Transl Eng Health Med. 2022 Aug 11;10:4901211. doi: 10.1109/JTEHM.2022.3197084. eCollection 2022. IEEE J Transl Eng Health Med. 2022. PMID: 36247084 Free PMC article.
As a novel method for analyzing OSA depending on heart rate variability, fuzzy approximate entropy of extrema based on multiple moving averages (Emma-fApEn) can effectively assess the sympathetic tension limits, thereby realizing a good performance in the disease se …
As a novel method for analyzing OSA depending on heart rate variability, fuzzy approximate entropy of extrema based on multipl …
Binarized cross-approximate entropy in crowdsensing environment.
Skoric T, Mohamoud O, Milovanovic B, Japundzic-Zigon N, Bajic D. Skoric T, et al. Comput Biol Med. 2017 Jan 1;80:137-147. doi: 10.1016/j.compbiomed.2016.11.019. Epub 2016 Dec 1. Comput Biol Med. 2017. PMID: 27940288
This paper proposes a computationally efficient binarised cross-approximate entropy, referred to as (X)BinEn, for unsupervised cardiovascular signal processing in environments where energy and processor resources are limited. METHODS: The proposed method is a descen …
This paper proposes a computationally efficient binarised cross-approximate entropy, referred to as (X)BinEn, for unsupervised …
HRV analysis: undependability of approximate entropy at locating optimum complexity in malnourished children.
Garner DM, Barreto GS, Valenti VE, Vanderlei FM, Porto AA, Vanderlei LCM. Garner DM, et al. Cardiol Young. 2022 Mar;32(3):425-430. doi: 10.1017/S1047951121002316. Epub 2021 Jun 17. Cardiol Young. 2022. PMID: 34134801
INTRODUCTION: Approximate Entropy is an extensively enforced metric to evaluate chaotic responses and irregularities of RR intervals sourced from an eletrocardiogram. ...Nevertheless, Approximate Entropy is still an unreliable mathematical marker to re …
INTRODUCTION: Approximate Entropy is an extensively enforced metric to evaluate chaotic responses and irregularities of RR int …
Entropy for the Complexity of Physiological Signal Dynamics.
Zhang XD. Zhang XD. Adv Exp Med Biol. 2017;1028:39-53. doi: 10.1007/978-981-10-6041-0_3. Adv Exp Med Biol. 2017. PMID: 29058215 Review.
The concepts include Shannon entropy, Kolmogorov entropy, Renyi entropy, approximate entropy, sample entropy, and multiscale entropy. I also demonstrate an example of using entropy for the complexity of glucose dynamics....
The concepts include Shannon entropy, Kolmogorov entropy, Renyi entropy, approximate entropy, sample e
3,554 results