1 
approximate entropy
(496 times)

Biomedical Engineering (103 times)

HRV (64 times) SampEn (56 times) EEG (41 times)

1991 Approximate entropy as a measure of system complexity.

2 
approximate entropy statistic
(5 times)

Endocrinology (4 times)

GH (2 times) BMI (1 time) GHRH (1 time)

2000 Prediction and significance of the temporal pattern of hormone secretion in disease states.

3 
approximate entropy method
(3 times)

Biomedical Engineering (3 times)

EMG (2 times) PD (1 time) RVM (1 time)

2008 Complexity measures of the central respiratory networks during wakefulness and sleep.

4 
approximate entropy index
(2 times)

Nervous System Diseases (1 time)

HF (1 time) HRV (1 time) PD (1 time)

2004 Smoking and respiratory irregularity in panic disorder.

5 
AIMS Previously, electroencephalographic approximate entropy
(1 time)

Pharmacology (1 time)

CNS (1 time) CV (1 time) TLMC (1 time)

2011 Temporal linear mode complexity as a surrogate measure of the effect of remifentanil on the central nervous system in healthy volunteers.

6 
approximate entropy measurement
(1 time)

Aerospace Medicine (1 time)

HRV (1 time) LBNP (1 time)

1999 Effect of aerobic training on orthostatic tolerance, circulatory response, and heart rate dynamics.

7 
approximate Kolmogorov entropy
(1 time)

Neurology (1 time)

EEG (1 time) RRC (1 time)

1998 Evidence of phase transitions in heart period dynamics.

8 
complexityApproximate entropy
(1 time)

Technology (1 time)



1999 [The comparison between approximate entropy and complexity in the study of sleep EEG].

9 
sequencesApproximate entropy
(1 time)

Biomedical Engineering (1 time)



2002 [Analysis of EEG based on the complexity measure].
