Title :
Day-to-night variations of RR intervals complexity observed in 24-h ECG Holter R
Author :
Żurek, Sebastian ; Piskorski, Jaroslaw ; Guzik, Piotr ; Kosmider, Marcin ; Lewandowski, Marcin ; Castiglioni, Paolo
Author_Institution :
Inst. of Phys., Univ. of Zielona Gora, Zielona Góra, Poland
Abstract :
Complexity of RR intervals can be measured by Sample entropy (SampEn) traditionally estimated only for a limited number of points by fixing the values of the embedding dimension "m" and distance threshold "r". Recently we have proposed a new and fast Norm Component Matrix (NCM) algorithm for SampEn calculation - it allows analyzing whole ranges of (m, r) values leading to entropy surfaces. This study is aimed at the analysis of these surfaces in the scope of day-to-night variations of RR intervals complexity estimated by the NCM.
Keywords :
electrocardiography; entropy; ECG Holter R; NCM; RR interval complexity; SampEn calculation; day-night variations; entropy surfaces; norm component matrix algorithm; sample entropy measurement; Algorithm design and analysis; Complexity theory; Correlation; Entropy; Oscillators; Physiology; Time series analysis;
Conference_Titel :
Cardiovascular Oscillations (ESGCO), 2014 8th Conference of the European Study Group on
Conference_Location :
Trento
DOI :
10.1109/ESGCO.2014.6847590
