Heart rate dynamics assessed by different strategies of symbolization

Dirk Cysarz; Alberto Porta; Nicola Montano; Jürgen Kurths; Niels Wessel; Friedrich Edelhäuser; Peter Van Leeuwen

doi:10.1109/ESGCO.2014.6847514

Heart rate dynamics assessed by different strategies of symbolization

Dirk Cysarz, Alberto Porta, Nicola Montano, Jürgen Kurths, Niels Wessel, Friedrich Edelhäuser, Peter Van Leeuwen

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The analysis of symbolic dynamics applied to the RR interval series is able to retrieve information about dynamical properties. Three different strategies of symbolic transformations were investigated: (1) symbolization based on the deviation from the average, (2) symbolization based on equidistant levels between the minimum and maximum, (3) binary symbolization of the first derivative. Each method was applied to the RR interval series and its difference of 17 healthy subjects obtained during head-up tilt testing. Dynamical properties were assessed by the occurrence of short sequences ('words') of length 3. The occurrence of words was grouped according to variations of the symbols in each word (0, 1, and 2 variations). Linear regression analysis showed that the occurrence of these words reflects changes of heart rate dynamics during graded head-up tilt. Hence, very short symbolic sequences are able to track changes of the cardiac autonomic regulation.

Original language	English
Title of host publication	2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014
Publisher	IEEE Computer Society
Pages	51-52
Number of pages	2
ISBN (Print)	9781479939695
DOIs	https://doi.org/10.1109/ESGCO.2014.6847514
Publication status	Published - 2014
Event	2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014 - Trento, Italy Duration: May 25 2014 → May 28 2014

Other

Other	2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014
Country/Territory	Italy
City	Trento
Period	5/25/14 → 5/28/14

ASJC Scopus subject areas

Biomedical Engineering

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10.1109/ESGCO.2014.6847514

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Heart rate dynamics assessed by different strategies of symbolization. / Cysarz, Dirk; Porta, Alberto ; Montano, Nicola; Kurths, Jürgen; Wessel, Niels; Edelhäuser, Friedrich; Van Leeuwen, Peter.

2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014. IEEE Computer Society, 2014. p. 51-52 6847514.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Cysarz, D, Porta, A , Montano, N, Kurths, J, Wessel, N, Edelhäuser, F & Van Leeuwen, P 2014, Heart rate dynamics assessed by different strategies of symbolization. in 2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014., 6847514, IEEE Computer Society, pp. 51-52, 2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014, Trento, Italy, 5/25/14. https://doi.org/10.1109/ESGCO.2014.6847514

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abstract = "The analysis of symbolic dynamics applied to the RR interval series is able to retrieve information about dynamical properties. Three different strategies of symbolic transformations were investigated: (1) symbolization based on the deviation from the average, (2) symbolization based on equidistant levels between the minimum and maximum, (3) binary symbolization of the first derivative. Each method was applied to the RR interval series and its difference of 17 healthy subjects obtained during head-up tilt testing. Dynamical properties were assessed by the occurrence of short sequences ('words') of length 3. The occurrence of words was grouped according to variations of the symbols in each word (0, 1, and 2 variations). Linear regression analysis showed that the occurrence of these words reflects changes of heart rate dynamics during graded head-up tilt. Hence, very short symbolic sequences are able to track changes of the cardiac autonomic regulation.",

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AU - Porta, Alberto

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AU - Wessel, Niels

AU - Edelhäuser, Friedrich

AU - Van Leeuwen, Peter

PY - 2014

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AB - The analysis of symbolic dynamics applied to the RR interval series is able to retrieve information about dynamical properties. Three different strategies of symbolic transformations were investigated: (1) symbolization based on the deviation from the average, (2) symbolization based on equidistant levels between the minimum and maximum, (3) binary symbolization of the first derivative. Each method was applied to the RR interval series and its difference of 17 healthy subjects obtained during head-up tilt testing. Dynamical properties were assessed by the occurrence of short sequences ('words') of length 3. The occurrence of words was grouped according to variations of the symbols in each word (0, 1, and 2 variations). Linear regression analysis showed that the occurrence of these words reflects changes of heart rate dynamics during graded head-up tilt. Hence, very short symbolic sequences are able to track changes of the cardiac autonomic regulation.

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Heart rate dynamics assessed by different strategies of symbolization

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