TY - JOUR
T1 - On excursion increments in heartbeat dynamics
AU - Guzmán-Vargas, L.
AU - Reyes-Ramírez, I.
AU - Hernández-Pérez, R.
N1 - Funding Information:
We thank F. Angulo-Brown for fruitful comments and suggestions. This work was partially supported by COFAA-IPN, EDI-IPN and Conacyt (México).
PY - 2013
Y1 - 2013
N2 - We study correlation properties of excursion increments of heartbeat time series from healthy subjects and heart failure patients. We construct the excursion time based on the original heartbeat time series, representing the time employed by the walker to return to the local mean value. Next, the detrended fluctuation analysis and the fractal dimension method are applied to the magnitude and sign of the increments in the time excursions between successive excursions for the mentioned groups. Our results show that for magnitude series of excursion increments both groups display long-range correlations with similar correlation exponents, indicating that large (small) increments (decrements) are more likely to be followed by large (small) increments (decrements). For sign sequences and for both groups, we find that increments are short-range anti-correlated, which is noticeable under heart failure conditions.
AB - We study correlation properties of excursion increments of heartbeat time series from healthy subjects and heart failure patients. We construct the excursion time based on the original heartbeat time series, representing the time employed by the walker to return to the local mean value. Next, the detrended fluctuation analysis and the fractal dimension method are applied to the magnitude and sign of the increments in the time excursions between successive excursions for the mentioned groups. Our results show that for magnitude series of excursion increments both groups display long-range correlations with similar correlation exponents, indicating that large (small) increments (decrements) are more likely to be followed by large (small) increments (decrements). For sign sequences and for both groups, we find that increments are short-range anti-correlated, which is noticeable under heart failure conditions.
UR - http://www.scopus.com/inward/record.url?scp=84876391507&partnerID=8YFLogxK
U2 - 10.1016/j.chaos.2013.03.004
DO - 10.1016/j.chaos.2013.03.004
M3 - Artículo
SN - 0960-0779
VL - 52
SP - 1
EP - 7
JO - Chaos, Solitons and Fractals
JF - Chaos, Solitons and Fractals
IS - 1
ER -