TY - JOUR
T1 - Scale invariance in the nonstationarity of human heart rate
AU - Bernaola-Galván, Pedro
AU - Ivanov, Flamen Ch
AU - Nunes Amaral, Luís A.
AU - Stanley, H. Eugene
PY - 2001/10/2
Y1 - 2001/10/2
N2 - We introduce a segmentation algorithm to probe the temporal organization of heterogeneities in human heartbeat interval time series. We find that the lengths of segments with different local mean heart rates follow a power-law distribution and show that this scale-invariant structure is not a simple consequence of the long-range correlations present in the data. The differences in mean heart rates between consecutive segments display a common functional form, but with different parameters for healthy individuals and for heart-failure patients. These findings suggest that there is relevant physiological information hidden in the heterogeneities of the heartbeat time series.
AB - We introduce a segmentation algorithm to probe the temporal organization of heterogeneities in human heartbeat interval time series. We find that the lengths of segments with different local mean heart rates follow a power-law distribution and show that this scale-invariant structure is not a simple consequence of the long-range correlations present in the data. The differences in mean heart rates between consecutive segments display a common functional form, but with different parameters for healthy individuals and for heart-failure patients. These findings suggest that there is relevant physiological information hidden in the heterogeneities of the heartbeat time series.
UR - http://www.scopus.com/inward/record.url?scp=37649029852&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=37649029852&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.87.168105
DO - 10.1103/PhysRevLett.87.168105
M3 - Article
C2 - 11690251
AN - SCOPUS:37649029852
SN - 0031-9007
VL - 87
JO - Physical review letters
JF - Physical review letters
IS - 16
ER -
