Decomposition of heartbeat time series: scaling analysis of the sign
sequence

Ashkenazy, Y.  Ivanov, P.C.  Havlin, S.  Peng, C.K.  Yamamoto, Y.
Goldberger, A.L.  Stanley, H.E.


This paper appears in: Computers in Cardiology 2000
Publication Date: 2000
On page(s): 139-142
Meeting Date: 09/24/2000 - 09/27/2000
Location: Cambridge, MA, USA
ISBN: 0-7803-6557-7
References Cited: 10
INSPEC Accession Number: 6827026
DOI: 10.1109/CIC.2000.898475
Posted online: 2002-08-06 23:25:52.0

Abstract 
The cardiac interbeat (RR) increment time series can be
decomposed into two sub-sequences: a magnitude series and a sign
series. The authors show that the sign sequence, a simple binary
representation of the original RR series, retains fundamental scaling
properties of the original series, is robust with respect to outliers,
and may provide useful information about neuroautonomic control
mechanisms