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New insight into arrhythmia onset using HRV and BPV analysis

Postolache, G. ; Girão, P.M. ; Postolache, O.

New insight into arrhythmia onset using HRV and BPV analysis, Proc International Conf. of the IEEE Engineering in Medicine and Biology Society - EMBC, Boston, United States, Vol. 1, pp. 2691 - 2694, September, 2011.

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In this paper Heart Rate Variability (HRV) and Blood
Pressure Variability (BPV) were analyzed before the onset of cardiac arrhythmia in order to derive markers for short-term forecasting. The (a) coherence between systolic blood pressure (SBP) and cardiac
oscillations in low-frequency (LF) and high-frequency (HF) band; (b)
fluctuations of phase; (c) HRV and BPV as a LF power and HF power
in frequency and time-frequency domain; (d) transfer function analysis
of cardiovascular signals were analyzed. Arrhythmia was preceded by:
a) lower coherence; b) increase in fluctuations of phase between
signals; c) higher spectral energy associated with respiratory frequency
in blood pressure signal; d) raise of sympathetic outflow to the heart; e)
decreased HRV. Cardiac arrhythmia was characterized mainly by an
increase in LF power of blood pressure, cardiac signal and transfer
function. During self-termination of arrhythmia a larger increased in
total BPV and HRV was recorded. These results suggest that important
information about both neuronal cardiovascular control and risk for
spontaneous arrhythmia can be provided by combined analysis of
frequency, phase, and time-frequency analysis of blood pressure and
cardiac oscillation.