Time-frequency parameters of heart-rate variability.

We have evaluated a new method to compute time-frequency parameters from cardiovascular time series. Apart from calculating the IA and the IF, characteristics of the oscillatory and irregular periods can be quantified that may be relevant to further unravel the situational- and state-dependent dynam...

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Publicat a:	IEEE Engineering in medicine and biology magazine 21, 4 (2002).
Autor principal:	Van Steenis, H.G
Format:	Article
Idioma:	English
Matèries:	ECG. FIR filter. Fourier transform. Hilbert transform. Nyquist frequency. R-waves. Wigner-Ville distribution. Band-limited signals. Bandpass filtering. Cardiovascular time series. Decimation factor. Heart-rate variability. Homeostatic cardiovascular control processes. Instantaneous amplitude. Instantaneous frequency. Irregular periods. Orthostatic challenge. Oscillatory periods. Standing posture. State-dependent dynamics. Steady-state conditions. Supine posture. Time-frequency parameters.