Time-frequency parameters of heart-rate variability
Tóm tắt
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 dynamics of homeostatic cardiovascular control processes. As a first approach, the method was applied to describe changes in time-frequency parameters and in the characteristics of the oscillatory and irregular periods from supine to standing posture, under steady-state conditions in healthy subjects. The parameters and characteristics discriminated differentially between supine rest and orthostatic challenge. Furthermore, the method can be applied to other cardiovascular time series provided they are monocomponent.
Từ khóa
#Time frequency analysis #Heart rate variability #Fourier transforms #Visualization #Wavelet analysis #Cardiology #Process control #Fluctuations #Resonant frequency #Signal resolutionTài liệu tham khảo
10.1109/10.477700
10.1161/01.CIR.81.6.1803
flandrin, 1999, Time-Frequency/Time-Scale Analysis
10.1515/bmte.1984.29.s1.139
rompelman, 1980, the assessment of fluctuations in heart rate, The Study of Heart Rate Variability, 59
hyndman, 1975, a model of the cardiac pacemaker and its use in decoding the information content of cardiac intervals, Automedica, 1, 239
10.1016/0002-9149(89)90089-1
10.1016/S0165-1838(97)00011-8
wieling, 1992, non-invasive continuous recording of heart rate and blood pressure in the evaluation of neurocardiovascular control, Autonomic Failure— A Textbook of Clinical Disorders of the Autonomic Nervous System, 291
10.1007/s002130050105
10.1042/CS19980368
10.1161/01.HYP.16.4.414
10.1161/01.HYP.25.6.1276
10.1109/5.135376
cohen, 1995, Time-Frequency Analysis
van steenis, 0, Quantification of the dynamic behaviour over time of narrow-band components present in heart rate variability by means of the instantaneous amplitude and frequency
van steenis, 0, The instantaneous frequency of cardiovascular time series A comparison of methods
gabor, 1946, theory of communication, Proc Inst Elect Eng, 93, 429
ville, 1948, théorie et application de la notion de signal analytique, Cables et Transmissions, 2a, 61
10.1103/PhysRev.40.749
boashash, 1991, time-frequency signal analysis, Advances in Spectrum Analysis and Array Processing, 1, 418
martens, 1999, segmentation of ‘rhythmic’ and ‘noisy’ components of sleep eeg, heart rate and respiratory signals based on instantaneous amplitude, frequency, bandwidth and phase, 1st Joint BMES/EMBS Conf, 10.1109/IEMBS.1999.804113
sayers, 1980, signal analysis of heart-rate variability, The Study of Heart-Rate Variability, 27
10.1080/00140137308924484
martens, 1992, the fast time frequency transform (f.t.f.t.): a novel on-line approach to the instantaneous spectrum, Proc 14th Annu Int Conf IEEE Eng Med Biol Soc, 10.1109/IEMBS.1992.5761604
10.1109/10.8688
10.1109/TBME.1982.324972
10.1109/TBME.1968.4502576
tulen, 1994, spectral analysis of hemodynamics during infusions of epinephrine and norepinephrine in men, J Appl Phys, 76, 1914
saul, 1991, transfer function analysis of the circulation: unique insights into cardiovascular regulation, Amer J Phys, 261, 1231h
kitney, 1985, beat-by-beat interrelationships between heart rate, blood pressure and respiration, Beat-to-Beat Investigation of Cardiovascular Function, 146
10.1097/00004714-199604000-00006
akselrod, 1985, hemodynamic regulation: investigation by spectral analysis, Amer J Phys, 249, 867m
boashash, 1992, algorithms for time-frequency signal analysis, Time Frequency Signal Analysis— Methods and Applications
10.1109/TIT.1968.1054157
oppenheim, 1999, Discrete-Time Signal Processing
10.1109/SSAP.1992.246837
10.1109/ASSP.1989.28057
10.1109/TBME.1981.324853
bendat, 1986, Random Data Analysis and Measurements Procedures