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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Postolache, G. Rocha, I. Oliveira, M. Girao, P.S. Postolache, O.A. |
| Copyright Year | 2011 |
| Description | Author affiliation: Universidade Atlântica, Oeiras, Portugal (Postolache, G.) || Unidade de Sistema Nervoso Autónomo, Instituto de Medicina Molecular, Lisbon, Portugal (Rocha, I.; Oliveira, M.) || Octavian Adrian Postolache, Instituto Superior Técnico, Instituto de Telecomunicações, Lisbon, Portugal (Girao, P.S.) |
| Abstract | The purpose of this work is to discuss the ability of wavelet analysis and cross-spectral algorithm to follow up the short-term cardiovascular function changes during cardiac arrhythmia. It was analyzed 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) heart rate variability (HRV) and blood pressure variability (BPV) as a LF power and HF power in frequency and time frequency domain. The analysis was performed on blood pressure and electrocardiogram signals from one rabbit anaesthetized, paralyzed and mechanically ventilated with self-terminating atrial and ventricular fibrillation after 7 minutes of cardiac arrhythmia. Arrhythmia was preceded by a) decreased coherence; b) increase in fluctuations of phase between signals; c) increased spectral energy associated with respiratory frequency in blood pressure signal; d) increased sympathetic outflow to the heart and e) decreased HRV. Cardiac arrhythmia was characterized mainly by increased LF power in blood pressure and cardiac signal. During self-termination of dysrhythmia a larger increased in total BPV and HRV was recorded. These results suggest that important information about both neuronal cardio-circulatory control and risk for spontaneous arrhythmia might be provided by combined analysis of frequency, phase, time-frequency analysis of blood pressure and cardiac oscillation. |
| Starting Page | 525 |
| Ending Page | 531 |
| File Size | 783241 |
| Page Count | 7 |
| File Format | |
| ISBN | 9781424493364 |
| e-ISBN | 9781424493388 |
| DOI | 10.1109/MeMeA.2011.5966760 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-05-30 |
| Publisher Place | Italy |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Coherence Blood pressure Time frequency analysis Resonant frequency Heart rate variability Continuous wavelet transforms blood pressure and heart rate variability cross-spectral algorithm wavelet analysis arrhythmia |
| Content Type | Text |
| Resource Type | Article |
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