https://scholars.lib.ntu.edu.tw/handle/123456789/611857
標題: | Synchronization between arterial blood pressure and cerebral oxyhaemoglobin concentration investigated by wavelet cross-correlation | 作者: | Rowley A.B. Payne S.J. Tachtsidis I. Ebden M.J. Whiteley J.P. Gavaghan D.J. Tarassenko L. Smith M. Elwell C.E. Delpy D.T. STEPHEN JOHN PAYNE |
關鍵字: | Blood pressure;Infrared devices;Time series analysis;Wavelet analysis;Arterial blood pressure;Cerebral circulation;Frequency oscillations;Lower frequencies;Mean arterial blood pressures;Posture change;Spontaneous oscillations;Sympathetic stimulation;Time-frequency Analysis;Wavelet cross-correlation;Near infrared spectroscopy;adult;aged;article;autonomic dysfunction;autoregulation;body posture;brain cortex;controlled study;correlation analysis;dynamics;hemoglobin determination;human;mean arterial pressure;near infrared spectroscopy;oscillation;priority journal;statistical significance;waveform;algorithm;autonomic neuropathy;blood pressure;brain level;female;homeostasis;male;metabolism;middle aged;pathophysiology;physiology;plethysmography;statistical analysis;supine position;tilt table test;oxyhemoglobin;Adult;Aged;Algorithms;Autonomic Nervous System Diseases;Blood Pressure;Brain Chemistry;Data Interpretation, Statistical;Female;Homeostasis;Humans;Male;Middle Aged;Oxyhemoglobins;Plethysmography;Spectroscopy, Near-Infrared;Supine Position;Tilt-Table Test | 公開日期: | 2007 | 卷: | 28 | 期: | 2 | 起(迄)頁: | 161-173 | 來源出版物: | Physiological Measurement | 摘要: | Wavelet cross-correlation (WCC) is used to analyse the relationship between low-frequency oscillations in near-infrared spectroscopy (NIRS) measured cerebral oxyhaemoglobin (O2Hb) and mean arterial blood pressure (MAP) in patients suffering from autonomic failure and age-matched controls. Statistically significant differences are found in the wavelet scale of maximum cross-correlation upon posture change in patients, but not in controls. We propose that WCC analysis of the relationship between O2Hb and MAP provides a useful method of investigating the dynamics of cerebral autoregulation using the spontaneous low-frequency oscillations that are typically observed in both variables without having to make the assumption of stationarity of the time series. It is suggested that for a short-duration clinical test previous transfer-function-based approaches to analyse this relationship may suffer due to the inherent nonstationarity of low-frequency oscillations that are observed in the resting brain. ? 2007 IOP Publishing Ltd. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-33947722691&doi=10.1088%2f0967-3334%2f28%2f2%2f005&partnerID=40&md5=f7635a62b9194809103b4704d024738d https://scholars.lib.ntu.edu.tw/handle/123456789/611857 |
DOI: | 10.1088/0967-3334/28/2/005 |
顯示於: | 應用力學研究所 |
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