Synchronization between arterial blood pressure and cerebral oxyhaemoglobin concentration investigated by wavelet cross-correlation.

@article{citeulike:1699838, abstract = {Wavelet cross-correlation (WCC) is used to analyse the relationship between low-frequency oscillations in near-infrared spectroscopy (NIRS) measured cerebral oxyhaemoglobin (O(2)Hb) 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 O(2)Hb 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.}, address = {Department of Engineering Science, University of Oxford, Oxford, UK. abr@robots.ox.ac.uk}, author = {Rowley, A. B. and Payne, S. J. and Tachtsidis, I. and Ebden, M. J. and Whiteley, J. P. and Gavaghan, D. J. and Tarassenko, L. and Smith, M. and Elwell, C. E. and Delpy, D. T. }, citeulike-article-id = {1699838}, issn = {0967-3334}, journal = {Physiol Meas}, month = {February}, number = {2}, pages = {161--173}, posted-at = {2007-09-27 11:10:16}, priority = {2}, title = {Synchronization between arterial blood pressure and cerebral oxyhaemoglobin concentration investigated by wavelet cross-correlation.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/17237588}, volume = {28}, year = {2007} }

TY - JOUR ID - citeulike:1699838 L3 - citeulike-article-id:1699838 TI - Synchronization between arterial blood pressure and cerebral oxyhaemoglobin concentration investigated by wavelet cross-correlation. JF - Physiol Meas VL - 28 IS - 2 SP - 161 EP - 173 AD - Department of Engineering Science, University of Oxford, Oxford, UK. abr@robots.ox.ac.uk SN - 0967-3334 N2 - Wavelet cross-correlation (WCC) is used to analyse the relationship between low-frequency oscillations in near-infrared spectroscopy (NIRS) measured cerebral oxyhaemoglobin (O(2)Hb) 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 O(2)Hb 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. AU - Rowley, AB AU - Payne, SJ AU - Tachtsidis, I AU - Ebden, MJ AU - Whiteley, JP AU - Gavaghan, DJ AU - Tarassenko, L AU - Smith, M AU - Elwell, CE AU - Delpy, DT PY - 2007/02// UR - http://view.ncbi.nlm.nih.gov/pubmed/17237588 ER -