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|Title:||Joint symbolic dynamic analysis of cardiorespiratory interactions in patients on weaning trials|
|Citation:||2005 27th Annual International Conference of the IEEE Engineering in Medicine and Biology Society : Shanghai, China, 31 August - 03 September 2005 / IEEE, pp. 4576-4579.|
|Publisher:||IEEE - Institute of Electrical and Electronics Engineers|
|Series/Report no.:||PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY|
|Conference Name:||IEEE Engineering in Medicine and Biology Society. Conference (27th : 2005 : Shanghai, China)|
|Caminal, P. Giraldo, B. Zabaleta, H. Vallverdu, M. Benito, S. Ballesteros, D. Lopez-Rodriguez, L. Esteban, A. Baumert, M. Voss, A.|
|Abstract:||Assessing autonomic control provides information about patho-physiological imbalances. Measures of variability of the cardiac interbeat duration RR(n) and the variability of the breath duration T Tot(n) are sensitive to those changes. The interactions between RR(n) and TTot(n) are complex and strongly non-linear. A study of joint symbolic dynamics is presented as a new short-term non-linear analysis method to investigate these interactions in patients on weaning trials. 78 patients from mechanical ventilation are studied: Group A (patients that failed to maintain spontaneous breathing and were reconnected) and Group B (patients with successful trials). Using the concept of joint symbolic dynamics, cardiac and respiratory changes were transformed into a word series, and the probability of occurrence of each word type was calculated and compared between both groups. Significant differences were found in 13 words, and the most significant pn(wc010, r010): 0.0041 plusmn 0.0036 (group A) against 0.0012 plusmn 0.0024 (group B), p-value = 0.00001. The number of seldom occurring word types (forbidden words) also presents significant differences fwcr: 6.9 plusmn 6.6 against 13.5 plusmn 5.3, p-value = 0.00004. Joint symbolic dynamics provides an efficient non-linear representation of cardiorespiratory interactions that offers simple physiological interpretations|
|Description:||© Copyright 2005 IEEE|
|Appears in Collections:||Electrical and Electronic Engineering publications|
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