TY - JOUR
T1 - Characterization of multivariate cardiovascular dynamics during head-up tilting based on Kullback-Leibler divergence
AU - Nakao, Mitsuyuki
AU - Sawada, Masakatsu
AU - Matsushita, Yukio
AU - Katayama, Norihiro
AU - Yamamoto, Mitsuaki
AU - Munakata, Masanori
PY - 1997/12/1
Y1 - 1997/12/1
N2 - In this paper, multivariate cardiovascular dynamics during head-up tilting is investigated as an augmenting process of sympathetic activities. Characteristically in spectral profiles, a respiration-induced rhythm in each variables is reduced, and alternatively the Mayer wave components in blood pressure and heart rate signals become distinct, as a tilting angle increases. These spectral features are shown to be originated from closed-loop impulse responses which show the longer lasting response from HR to HR and the delayed response from HR to BP in contrast with those from BP to HR and from BP to BP which exhibit no systematic changes. The newly introduced Kullback-Leibler divergence consistently differentiates tilting-angle-dependent multivariate cardiovascular dynamics. The results here suggest that the Kullback-Leibler divergence could provide synthetic characterization of the autonomic regulations.
AB - In this paper, multivariate cardiovascular dynamics during head-up tilting is investigated as an augmenting process of sympathetic activities. Characteristically in spectral profiles, a respiration-induced rhythm in each variables is reduced, and alternatively the Mayer wave components in blood pressure and heart rate signals become distinct, as a tilting angle increases. These spectral features are shown to be originated from closed-loop impulse responses which show the longer lasting response from HR to HR and the delayed response from HR to BP in contrast with those from BP to HR and from BP to BP which exhibit no systematic changes. The newly introduced Kullback-Leibler divergence consistently differentiates tilting-angle-dependent multivariate cardiovascular dynamics. The results here suggest that the Kullback-Leibler divergence could provide synthetic characterization of the autonomic regulations.
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M3 - Conference article
AN - SCOPUS:0031294326
SN - 1557-170X
VL - 5
SP - 2180
EP - 2183
JO - Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference
JF - Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference
T2 - Proceedings of the 1997 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Y2 - 30 October 1997 through 2 November 1997
ER -