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.
|ジャーナル||Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings|
|出版ステータス||Published - 1997 12 1|
|イベント||Proceedings of the 1997 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Chicago, IL, USA|
継続期間: 1997 10 30 → 1997 11 2
ASJC Scopus subject areas
- コンピュータ ビジョンおよびパターン認識