Characterization of multivariate cardiovascular dynamics during head-up tilting based on Kullback-Leibler divergence

Mitsuyuki Nakao, Masakatsu Sawada, Yukio Matsushita, Norihiro Katayama, Mitsuaki Yamamoto, Masanori Munakata

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2180-2183
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume5
Publication statusPublished - 1997 Dec 1
EventProceedings of the 1997 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Chicago, IL, USA
Duration: 1997 Oct 301997 Nov 2

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

Fingerprint Dive into the research topics of 'Characterization of multivariate cardiovascular dynamics during head-up tilting based on Kullback-Leibler divergence'. Together they form a unique fingerprint.

  • Cite this