Directionality in cardiovascular variability interactions during head-down tilt test

Alberto Porta, Andrea Marchi, Vlasta Bari, Aparecida M. Catai, Stefano Guzzetti, Ferdinando Raimondi, Riccardo Colombo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A nonlinear model-free Granger causality approach was exploited to quantify the strength of the causal relation along cardiac baroreflex and cardiopulmonary pathway from spontaneous cardiovascular variabilities during head-down tilt (HDT). The analysis was completed through the assessment of traditional time and frequency domain parameters and cardiac baroreflex sensitivity. We found that, while respiratory sinus arrhythmia augmented, the power of the systolic arterial pressure variability in the low frequency band (i.e. from 0.04 to 0.15 Hz) decreased and cardiac baroreflex sensitivity increased, the strength of the causal relation along cardiac baroreflex and cardiopulmonary pathway remained constant. We conclude that, despite cardiopulmonary stimulation and sympathetic inhibition induced by HDT, neither cardiac baroreflex nor cardiopulmonary pathway took prevalence in governing heart period changes during HDT.

Original languageEnglish
Title of host publication2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages6008-6011
Number of pages4
ISBN (Print)9781424479290
DOIs
Publication statusPublished - Nov 2 2014
Event2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2014 - Chicago, United States
Duration: Aug 26 2014Aug 30 2014

Other

Other2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2014
CountryUnited States
CityChicago
Period8/26/148/30/14

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ASJC Scopus subject areas

  • Health Informatics
  • Computer Science Applications
  • Biomedical Engineering

Cite this

Porta, A., Marchi, A., Bari, V., Catai, A. M., Guzzetti, S., Raimondi, F., & Colombo, R. (2014). Directionality in cardiovascular variability interactions during head-down tilt test. In 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2014 (pp. 6008-6011). [6944998] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EMBC.2014.6944998