System dynamics of active and passive postural changes: Insights from principal dynamic modes analysis of baroreflex loop
Computers in Biology and Medicine, ISSN: 0010-4825, Vol: 100, Page: 27-35
2018
- 6Citations
- 18Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations6
- Citation Indexes6
- CrossRef3
- Captures18
- Readers18
- 18
Article Description
The baroreflex being a key modulator of cardiovascular control ensures adequate blood pressure regulation under orthostatic stress which otherwise may cause severe hypotension. Contrary to conventional baroreflex sensitivity indices derived across a-priori traditional frequency bands, the present study is aimed at proposing new indices for the assessment of baroreflex drive which follows active (supine to stand-up) and passive (supine to head-up tilt) postural changes. To achieve this, a novel system identification approach of principal dynamic modes (PDM) was utilized to extract data-adaptive frequency components of closed-loop interactions between beat-to-beat interval and systolic blood pressure recorded from 10 healthy humans. We observed that the gain of low-pass global PDM of cardiac arm (:feedback reflex loop, mediated by pressure sensors to adjust heart rate in response to arterial blood pressure), and 0.2 Hz global PDM of mechanical arm (:feed-forward pathways, originating changes in arterial blood pressure in response to heart rate variations) may function as potential markers to distinguish active and passive orthostatic tests in healthy subjects.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0010482518301689; http://dx.doi.org/10.1016/j.compbiomed.2018.06.022; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85049067480&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/29975851; https://linkinghub.elsevier.com/retrieve/pii/S0010482518301689; https://dx.doi.org/10.1016/j.compbiomed.2018.06.022
Elsevier BV
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