Document Detail


Modeling autonomic regulation of cardiac function and heart rate variability in human endotoxemia.
MedLine Citation:
PMID:  21673075     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Heart rate variability (HRV), the quantification of beat-to-beat variability, has been studied as a potential prognostic marker in inflammatory diseases such as sepsis. HRV normally reflects significant levels of variability in homeostasis, which can be lost under stress. Much effort has been placed in interpreting HRV from the perspective of quantitatively understanding how stressors alter HRV dynamics, but the molecular and cellular mechanisms that give rise to both homeostatic HRV and changes in HRV have received less focus. Here, we develop a mathematical model of human endotoxemia that incorporates the oscillatory signals giving rise to HRV and their signal transduction to the heart. Connections between processes at the cellular, molecular, and neural levels are quantitatively linked to HRV. Rhythmic signals representing autonomic oscillations and circadian rhythms converge to modulate the pattern of heartbeats, and the effects of these oscillators are diminished in the acute endotoxemia response. Based on the semimechanistic model developed herein, homeostatic and acute stress responses of HRV are studied in terms of these oscillatory signals. Understanding the loss of HRV in endotoxemia serves as a step toward understanding changes in HRV observed clinically through translational applications of systems biology based on the relationship between biological processes and clinical outcomes.
Authors:
Jeremy D Scheff; Panteleimon D Mavroudis; Steven E Calvano; Stephen F Lowry; Ioannis P Androulakis
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2011-06-14
Journal Detail:
Title:  Physiological genomics     Volume:  43     ISSN:  1531-2267     ISO Abbreviation:  Physiol. Genomics     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-08-25     Completed Date:  2012-01-09     Revised Date:  2013-06-28    
Medline Journal Info:
Nlm Unique ID:  9815683     Medline TA:  Physiol Genomics     Country:  United States    
Other Details:
Languages:  eng     Pagination:  951-64     Citation Subset:  IM    
Affiliation:
Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08854, USA.
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MeSH Terms
Descriptor/Qualifier:
Endotoxemia / physiopathology*
Heart Rate / physiology*
Humans
Models, Theoretical*
Systems Biology
Grant Support
ID/Acronym/Agency:
GM-082974/GM/NIGMS NIH HHS; GM-34695/GM/NIGMS NIH HHS
Comments/Corrections

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