Document Detail

Characterization of interdependency between intracranial pressure and heart variability signals: a causal spectral measure and a generalized synchronization measure.
MedLine Citation:
PMID:  17694861     Owner:  NLM     Status:  MEDLINE    
Causal coherence and generalized synchronization (GS) index were extracted from beat-to-beat mean intracranial pressure (ICP) and intervals between consecutive normal sinus heart beats (RR interval) that were recorded from 12 patients undergoing normal pressure hydrocephalus diagnosis. Data were organized into two groups including an ICP B-Wave group and a baseline control group. Maximal classic coherence (CC) between ICP and RR interval within [0.04, 0.15] Hz was found to be significantly greater than zero for both B-Wave and control groups with B-Wave CC greater than that of the baseline group. Causal coherence analysis further revealed that feedforward coherence due to RR interval's effect on ICP always exists for both B-Wave and baseline ICP state and no significant difference exists between two groups. On the other hand, feedback coherence from ICP to RR interval was enhanced during the occurrence of B-Wave. This finding regarding the enhanced directional, from ICP to RR interval, coupling between ICP and RR interval was also confirmed by a modified GS measure.
Xiao Hu; Valeriy Nenov; Paul Vespa; Marvin Bergsneider
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  IEEE transactions on bio-medical engineering     Volume:  54     ISSN:  0018-9294     ISO Abbreviation:  IEEE Trans Biomed Eng     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-08-14     Completed Date:  2007-09-11     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  0012737     Medline TA:  IEEE Trans Biomed Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1407-17     Citation Subset:  IM    
Brain Monitoring and Modelling Laboratory, Division of Neurosurgery, University of California, Los Angeles, CA 90034, USA.
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MeSH Terms
Computer Simulation
Diagnosis, Computer-Assisted / methods*
Heart Rate*
Hydrocephalus, Normal Pressure / diagnosis*,  physiopathology*
Intracranial Pressure*
Models, Biological*
Statistics as Topic
Grant Support
R01 NS054881/NS/NINDS NIH HHS; R21 NS055045-01A1/NS/NINDS NIH HHS; R21 NS055998/NS/NINDS NIH HHS; R21 NS055998-01A1/NS/NINDS NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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