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Acute increase of complexity in the neurocardiovascular dynamics following carotid stenting.
MedLine Citation:
PMID:  20569227     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
OBJECTIVE: Percutaneous carotid angioplasty and stenting (CAS) has been used to improve cerebral circulation and autoregulation. However, whether CAS ameliorates the autonomic regulatory dynamics remains unclear. This prospective study examines the neurocardiovascular dynamics following carotid stenting.
METHODS: Thirty minutes electrocardiograms were recorded at three different time points (pre-operative, 1-h post-operative, 1-day post-operative) on twelve male patients (mean age 70.8 ± 9.6 years) receiving unilateral primary CAS. The HR data were analyzed by the conventional heart rate variability (HRV) and the multiscale entropy (MSE) methods; the former associates with autonomic activities and the latter quantifies the regulatory complexity of heart beat intervals. Loss of complexity at multiple scales has been associated with decoupled regulatory network in vivo.
RESULTS: Conventional HRV indices showed no difference after CAS. Complexity indices increased significantly on scales 2-8 at 1-h and on scales 2-3 1-day post-treatment. The lower scale MSE (1-5) correlated with the frequency components of conventional HRV indices. The increased complexity could imply a restoration of the neurocardiovascular dynamics on the path to a healthier state.
CONCLUSIONS: Primary CAS can induce a recovery in the neurocardiovascular regulatory dynamics in patients with high-grade carotid stenosis.
Authors:
H-K Yuan; C Lin; P-H Tsai; F-C Chang; K-P Lin; H-H Hu; M-C Su; M-T Lo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta neurologica Scandinavica     Volume:  123     ISSN:  1600-0404     ISO Abbreviation:  Acta Neurol. Scand.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-01-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370336     Medline TA:  Acta Neurol Scand     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  187-92     Citation Subset:  IM    
Copyright Information:
© 2010 John Wiley & Sons A/S.
Affiliation:
Department of Biomedical Engineering, Duke University, Durham, NC, USA.
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