NDLI: Changes in instantaneous complex dynamics during exercise in Chronic Mountain Sickness

Content Provider	IEEE Xplore Digital Library
Author	Valenza, Gaetano Faita, Francesco Pratali, Lorenza Vanello, Nicola Lanata, Antonio Barbieri, Riccardo Scilingo, Enzo Pasquale
Copyright Year	2015
Description	Author affiliation: Institute of Clinical Physiology, Italian National Research Council, Pisa, Italy (Faita, Francesco; Pratali, Lorenza) \|\| Harvard Medical School-Massachusetts General Hospital, Boston, USA (Barbieri, Riccardo) \|\| Department of Information Engineering & Research Centre E. Piaggio, University of Pisa, Italy (Valenza, Gaetano; Vanello, Nicola; Lanata, Antonio; Scilingo, Enzo Pasquale)
Abstract	The combination of persistent polycythemia with decreased physical and cognitive performances while living in high-altitude is defined as ‘Chronic Mountain Sickness’ (CMS). To date, the role of the autonomic nervous system in CMS is still unknown. In this study, we analyze instantaneous tracking of cardiovascular complexity in order to increase the knowledge on CMS physio-pathology. To this extent, we processed heartbeat dynamics gathered from 13 CMS males and 7 high-altitude male dwellers, taken as healthy controls (HC), during semi-supine bicycle tasks performed at 25W, 50W, and 100W, along with a recovery session. Instantaneous Dominant Lyapunov exponents (IDLE), as estimated through point-process nonlinear models with Laguerre and Volterra expansions, were evaluated from such series. Results showed that instantaneous heartbeat complex dynamics was significantly altered in CMS. In particular, IDLE increases were associated to CMS, with respect to HC, during the 25W and 50W exercise sessions (p < 0.01). Conversely, no statistical differences were found when analyzing the 100W session, and first recovery after exercise.
Starting Page	997
Ending Page	1000
File Size	906574
Page Count	4
File Format	PDF
ISBN	9781509006854
ISSN	2325887X
e-ISBN	9781509006847
DOI	10.1109/CIC.2015.7411081
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-06
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Creative Commons Attribution License 2.5 (CCAL)
Subject Keyword	Heart rate variability Physiology Complexity theory Diseases Heart beat Bicycles
Content Type	Text
Resource Type	Article
Subject	Computer Science Cardiology and Cardiovascular Medicine

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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