NDLI: Arterial wall diameter and viscoelasticity variability

Content Provider	IEEE Xplore Digital Library
Author	Gamero, L.G. Armentano, R.L. Levenson, J.
Copyright Year	2002
Description	Author affiliation: Favaloro Univ., Buenos Aires, Argentina (Gamero, L.G.; Armentano, R.L.)
Abstract	The aim of this study was to evaluate and characterize arterial diameter and arterial wall viscoelastic variability. An animal study was performed on seven sheep instrumented in the brachycephalic artery. ECG, arterial diameter and pressure waveforms were simultaneously measured. Four different hemodynamic conditions were considered: 1) under anesthesia, 2) conscious steady state, 3) vascular smooth muscle (VSM) activation and 4) VSM relaxation. A system modeling identification approach was applied in order to estimate viscoelastic indexes. The linear autoregressive with exogenous input model (ARX) was applied to the single beat pressure-diameter data to assess the arterial system dynamics. The elastic and viscous indexes were derived from the identified ARX model. Arterial pressure and diameter, heart rate and viscoelastic indexes variability analysis were performed in the time and frequency domains. While systolic pressure and arterial diameter oscillation show a similar pattern to heart rate at all frequency bands in control condition, wall viscosity variability does not match with these parameters (p<0.05). Compared with control condition, arterial diameter variability was lower during anesthesia and higher during VSM relaxation (p<0.05). The elastic index variability was lower during anesthesia and VSM relaxation and higher during VSM activation. The different behavior of arterial wall viscoelasticity suggests that intrinsic mechanisms related with vascular tone and vasomotion might be involved in the oscillatory pattern of the arterial wall.
Starting Page	513
Ending Page	516
File Size	374955
Page Count	4
File Format	PDF
ISBN	0780377354
ISSN	02766547
DOI	10.1109/CIC.2002.1166822
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arteries Viscosity Elasticity Anesthesia Heart rate Animals Instruments Electrocardiography Pressure measurement Hemodynamics
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in