Artery Research

Volume 1, Issue S1, June 2006, Pages S44 - S44

P.073 INTEGRATED ARTERIAL SYSTEM ANALYSIS IN A POPULATION OF HEALTHY MIDDLE-AGED MEN AND WOMEN: AUGMENTATION INDEX VERSUS WAVE REFLECTION INDICES

Authors
P. Segers*1, E.R. Rietzschel2, M.L. De Buyzere2, S.J. Vermeersch1, D. De Bacquer2, L.M. Van Bortel2, G. De Backer2, T.C. Gillebert2, P.R. Verdonck1
1Ghent University, Gent, Belgium,
2Ghent University Hospital, Gent, Belgium
Available Online 13 June 2007.
DOI
10.1016/S1872-9312(07)70096-0How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Background: Age-induced alterations in arterial impedance and wave reflection contribute to elevated systolic and pulse pressure. Surrogate indices such as the augmentation index (AIx), suggest increased susceptibility for wave reflection in women.

Methods and Results: Carotid pressure and central flow waveforms were acquired non-invasively in 2132 apparently healthy subjects (1093 F/1039 M), aged between 35 and 55 at inclusion (a subgroup of the ‘Asklepios’ population). Input impedance, reflection coefficient |Γ|1 and the ratio of backward-to-forward pressure amplitude, Pb/Pf, both direct measures of wave reflection, were derived. AIx was assessed using (automated) identification of characteristic points on the pressure waveform, and the effective length of the arterial tree, Leff, was calculated from the timing of the reflected wave and pulse wave velocity. In addition, we calculated AIx* and Leff * where information from pressure and flow was used to obtain the timing of the reflected wave (through wave separation analysis). Both |Γ|1 (from 0.4143±0.0033 at age 38 to 0.4618±0.0048 at 54; mean±SEM) and Pb/Pf (0.4491±0.0033 to 0.5038±0.0044) increased with age (P < 0.001) without gender differences. AIx also increased with age, but was persistently higher in women (P < 0.001), while Leff spuriously increased with age. Interestingly, while still increasing with age, there was virtually no gender difference in AIx* and Leff * demonstrated the anticipated shift of reflection sites towards the heart.

Conclusion: With ageing, wave reflection increases to a similar degree in middle-aged healthy men and women. Analysis of wave reflection, using a modified AIx*, appears to yield more consistent results than conventional AIx.

Journal
Artery Research
Volume-Issue
1 - S1
Pages
S44 - S44
Publication Date
2007/06/13
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/S1872-9312(07)70096-0How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - JOUR
AU  - P. Segers*
AU  - E.R. Rietzschel
AU  - M.L. De Buyzere
AU  - S.J. Vermeersch
AU  - D. De Bacquer
AU  - L.M. Van Bortel
AU  - G. De Backer
AU  - T.C. Gillebert
AU  - P.R. Verdonck
PY  - 2007
DA  - 2007/06/13
TI  - P.073 INTEGRATED ARTERIAL SYSTEM ANALYSIS IN A POPULATION OF HEALTHY MIDDLE-AGED MEN AND WOMEN: AUGMENTATION INDEX VERSUS WAVE REFLECTION INDICES
JO  - Artery Research
SP  - S44
EP  - S44
VL  - 1
IS  - S1
SN  - 1876-4401
UR  - https://doi.org/10.1016/S1872-9312(07)70096-0
DO  - 10.1016/S1872-9312(07)70096-0
ID  - Segers*2007
ER  -