Artery Research

Volume 6, Issue 4, December 2012, Pages 163 - 163

P2.01 REPRODUCIBILITY OF CAROTID-TO-FEMORAL PULSE WAVE VELOCITY MEASUREMENT: QUANTITATIVE EFFECTS OF DISTANCE AND TRANSIT TIME ASSESSMENT

Authors
F. Battista, G. Pucci, G. Schillaci
University of Perugia at Terni, Terni, Italy
Available Online 17 November 2012.
DOI
10.1016/j.artres.2012.09.082How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Background: Carotid-femoral pulse wave velocity (PWV) is calculated on the basis of body surface distance (determined by either direct or indirect paths) and the corresponding transit time. The impact of distance vs time measurement on PWV reproducibility has not been quantified.

Methods: In 34 volunteers (age 47±19 years), carotid-femoral distance and transit time were measured twice by each of 2 trained observers, 2 hours apart, using a tape and a caliper. Two commonly used estimates of the travelled distance were calculated, namely "subtracted" (suprasternal notch to femoral artery minus suprasternal notch to carotid artery) and "direct" distance (carotid to femoral artery, multiplied by 0.8). Transit time was measured by high-fidelity tonometry (SphygmoCor, average of 3 readings for each of the 2 sessions). Variability was expressed as interobserver coefficient of variation (CV) and intra-class correlation (ICC).

Results: The CV was lowest for transit time (3.0%; interobserver difference ± SD, 0.0±1.8 ms), highest for subtracted distance (6.8%; 3.1±29 mm), and intermediate for direct distance (4.2%; 12.5±20 mm). The resulting interobserver differences in PWV were +0.0±0.2 m/s, +0.0±0.5 m/s, and +0.2±0.3 m/s, respectively. ICC was 0.98 for transit time (95% confidence interval [CI], 0.97–0.99), 0.73 for subtracted distance (95% CI, 0.53–0.86), and 0.81 for direct distance (95% CI, 0.66–0.90).

Conclusion. Interobserver variability of aortic PWV depends more on the measurement of body surface distance than on transit time. Estimates of the distance based on direct paths may generate a lower interobserver variability than those resulting from the combination of 2 paths ("subtracted" distance).

Journal
Artery Research
Volume-Issue
6 - 4
Pages
163 - 163
Publication Date
2012/11/17
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2012.09.082How 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  - F. Battista
AU  - G. Pucci
AU  - G. Schillaci
PY  - 2012
DA  - 2012/11/17
TI  - P2.01 REPRODUCIBILITY OF CAROTID-TO-FEMORAL PULSE WAVE VELOCITY MEASUREMENT: QUANTITATIVE EFFECTS OF DISTANCE AND TRANSIT TIME ASSESSMENT
JO  - Artery Research
SP  - 163
EP  - 163
VL  - 6
IS  - 4
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2012.09.082
DO  - 10.1016/j.artres.2012.09.082
ID  - Battista2012
ER  -