Comparison of aortic pulse wave velocity measured by three techniques: Complior, SphygmoCor and Arteriograph
Marek W Rajzer1, Wiktoria Wojciechowska, Marek Klocek
11st Department of Cardiology and Hypertension, Institute of Cardiology, Jagiellonian University Medical College, Krakow, Poland. rajzer37@interia.pl
Insights
Arterial stiffness measurement devices show significant differences in aortic pulse wave velocity (PWV) due to varied distance calculations. Standardizing traveled distance measurement is recommended for consistent arterial stiffness assessment.
Area of Science:
- Cardiovascular Physiology
- Hypertension Research
- Medical Device Technology
Background:
- European hypertension guidelines recommend arterial stiffness measurement.
- Carotid-femoral pulse wave velocity (PWV) > 12 m/s indicates subclinical organ damage.
- Variations in PWV measurement techniques warrant investigation.
Purpose of the Study:
- Compare aortic PWV measurements using Complior, SphygmoCor, and Arteriograph devices.
- Assess the impact of transit time and traveled distance on PWV values.
- Evaluate device-specific methodologies in hypertension assessment.
Main Methods:
- Aortic PWV measured in 64 hypertensive patients.
- Randomized, single-visit assessment using Complior, SphygmoCor, and Arteriograph.
- Analysis of pulse wave transit time and traveled distance variations.
Main Results:
- Complior yielded significantly higher PWV (10.1 m/s) than SphygmoCor (8.1 m/s) and Arteriograph (8.6 m/s).
- No significant PWV difference between SphygmoCor and Arteriograph.
- Significant differences in traveled distance measurements between devices, not transit times.
Conclusions:
- Discrepancies in PWV measurements stem mainly from varied traveled distance calculations.
- Standardized principles for measuring traveled distance are necessary.
- Direct carotid-femoral distance is recommended due to its use in prognosis studies.
Background:
New 2007 European Society of Hypertension guidelines recommend measuring arterial stiffness in patients with arterial hypertension, suggesting a carotid-femoral pulse wave velocity over 12 m/s as an estimate of subclinical organ damage. Considering this cutoff point, it is worth exploring whether or not there are significant differences in results obtained using various techniques for measuring aortic pulse wave velocity. The aim of the study was to compare aortic pulse wave velocity measurements using Complior, SphygmoCor, and Arteriograph devices, and to assess the effect of pulse wave transit time and traveled distance on pulse wave velocity values.
Methods:
Aortic pulse wave velocity was measured on a single visit, using these devices, in randomized order, in a group of 64 patients with grade 1 or 2 arterial hypertension.
Results:
Aortic pulse wave velocity measured using Complior (10.1 +/- 1.7 m/s) was significantly higher than that obtained using SphygmoCor (8.1 +/- 1.1 m/s) or Arteriograph (8.6 +/- 1.3 m/s). No differences were noted between pulse wave velocity measurements using SphygmoCor and Arteriograph. Between-method comparison revealed that differences in traveled distance were significant: Complior versus Arteriograph [0.09 m, Confidence interval (CI): 0.08-0.12 m, P < 0.05], Complior versus SphygmoCor (0.15 m, CI: 0.13-0.16 m, P < 0.05), Arteriograph versus SphygmoCor (0.05 m, CI: 0.03-0.07 m, P < 0.05). No between-method differences were found for transit times.
Conclusion:
Differences in pulse wave velocity obtained by compared devices resulted primarily from using various methods for measuring traveled distance. It appears reasonable to establish uniform principles for the measurement of traveled distance. Because a large number of prognosis/survival studies used direct distance between carotid and femoral sites of pulse wave recording, this distance should be mostly recommended.
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