Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Arterial pressure transfer characteristics: effects of travel time
 
research article

Arterial pressure transfer characteristics: effects of travel time

Westerhof, Berend E
•
Guelen, Ilja
•
Stok, Wim J
Show more
2006
American journal of physiology. Heart and circulatory physiology

We investigated the quantitative contribution of all local conduit arterial, blood, and distal load properties to the pressure transfer function from brachial artery to aorta. The model was based on anatomical data, Young's modulus, wall viscosity, blood viscosity, and blood density. A three-element windkessel represented the distal arterial tree. Sensitivity analysis was performed in terms of frequency and magnitude of the peak of the transfer function and in terms of systolic, diastolic, and pulse pressure in the aorta. The root mean square error (RMSE) described the accuracy in wave-shape prediction. The percent change of these variables for a 25% alteration of each of the model parameters was calculated. Vessel length and diameter are found to be the most important parameters determining pressure transfer. Systolic and diastolic pressure changed <3% and RMSE <1.8 mmHg for a 25% change in vessel length and diameter. To investigate how arterial tapering influences the pressure transfer, a single uniform lossless tube was modeled. This simplification introduced only small errors in systolic and diastolic pressures (1% and 0%, respectively), and wave shape was less well described (RMSE, approximately 2.1 mmHg). Local (arm) vasodilation affects the transfer function little, because it has limited effect on the reflection coefficient. Since vessel length and diameter translate into travel time, this parameter can describe the transfer accurately. We suggest that with a, preferably, noninvasively measured travel time, an accurate individualized description of pressure transfer can be obtained.

  • Details
  • Metrics
Type
research article
DOI
10.1152/ajpheart.00443.2006
PubMed ID

16963619

Author(s)
Westerhof, Berend E
Guelen, Ilja
Stok, Wim J
Wesseling, Karel H
Spaan, Jos A E
Westerhof, Nico
Bos, Willem Jan
Stergiopulos, Nikos  
Date Issued

2006

Published in
American journal of physiology. Heart and circulatory physiology
Volume

292

Issue

2

Start page

H800

End page

7

Subjects

Blood Flow Velocity

•

Blood Pressure

•

Models, Cardiovascular

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LHTC  
Available on Infoscience
December 16, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/62252
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés