Premium
Estimation of local aortic elastic properties with MRI
Author(s) -
Vulliémoz Serge,
Stergiopulos Nikos,
Meuli Reto
Publication year - 2002
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.10100
Subject(s) - pulse wave velocity , pulse (music) , ascending aorta , systole , cardiology , pulse pressure , compliance (psychology) , medicine , cardiac cycle , aorta , peripheral , blood pressure , physics , diastole , social psychology , detector , optics , psychology
Aortic compliance and pulse wave velocity (PWV) are important determiners of heart load, and are clinically useful indices of cardiovascular risk. Most direct methods to derive them require invasive pressure measurement. In this work a noninvasive technique to evaluate aortic compliance and PWV using MRI is proposed. MRI magnitude and phase images to measure area and flow in the ascending aorta were acquired in a group of 13 young healthy subjects. Assuming that the early systolic part of the wave was unidirectional and reflectionless, PWV was determined as the ratio between flow and area variations at early systole. Our results were compared to pulse wave velocities derived from a direct transit time, and to one using ascending aortic area and peripheral brachial pulse pressure. The new method proved to be accurate and in good agreement with the transit time method, as well as with previously published results. Magn Reson Med 47:649–654, 2002. © 2002 Wiley‐Liss, Inc.