Noninvasive assessment of pulmonary arterial hypertension by MR phase-mapping method

Citation
E. Laffon et al., Noninvasive assessment of pulmonary arterial hypertension by MR phase-mapping method, J APP PHYSL, 90(6), 2001, pp. 2197-2202
Citations number
18
Categorie Soggetti
Physiology
Journal title
JOURNAL OF APPLIED PHYSIOLOGY
ISSN journal
87507587 → ACNP
Volume
90
Issue
6
Year of publication
2001
Pages
2197 - 2202
Database
ISI
SICI code
8750-7587(200106)90:6<2197:NAOPAH>2.0.ZU;2-5
Abstract
We describe a magnetic resonance (MR) imaging method that emphasizes pressu re wave velocity to noninvasively assess pulmonary arterial hypertension. B oth the blood flow and the corresponding vessel cross-sectional area (CSA) were measured by MR phase mapping in the main pulmonary artery (MPA) in 15 patients. MPA pressures were also measured, in the same patients, by right- side heart catheterization. Two significant relationships were established: 1) between the pressure wave velocity in the MPA and the mean pressure in the MPA (Ppa) writing pressure wave velocity = 9.25 Ppa - 202.51 (r = 0.82) and 2) between the ratio of pressure wave velocity to the systolic blood v elocity peak in the MPA (R) and the mean pressure in the MPA writing R = 0. 68 Ppa - 4.33 (r = 0.89). Using these relationships, we estimated two press ure values to frame the actual Ppa value in each patient from the present s eries with a reasonable reliability percentage (87%).