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Titolo:
Tuning of pulmonary arterial circulation evidenced by MR phase mapping in healthy volunteers
Autore:
Laffon, E; Bernard, V; Montaudon, M; Marthan, R; Barat, JL; Laurent, F;
Indirizzi:
Hop Haut Leveque, Nucl Med Serv, F-33604 Pessac, France Hop Haut Leveque Pessac France F-33604 Med Serv, F-33604 Pessac, France Hop Haut Leveque, Serv Cardiol, F-33604 Pessac, France Hop Haut Leveque Pessac France F-33604 v Cardiol, F-33604 Pessac, France Hop Haut Leveque, Serv Radiol, F-33604 Pessac, France Hop Haut Leveque Pessac France F-33604 rv Radiol, F-33604 Pessac, France Univ Bordeaux 2, Lab Physiol Cellulaire Resp, F-33076 Bordeaux, France Univ Bordeaux 2 Bordeaux France F-33076 e Resp, F-33076 Bordeaux, France
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 2, volume: 90, anno: 2001,
pagine: 469 - 474
SICI:
8750-7587(200102)90:2<469:TOPACE>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-RESONANCE; FLOW QUANTIFICATION; HYPERTENSION; VALIDATION; WAVES;
Keywords:
magnetic resonance; right cardiovascular system; velocity-encoded MRI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Laffon, E Hop Haut Leveque, Nucl Med Serv, F-33604 Pessac, France Hop HautLeveque Pessac France F-33604 F-33604 Pessac, France
Citazione:
E. Laffon et al., "Tuning of pulmonary arterial circulation evidenced by MR phase mapping in healthy volunteers", J APP PHYSL, 90(2), 2001, pp. 469-474

Abstract

Magnetic resonance (MR) phase mapping was used to noninvasively assess both blood flow and cross-sectional area (CSA) in the main pulmonary artery (MPA) of 12 healthy volunteers. Flow and CSA patterns exhibited two positive peaks: high systolic and small diastolic. This finding can be explained using a simple "distributed" theoretical model that takes into account the role of a reflected pressure wave from pulmonary vascular impedance in generating a diastolic flow. The mean reflection coefficient of pressure wave, MPAinput impedance, and pulmonary vascular impedance were assessed. We verified, in this series, that pressure wave velocity appears to be age-dependent. MR phase mapping has been used to observe the tuning (resonance) of the right cardiovascular system at rest under physiological conditions. MR phasemapping could be used to assess pathological modifications of the tuning that occurs in cases of pulmonary arterial hypertension.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/01/20 alle ore 07:36:08