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Titolo:
Three dimensional flow in the human left atrium
Autore:
Fyrenius, A; Wigstrom, L; Ebbers, T; Karlsson, M; Engvall, J; Bolger, AF;
Indirizzi:
Univ Calif San Francisco, Dept Med, San Francisco, CA 94110 USA Univ CalifSan Francisco San Francisco CA USA 94110 ancisco, CA 94110 USA Linkoping Univ, Dept Med & Care, S-58183 Linkoping, Sweden Linkoping UnivLinkoping Sweden S-58183 Care, S-58183 Linkoping, Sweden Linkoping Univ, Dept Biomed Engn, S-58183 Linkoping, Sweden Linkoping Univ Linkoping Sweden S-58183 Engn, S-58183 Linkoping, Sweden
Titolo Testata:
HEART
fascicolo: 4, volume: 86, anno: 2001,
pagine: 448 - 455
SICI:
1355-6037(200110)86:4<448:TDFITH>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
PULMONARY VENOUS FLOW; TRANSESOPHAGEAL ECHOCARDIOGRAPHY; LEFT-VENTRICLE; MITRAL-STENOSIS; CONTRAST; PATTERNS; DOPPLER; MR; FIBRILLATION; VALVE;
Keywords:
atrium; blood flow; magnetic resonance imaging; haemodynamics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Bolger, AF Univ Calif San Francisco, Dept Med, 1001 Potrero Ave 5G1, San Francisco, CA 94110 USA Univ Calif San Francisco 1001 Potrero Ave 5G1 San Francisco CA USA 94110
Citazione:
A. Fyrenius et al., "Three dimensional flow in the human left atrium", HEART, 86(4), 2001, pp. 448-455

Abstract

Background-Abnormal flow patterns in the left atrium in atrial fibrillation or mitral stenosis are associated with an increased risk of thrombosis and systemic embolisation; the characteristics of normal atrial flow that avoid stasis have not been well defined. Objectives-To present a three dimensional particle trace visualisation of normal left atrial flow in vivo, constructed from flow velocities in three dimensional space. Methods-Particle trace visualisation of time resolved three dimensional magnetic resonance imaging velocity measurements was used to provide a display of intracardiac flow without the limitations of angle sensitivity or restriction to imaging planes. Global flow patterns of the left atrium were studied in I I healthy volunteers. Results-In all subjects vortical flow was observed in the atrium during systole and diastolic diastasis (mean (SD) duration of systolic vortex, 280 (77) ins; and of diastolic vortex, 256 (118) ms). The volume incorporated and recirculated within the vortices originated predominantly from the left pulmonary veins. Inflow from the right veins passed along the vortex periphery, constrained between the vortex and the atrial wall. Conclusions-Global left atrial flow in the normal human heart comprises consistent patterns specific to the phase of the cardiac cycle. Separate paths of left and right pulmonary venous inflow and vortex formation may have beneficial effects in avoiding left atrial stasis in the normal subject in sinus rhythm.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 13:03:32