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Three-dimensional flow in the human left atrium

Fyrenius, Anna (author)
Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet
Wigström, Lars (author)
Östergötlands Läns Landsting,Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet,Fysiologiska kliniken
Ebbers, Tino (author)
Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet
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Karlsson, Matts (author)
Linköpings universitet,Biomedicinsk modellering och simulering,Tekniska högskolan
Engvall, Jan (author)
Östergötlands Läns Landsting,Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet,Fysiologiska kliniken
Bolger, Ann F. (author)
Östergötlands Läns Landsting,Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet,Fysiologiska kliniken
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 (creator_code:org_t)
BMJ, 2001
2001
English.
In: Heart. - : BMJ. - 1355-6037 .- 0007-0769. ; 86:4, s. 448-455
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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 11 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) ms; 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.

Keyword

atrium
blood flow
magnetic resonance imaging
haemodynamics
MEDICINE
MEDICIN

Publication and Content Type

ref (subject category)
art (subject category)

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