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The Journal of Physiological Sciences

, Volume 64, Issue 2, pp 105–112 | Cite as

Changes in systemic and pulmonary blood flow distribution in normal adult volunteers in response to posture and exercise: a phase contrast magnetic resonance imaging study

  • Derek T. H. WongEmail author
  • Kyong-Jin Lee
  • Shi-Joon Yoo
  • George Tomlinson
  • Lars Grosse-Wortmann
Original Paper

Abstract

Hemodynamics are usually evaluated in the supine position at rest. This is only a snapshot of an individual’s daily activities. This study describes circulatory adaptation, as assessed by magnetic resonance imaging, to changes in position and exercise. Phase contrast magnetic resonance imaging of blood flow within systemic and pulmonary arteries and veins was performed in 24 healthy volunteers at rest in the prone and supine position and with bicycle exercise in the supine position. No change was seen in systemic blood flow when moving from prone to supine. Exercise resulted in an increased percentage of cardiac output towards the lower body. Changes in position resulted in a redistribution of blood flow within the left lung—supine positioning resulted in decreased blood flow to the left lower pulmonary vein. With exercise, both the right and left lower lobes received increased blood flow, while the upper lobes received less.

Keywords

Magnetic resonance imaging Phase contrast Exercise Blood flow 

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Copyright information

© The Physiological Society of Japan and Springer Japan 2013

Authors and Affiliations

  • Derek T. H. Wong
    • 1
    • 2
    Email author
  • Kyong-Jin Lee
    • 1
  • Shi-Joon Yoo
    • 1
    • 3
  • George Tomlinson
    • 4
  • Lars Grosse-Wortmann
    • 1
    • 3
  1. 1.The Labatt Family Heart Centre at the Hospital for Sick Children, Department of PaediatricsUniversity of TorontoOntarioCanada
  2. 2.Department of Pediatric Cardiology, Children’s Hospital of Eastern OntarioUniversity of OttawaOttawaCanada
  3. 3.Department of Diagnostic Imaging, Hospital for Sick ChildrenUniversity of TorontoOntarioCanada
  4. 4.Division of Clinical Decision-Making and Health Care, Toronto General Research InstituteUniversity of TorontoOntarioCanada

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