• AJR Am J Roentgenol · Aug 2006

    MRI Measurement of the hemodynamics of the pulmonary and systemic arterial circulation: influence of breathing maneuvers.

    • Sebastian Ley, Christian Fink, Michael Puderbach, Julia Zaporozhan, Christian Plathow, Monika Eichinger, Waldemar Hosch, Karl-Friedrich Kreitner, and Hans-Ulrich Kauczor.
    • Department of Radiology (E010), German Cancer Research Center, (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany. ley@gmx.de
    • AJR Am J Roentgenol. 2006 Aug 1; 187 (2): 439-44.

    ObjectiveThe purpose of this study was to use phase-contrast MRI to evaluate the influence of various breathing maneuvers on the hemodynamics of the pulmonary and systemic arterial circulation.Subjects And MethodsTwenty-five volunteers were examined with phase-contrast MRI. Flow measurements were acquired in the aorta, pulmonary trunk, and left and right pulmonary arteries during deep, large-volume inspiratory breath-hold, expiratory breath-hold, and smooth respiration (no breath-hold). Parameters assessed were peak velocity, blood flow, velocity gradient, and acceleration time.ResultsPulmonary blood flow and peak velocity were significantly reduced during inspiratory breath-hold and expiratory breath-hold compared with no breath-hold (p < 0.01). Pulmonary velocity gradient in inspiratory breath-hold was significantly (p ConclusionMeasurements during smooth respiration showed the smallest SD. Therefore, no-breath-hold measurements should be considered for assessment of hemodynamics in clinical practice.

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