Quantification of aortic regurgitation by magnetic resonance velocity mapping

Lars Søndergaard*, Knud Lindvig, Per Hildebrandt, Carsten Thomsen, Freddy Ståhlberg, Tomas Joen, Ole Henriksen

*Corresponding author af dette arbejde

    Publikation: Bidrag til tidsskriftArtikelpeer review

    Abstract

    The use of magnetic resonance (MR) velocity mapping in the quantification of aortic valvular blood flow was examined in 10 patients with angiographically verified aortic regurgitation. MR velocity mapping succeeded in identifying and quantifying the regurgitation in all patients, and the regurgitant volume determined with MR velocity mapping agreed well with the grade obtained by aortic root angiography (p < 0.02). The accuracy in quantification of the aortic valvular flow rate was demonstrated by a significant correlation between the stroke volume (ml) measured by MR velocity mapping and calculated from MR imaging of the left ventricular end-diastolic and end-systolic volumes in eight patients (Y = 0.89 · X + 11, r = 0.97, p < 0.001). This finding was confirmed by a good agreement between the net cardiac output (L/min) quantified with MR velocity mapping and simultaneous 125I-indicator dilution measurement in all subjects (Y = 0.89 · X + 0.08, r = 0.82, p < 0.01). In conclusion, MR velocity mapping may be used as a noninvasive tool in the quantification of aortic regurgitation.

    OriginalsprogEngelsk
    Sider (fra-til)1081-1090
    Antal sider10
    TidsskriftAmerican heart journal
    Vol/bind125
    Udgave nummer4
    DOI
    StatusUdgivet - apr. 1993

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