Evaluation of mitral stenosis with velocity-encoded cine-magnetic resonance imaging

Paul A. Heidenreich, Johann Steffens, Naoya Fujita, Margaret O'Sullivan, Gary R. Caputo, Elyse Foster, Charles B. Higgins

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

Velocity-encoded cine-magnetic resonance imaging (VEC-MRI) is a new method for quantitation of blood flow with the potential to measure high-velocity jets across stenotic valves. The objective of this study was to evaluate the ability of VEC-MRI to measure transmitral velocity in patients with mitral stenosis. Sixteen patients with known mitral stenosis were studied. A 1.5 Tesla superconducting magnet was used to obtain velocity-encoded images in the left ventricular short-axis plane. Images were obtained throughout the cardiac cycle at 3 consecutive slices beginning proximal to the mitral coaptation point. To determine the optimal slice thickness for MRI imaging, both 10 mm and 5 mm thicknesses were used. Echocardiography including continuous-wave Doppler was performed on every patient within 2 hours of MRI imaging. Peak velocity was determined for both VEC-MRI and Doppler-echo images. Two observers independently measured the VEC-MRI mitral inflow velocities. Of the 16 patients, imaged data were incomplete in only 1 study, and all images were adequate for analysis. Strong correlations were found for measurements of mitral valve gradient for both 10 mm (peak r = 0.89, mean r = 0.84) and 5 mm (peak r = 0.82, mean r = 0.95) slice thicknesses. Measurements of peak velocity with VEC-MRI (10 mm) agreed well with Doppler: mean 1.46 m/s, mean of differences (Doppler MRI) 0.38 m/s, standard deviation of differences 0.2 m/s. These findings suggest that VEC-MRI can noninvasively determine the severity of mitral stenosis.

Original languageEnglish (US)
Pages (from-to)365-369
Number of pages5
JournalThe American journal of cardiology
Volume75
Issue number5-6
DOIs
StatePublished - Feb 15 1995

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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    Heidenreich, P. A., Steffens, J., Fujita, N., O'Sullivan, M., Caputo, G. R., Foster, E., & Higgins, C. B. (1995). Evaluation of mitral stenosis with velocity-encoded cine-magnetic resonance imaging. The American journal of cardiology, 75(5-6), 365-369. https://doi.org/10.1016/S0002-9149(99)80555-4