Direct and indirect quantification of mitral regurgitation with cardiovascular magnetic resonance, and the effect of heart rate variability.
OBJECT: Quantifying mitral regurgitation with cardiovascular magnetic resonance (CMR) involves indirect calculation, which increases the potential for error. We examined a direct quantification method using velocity mapping across the mitral valve, which may be less susceptible to error, and also examined the effect of heart rate variability on both techniques. MATERIALS AND METHODS: Fifty-five patients underwent mitral regurgitation quantification with CMR by the direct method and two indir...Expand abstract
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