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  • Title: Proximal flow convergence method in the assessment of mitral stenosis.
    Author: Muralidharan TR, Trivedi SK, Jose JJ.
    Journal: Indian Heart J; 1995; 47(5):467-9. PubMed ID: 8714499.
    Abstract:
    Mitral valve area (MVA) was calculated using the proximal flow convergence method in 60 patients with severe mitral stenosis. Using the apical 4 chamber view, colour Doppler was used to measure the peak forward flow rate. From this, the mitral valve area was calculated according to the formula: mitral valve area = peak forward flow rate/peak mitral velocity. This method compared well with the established 2D planimetry derived valve area (r = 0.89) and Doppler pressure half time method (r = 0.88). Hence, this can be used as an alternative method to estimate the valve area in patients with mitral stenosis.
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