title: Proximal flow convergence method in the assessment of mitral stenosis.
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.
authors.affiliation: Christian Medical College Hospital, Vellore.
authors.forename: T R
authors.initials: TR
authors.lastname: Muralidharan
authors.forename: S K
authors.initials: SK
authors.lastname: Trivedi
authors.forename: J J
authors.initials: JJ
authors.lastname: Jose
mesh_terms: D018618:Echocardiography, Doppler, Color / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008946:Mitral Valve Stenosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D015588:Observer Variation