A method to quantify the valvular flow on the basis of the color Doppler data produced by echographic machines, which is able to accurately quantify the valvular flow, particularly the so called mitral regurgitation by taking an instantaneous two-dimensional color flow image of a valvular flow and evaluate the corresponding instantaneous discharge that passes through the valve; the said method comprising the following steps: reading the two-dimensional velocity data obtained by a Doppler measure, which data represent a profile of the axial component of velocity (V D); defining a symmetry axis of the velocity profile; decomposing the velocity profile into a symmetric profile and an asymmetric component which gives null contribution to the integral value of the velocity profile; considering only the symmetric velocity profile obtained by symmetrization of the original Doppler sampling; defining a cylindrical system of coordinates {r, z}, where r=0 represents the symmetry axis of the extracted symmetric velocity profile v z (r,z); using the continuity equation in the cylindrical coordinates and in its differential form for describing the relation between the axial variation of the axial component of velocity vz(r,z) and the radial component of velocity (v r): r ∂ v z ∂ z + ∂ v r ∂ r = 0 determining the radial component of velocity (v r) by integration of this equation along r, starting from the axis r=0: obtaining the velocity vector (v) from the axial component (v z) and the radial component (v r) of velocity; defining an axis-symmetric surface surrounding the valve and delimited by a plane containing the valve opening; defining a plane containing the axis of the valve; finding the imprint curve representing the intersection of the axis-symmetric surface with the said plane; determining the valvular flow passing through said axis-symmetric surface by using the equation: Q = 2 π ∫ l v n rdl where v n is the projection of the velocity vector (v) in the direction normal to the imprint curve. reading the two-dimensional velocity data obtained by a Doppler measure, which data represent a profile of the axial component of velocity (V D); defining a symmetry axis of the velocity profile; decomposing the velocity profile into a symmetric profile and an asymmetric component which gives null contribution to the integral value of the velocity profile; considering only the symmetric velocity profile obtained by symmetrization of the original Doppler sampling; defining a cylindrical system of coordinates {r, z}, where r=0 represents the symmetry axis of the extracted symmetric velocity profile v z (r,z); using the continuity equation in the cylindrical coordinates and in its differential form for describing the relation between the axial variation of the axial component of velocity vz(r,z) and the radial component of velocity (v r): r ∂ v z ∂ z + ∂ v r ∂ r = 0 obtaining the velocity vector (v) from the axial component (v z) and the radial component (v r) of velocity; defining an axis-symmetric surface surrounding the valve and delimited by a plane containing the valve opening; defining a plane containing the axis of the valve; finding the imprint curve representing the intersection of the axis-symmetric surface with the said plane; determining the valvular flow passing through said axis-symmetric surface by using the equation: Q = 2 π ∫ l v n rdl where v n is the projection of the velocity vector (v) in the direction normal to the imprint curve.