Key points are not available for this paper at this time.
A new technique using pulsed Doppler echocardiography for non-invasive recording of blood flow velocity patterns at the site of the mitral annulus is described. In a control group of 30 subjects in whom an organic or 'Partly supported by a grant of I.N.S.E.R.M. (C.N.A.M.
Kalmanson et al. (1977) studied this question.