1. Detection of aortic insufficiency by pulse Doppler echocardiography;Ward, J.M.; Baker, D.W.; Rubenstein, S.A.; Johson, S.L.;JCU,1977
2. Noninvasive diagnosis of aortic and mitral valve disease with pulsed-Doppler spectral analysis;Richards, K.L.; Cannon, SR, Crawford; MH, Sorensen; S.G.;Am; before they are attributed to cardiopulmonary Cardiol 1983; 51,J
3. Pulsed The signals have two important properties. The Doppler echocardiographic detection of right-sided first is velocity, which may reflect a retrograde transpulmonary pressure difference during diastole. In healthy individuals the transpulmonary pressure gradient is small in diastole. Maximal velocity was < 1-5;Waggoner, A.P.; Quinones, R.M.A.; Young, J.B.;Am J Cardiol; and this is consistent with the normal retrograde transpulmonvalve regurgitation,1981
4. Pulmonary regurgitation studied with the ultrasonic pulsed Doppler technique;Miyatake, K.; Okamoto, M.; Kinoshita, N.;Circulation,1982
5. Clinical applications of a new type of real-time twodimensional Doppler flow imaging system;Miyatake, K.; Okamoto, M.; Kinoshita, N.;Am; ary pressure difference expected of < 4 x 1.52,1984