Real-time--directed M-mode echocardiography: a new technique for accurate and rapid quantitation of the fetal preejection period and ventricular ejection time of the right and left ventricles.
作者信息
DeVore G R, Donnerstein R L, Kleinman C S, Hobbins J C
出版信息
Am J Obstet Gynecol. 1981 Oct 15;141(4):470-1. doi: 10.1016/0002-9378(81)90617-7.