Imaging of wavefront propagation of rapid velocity components in heart wall at end-systole

In this paper, the measured "rapid motion" includes components with minute amplitude on the order of several tens of micrometers up to several hundred Hertz, which has not been recognized in standard M-mode echocardiography, B-mode echocardiography, nor in conventional tissue Doppler imaging (TDI). By employing multiple 1-D configurations, each of which shows the axial component along the ultrasonic beam with fast acquisition intervals, the 2-D spatial distribution of the rapid velocity components is continuously obtained on the cross-sectional 2-D image.