AIMS M-mode left atrioventricular plane displacement (AVPD) correlates with Tissue Doppler (TD) peak systolic annular velocity in healthy individuals. This approach is biased by several interacting factors related to the structural complexity of mitral annulus physiology, including the different dimensional values of measures, the confounding effect of isovolumic motions, and the spectral thick...

Laboratory measurements of the fine space-time structure of short gravity-capillary waves, as well as Ku-band scattering at grazing and moderate incidence from spilling and plunging breaking waves in a wave channel are presented. Unsteady breaking waves are generated by focusing the waves in space and time. A scanning laser slope gauge was used for measuring short waves of wavelength 0.2-20cm, ...

Thirty adult patients with aortic stenosis had Doppler echocardiography within 1 day of cardiac catheterization. Noninvasive measurement of the mean transaortic pressure gradient was calculated by applying the simplified Bernoulli equation to the continuous wave Doppler transaortic velocity recording. Stroke volume was measured noninvasively by multiplying the systolic velocity integral of flow...

A monochromatic plane wave recorded by an observer moving with respect to the source undergoes a Doppler shift and spatial aberration. We investigate here transformation undergone generic, paraxial, spectrally coherent quasimonochromatic optical beam (of finite transverse width) when detector. Because of space-time coupling intrinsic Lorentz transformation, is converted into propagation-invaria...

Given the importance of reproduction field combined with use Pulsed-Wave (PW) ultrasound in clinical routine, this study aims to review application diagnostic method reproductive tract females and males canine species. A narrative was carried out by using scientific articles, monographs, dissertations thesis published available online databases: Periodical Capes (Coordination for Improvement Hi...

Sensitivity and specificity of detection of mitral regurgitation was assessed by range-gated Doppler echocardiography. The degree of mitral regurgitation was also estimated by the depth and width of the regurgitant jet detected with Doppler and compared with that assessed by left ventriculography. Of 47 patients with an adequate Doppler study, 24 had no mitral regurgitation by ventriculography....

Pulmonary hypertension may occur in the fetus in the presence of constriction of the ductus arteriosus. The feasibility of detection and quantitation of fetal ductal constriction by Doppler echocardiography was assessed in an animal preparation in which ductal constriction was created in the fetal lamb with a variable ligature causing varying degrees of fetal pulmonary hypertension (fetal pulmo...