title: [Use of Doppler ultrasound in cardiac diagnosis].
abstract: In cardiac diagnosis Doppler ultrasound provides quantitative data in the assessment of pressure gradient and valve area in stenotic lesions. In atrioventricular valves pressure half-time can be determined. In regurgitant lesions the only method capable of providing quantitative analysis of aortic regurgitation is calculation of forward-to-reverse flow ratio by multigate Doppler. All the other single-gate Doppler or 2-D-echo Doppler methods, such as LV or LA mapping, recording of impaired mitral flow and diastolic/systolic flow ratio, permit only semiquantitative assessment of regurgitant volumes. Finally, semiquantitative analysis of shunt volumes appears possible in children.
mesh_terms: D002648:Child; D004452:Echocardiography / Q000295:instrumentation / Q000379:methods*; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006343:Heart Septal Defects / Q000175:diagnosis; D006349:Heart Valve Diseases / Q000175:diagnosis; D006350:Heart Valve Prosthesis; D006801:Humans; D007231:Infant, Newborn; D014465:Ultrasonics
vernacular_title: Die Anwendung von Doppler-Ultraschall in der Herzdiagnostik.