ISSN: 1305-385X
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Doppler Echocardiography
Dr. Berrin UMMANa
aKardiyoloji AD, İstanbul Üniversitesi İstanbul Tıp Fakültesi, İSTANBUL
Doppler imaging is an integral and indispensable part of the echocardiographic examination. Although Doppler imaging can be regarded as being complemantary to two-dimensional imaging, the principles and instrumentation underlying this technique are substantially different.
Whereas two-dimentional structural imaging relies on analysis of intensity of a returning ultrasound signal to identify an anatomic structure, Doppler interrogation relies on analysis of a change in the frequency of the transmitted ultrasound. Doppler imaging is concerned with the direction, velocity and pattern of blood flow through the heart and great vessels, primary target is the red blood cells and records velocity rather than flow.
For cardiovascular applications, there are five basic types of Doppler techniques: pulsed wave Doppler, continuous wave Doppler, color flow imaging, tissue Doppler and duplex scanning.
Echocardiography, “pulsed wave”, “continuous wave” Doppler and color flow imaging provide diagnostic data that are largely complemantary. It is possible to evaluate systolic and diastolic function, valvular function, quantify blood flow, measure pressure gradients, estimate intracardiac pressures.Keywords: Cardiac imaging, doppler echocardiographyTurkiye Klinikleri J Int Med Sci 2005, 1(42):39-50
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