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Cardiac Doppler

A Review

Cardiac Non-Invasive Laboratory, Tufts New England Medical Center, Boston, MA 02114.

Doppler echocardiography, when used alone and in conjunction with two-dimensional echocardiography, provides information pertaining to intracardiac blood flow dynamics. Pulsed Doppler techniques have the ability to localize intracardiac blood flow velocity patterns. This allows for the interrogation of specific cardiac chambers for both normal and abnormal flow. Disorders such as intracardiac shunts, valvular regurgitation, and stenotic lesions can be detected and evaluated with this technique. The location, duration, and timing of flow velocity information can be assessed, allowing diagnoses to be made with this technique that could not be made with imaging alone. Continuous-wave Doppler allows for evaluation of maximal velocity information, which can be used to quantitate intracardiac pressure information such as the gradient across a stenotic valve or the pressure drop across a regurgitant valve. A new twodimensional color flow mapping system provides a noninvasive method for evaluating intracardiac blood flow in ways that previously could only be accomplished through the use of angiographic techniques. This technique has shown promise in allowing evaluation of blood flow dynamics never before available with noninvasive techniques. When combined with two-dimensional echocardiography, Doppler echocardiographic techniques provide information which allow for a more complete and accurate noninvasive evaluation of cardiovascular disorders.

Key Words: Doppler echocardiography • valvular stenosis • valvular regurgitation • septal defect • intracardiac blood flow

Journal of Diagnostic Medical Sonography, Vol. 2, No. 4, 183-204 (1986)
DOI: 10.1177/875647938600200401


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