Pulsed-wave Doppler

Pulsed-wave Doppler echocardiography uses short bursts of ultrasound with a process called range gating to facilitate signal analysis from a small area at a specified depth from the transducer. This sampling area, or sample volume, can be moved or repositioned along the path of the ultrasound beam for examination of the spatial extent of the Doppler signals in relation to the two-dimensional image - Doppler mapping. It is commonly used for assessing the diastolic function of the left ventricle by measuring the blood flow through the mitral valve in the diastolic phase. It can also be placed on the left ventricle outflow tract to obtain the stroke volume or grade an aortic stenosis. This one is placed in the left ventricular outflow tract.

Figure 1 - Example of an image obtained using pulsed-wave Doppler