Case Studies In Small Animal

Cardiovascular Medicine

Home Up .    Radiographs ECG 2D Echo M-Mode Color Flow Doppler Diagnosis

Case 10

Color Flow Doppler Echocardiography

color.jpg (26736 bytes)

This color flow Doppler image shows a large color jet projecting in systole into the left atrium. Flow initially starts in the left ventricle (LV) as laminar flow that flows away from the transducer (blue). It accelerates as it approaches the mitral valve and becomes a mosaic of colors as it achieves high velocity when it passes through the orifice in the mitral valve. The jet wraps around in the left atrium. It first projects toward the left side of the left atrium, then wraps around the roof (top) of the left atrium to end up in the markedly enlarged pulmonary vein seen in the two-dimensional echocardiogram previously. The middle of the jet looks like there is no blood flow or there is some laminar flow going toward the transducer (red). This is an artifact of color flow physics. When red cells are flowing perpendicular to the ultrasound beam, the red cell velocity looks like it is zero, hence the appearance on the image.

Video clip of a color flow Doppler echocardiogram from another Dalmatian with the same disease as "Manny"

 

Mark D. Kittleson, D.V.M., Ph.D. All rights reserved.