Figure 33-2 Color Doppler aliasing depicting turbulent flow. In this echocardiogram, color Doppler reveals aliasing caused by severe mitral regurgitation: a broad-based systolic color jet emanating from the mitral valve and extending far into the left atrium. This jet is composed of a mosaic of colors mixed in a seemingly random, point-by-point fashion because the jet results from the turbulent flow of mitral regurgitation. Turbulence is never normal in the heart, and thus mosaic jets such as the one shown here are highly valuable diagnostic signs of underlying pathology. LA, left atrium; LV, left ventricle; LVOT, left ventricular outflow tract. (From Cahalan MK: Intraoperative Transesophageal Echocardiography. An Interactive Text and Atlas. New York, Churchill Livingstone, 1997.)