About Video

This video clip two-dimensional intraventricular flow analysis from an apical long-axis view with a small amount of echo contrast agent (Definity), imaged with harmonic frequencies that have been tracked over time using echo-specific particle imaging velocity software. Direction and relative speed of the contrast agent is displayed as vectors. The resulting patterns represent blood motion in two dimensions in the left ventricle. This differs from color Doppler assessment, which is only one-dimensional. This kinetic circular motion of blood in the ventricle is referred to as vorticity.