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| Echocardiography, Doppler Doppler Echocardiography | Echocardiography, Continuous Doppler | Echocardiography, Two-Dimensional Doppler | 2-D Doppler Echocardiography | 2D Doppler Echocardiography | Continuous Doppler Echocardiography | Doppler Echocardiography, 2-D Measurement of intracardiac blood flow using an M-mode and/or two-dimensional (2-D) echocardiogram while simultaneously recording the spectrum of the audible Doppler signal (e.g., velocity, direction, amplitude, intensity, timing) reflected from the moving column of red blood cells. |