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What is a Doppler Examination?

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Doppler is a special part of the ultrasound examination that assess blood flow (direction and velocity). In contrast, the M-mode and 2-D Echo evaluates the size, thickness and movement of heart structures (chambers, valves, etc.).

During the Doppler examination, the ultrasound beams will evaluate the flow of blood as it makes it way through and out of the heart. This information is presented visually on the monitor (as colour images and also as a series of audible signals with a swishing or pulsating sound)