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Effect of Nyquist limit and color gain on color Doppler signals

by Nanda Navin C

Comprehensive Textbook of Echocardiography

by Navin C Nanda

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In this video, the color gain is unchanged at 50 units but the Nyquist limit has been increased to 69 cm/s. Any change in the Nyquist limit also alters the color wall filter and this results in considerable decrease in the jet area. Thus, the severity of regurgitation can be underestimated when the Nyquist limit is increased above the standardized range.

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Effect of Nyquist limit and color gain on color Doppler signals

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