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Echocardiography

M-Mode & Doppler

QuestionAnswer
What is M-Mode? multiple US pulses are sent out along a single line & displayed in a graph
What does the Y axis represent on M-Mode? distance from transducer
What does the X axis represent on M-Mode? time
Why is M-Mode useful? has high temporal resolution & shows change by the minute
What is M-Mode used for? measurements of chamber size & wall thickness
What window & view are typically used for M-Mode? parasternal long axis
Optimal 2D images are obtained with the US beam ______to the structure. perpendicular
Optimal color & doppler images are obtained with the US beam _______ to the flow. parallel
Which views are best for alignment with flow through the MV, TV, & AV? apical views
Which views are best for alignment with flow through the PV & TV? parasternal short axis
What is color flow doppler used to determine? velocity, turbulence, & direction of blood flow
What do the colors red, blue, & mosaic mean in color flow doppler? red is toward the transducer, blue is away from the transducer, & mosaic means turbulence or high velocity
What is the Doppler principle? the frequency & wavelength of transmitted sound from the transducer will NOT change as long as the transducer & reflector are not moving
What is the Doppler shift? when the transmitted frequency encounters moving blood, the reflected frequency is no longer equal to the transmitted frequency
If blood is moving away from the transducer, where will it show in relation to the baseline? below the baseline
If blood is moving toward the transducer, where will it show in relation to the baseline? above the baseline
Is color doppler quantitative or qualitative? qualitative
Which type of doppler only measures flow at a specific sample gate? pulsed wave
Which type of doppler measures flow along the entire line of interrogation? continuous wave
Which type of doppler is location specific & depth dependent? pulsed wave
Which type of doppler has range ambiguity? continuous wave
Which type of doppler measures low velocity & high amplitude motion? tissue doppler
Created by: ginaliane
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