Which is NOT a type of Doppler?
The change in frequency of a sound, light or radio wave caused by the motion of the source or the observer.
The difference between the emitted frequency and the received frequency.
If the returning frequency is lower than the emitted frequency, the Doppler shift is...
There is no shift
Doppler should always be measured __________________ to flow?
Which component is NOT part of Doppler display?
The small "double lined" area on the cursor used to sample blood flow for velocity at a specific location.
Pulsed Wave Doppler uses a minimum of 2 crystals.
A major limitation of PW Doppler is the inability to measure fast blood flow.
Aliasing is dependent on this.
The main advantage of Continuous Wave Doppler is the ability to measure very slow blood flows.
The main disadvantage of CW Doppler is.
Inaccurate flow measurements
Also known as a pencil probe.
Normal A-V valve shape have an "M" shape during diastole seen above the baseline.
Semilunar valves have a "U" shape during systole below the baseline.
Pulsed Doppler showing flow with a dark center reflects what kind of flow?
Normal Tricuspid valve velocity.
0.5 - 1.1 m/sec
0.5 - 0.7 m/sec
0.3 - 1.1 m/sec
0.3 - 0.7 m/sec
Normal Pulmonic Valve velocity.
0.6 - 0.9 m/sec
0.6 - 1.1 m/sec
0.5 - 0.9 m/sec
Anything above normal velocity measurements means _______________?
Mitral & Tricuspid regurgitation is _______ shaped when chronic.
Aortic & Pulmonic Stenosis will have a ________ shape.
Which types of Doppler must you use with ALL valves?
PW & CW
PW & Color
CW & Color
This is an example of ___________________ flow?
A-V valve regurgitation
This represents what type of flow pattern?
Semilunar valve Stenosis
Normal Semilunar valve flow
A-V Valve Stenosis
Normal A-V Valve flow
Aliasing frequently occurs with which type of Doppler?