Practice Test Geeks(CET) Certified Echocardiography Technician Practice Test
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Doppler Echocardiography & Spectral Analysis Flashcards

7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Doppler Echocardiography & Spectral Analysis flashcards as text

  1. Which Doppler pattern at the mitral valve is consistent with Grade I (impaired relaxation) diastolic dysfunction?

    Answer: E/A 220 ms)

    Grade I diastolic dysfunction (impaired relaxation) shows E/A ratio <1 and prolonged deceleration time due to slow myocardial relaxation.

  2. The velocity-time integral (VTI) obtained by tracing the spectral Doppler envelope is used to calculate:

    Answer: Stroke volume when multiplied by cross-sectional area

    VTI represents the distance blood travels per beat; multiplied by the cross-sectional area (e.g., LVOT), it yields stroke volume.

  3. In color M-mode Doppler, the propagation velocity (Vp) of early diastolic inflow is used to:

    Answer: Estimate left ventricular relaxation and filling pressure

    Color M-mode propagation velocity (Vp) reflects the speed of early diastolic inflow into the LV; Vp <45 cm/s suggests impaired relaxation and elevated filling pressures.

  4. The dP/dt measurement in mitral regurgitation is obtained by measuring the time for the MR jet velocity to increase from:

    Answer: 1 m/s to 3 m/s on the continuous-wave Doppler envelope

    LV dP/dt is calculated as 32 mmHg (the pressure difference between 1 m/s [4 mmHg] and 3 m/s [36 mmHg]) divided by the time interval between those two velocities on the MR CW Doppler trace.

  5. Which of the following correctly describes how to avoid underestimation of a stenotic valve gradient by Doppler?

    Answer: Align the Doppler beam as parallel as possible to the direction of flow

    Doppler velocity measurement is angle-dependent; the cosine of the angle approaches 1 only when the beam is parallel to flow, so alignment minimizes velocity underestimation.

  6. A hepatic vein Doppler recording showing prominent systolic flow reversal is most consistent with:

    Answer: Severe tricuspid regurgitation

    Severe tricuspid regurgitation causes retrograde systolic flow from the right atrium into the hepatic veins, producing prominent systolic flow reversal on hepatic vein Doppler.

  7. When performing a continuous-wave Doppler assessment of aortic stenosis from the apical window, the spectral envelope has a characteristic shape. Which feature indicates the peak gradient?

    Answer: The peak velocity at the apex of the Doppler waveform

    The peak velocity at the top of the CW Doppler waveform is used in the Bernoulli equation (ΔP = 4V²) to calculate the peak instantaneous gradient across the aortic valve.