Pulse and Continuous Wave Doppler Flashcards

Flashcards about Pulse and Continuous wave Doppler

Pulse Wave Doppler

A range-specific form of Doppler where the machine intermittently pulses an ultrasound beam.

Nyquist Limit

The limit with which the pulse wave velocities will alias over from one side of the baseline to the other.

Increase Pulse Repetition Frequency

To increase the Nyquist limit.

Stroke Volume

Area multiplied by the Time Velocity Integral.

LVOT Diameter Measurement

Inner edge to inner edge measurement at mid systole when the LVOT is the largest.

Pulsus Alternans

Variations in beat strength due to differences in calcium release at the sarcomere level.

Continuous Wave Doppler

Ultrasound beam is constantly sending and receiving data back.

Pressure Half-Time

The time interval required for the pressure gradient to be reduced to half.

Pressure Half-Time

Equal to 0.29 times the deceleration time.

Deceleration Time

Time from the peak signal down to the baseline.

Think Something is Wrong

When E velocity is greater than 2.4 on a mitral prosthetic valve.