Echocardiography Imaging Techniques Flashcards
7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning โ missed cards come back until you master them.
Read the first 7 Echocardiography Imaging Techniques flashcards as text
In color flow Doppler imaging, the color scale or Nyquist limit should be set to:
Answer: Slightly below the expected peak velocity of the flow being interrogated
Setting the Nyquist limit slightly below the expected peak velocity maximizes color sensitivity while minimizing aliasing artifacts for the flow of interest.
Which of the following best describes the advantage of real-time three-dimensional (3D) echocardiography over conventional 2D imaging?
Answer: Volumetric acquisition allowing visualization of complex anatomy without geometric assumptions
3D echocardiography acquires a pyramidal volume of data, enabling accurate measurement of chamber volumes and valve morphology without relying on geometric models.
During a stress echocardiogram, new wall motion abnormalities induced by exercise or pharmacologic stress indicate:
Answer: Myocardial ischemia in the territory supplied by a stenotic coronary artery
New regional wall motion abnormalities appearing during stress reflect inducible ischemia caused by inadequate perfusion from a flow-limiting coronary stenosis.
The 'hockey stick' deformity of the anterior mitral valve leaflet seen on 2D echocardiography is characteristic of:
Answer: Rheumatic mitral stenosis
Rheumatic mitral stenosis causes fibrosis and fusion of the leaflet tips with preserved mobility at the base, producing the classic hockey stick or 'dog leg' deformity of the anterior leaflet.
Which adjustment should be made when a Doppler spectral signal shows aliasing (velocity wrapping) in pulsed-wave mode?
Answer: Increase the velocity scale or switch to continuous-wave Doppler
Aliasing in PW Doppler occurs when the velocity exceeds the Nyquist limit; increasing the scale or using CW Doppler (which has no aliasing limit) corrects this.
In intracardiac echocardiography (ICE), the transducer is typically advanced through which vessel to reach the right atrium?
Answer: Femoral vein
The ICE catheter is introduced via the femoral vein and advanced into the right atrium, providing direct intracardiac imaging without the need for general anesthesia.
When optimizing 2D image quality, narrowing the sector width (image width) will:
Answer: Increase frame rate by requiring fewer scan lines per frame
A narrower sector requires fewer scan lines to fill the image, allowing the system to complete each frame faster and thus increasing the frame rate.