A ______ may be seen on the spectral waveform in the area of post stenotic turbulence. It appears as bright echoes near the zero baseline located underneath the systolic peak.

A ______ may be seen on the spectral waveform in the area of post stenotic turbulence. It appears as bright echoes near the zero baseline located underneath the systolic peak.

• A. Mirror imaging
• B. Bruit
• C. Aliasing
• D. Spectral broadening

Answer: (B)

Turbulent flow after a stenosis creates a chaotic mix of Doppler shifts, which on the spectral waveform appears as bright, speckled echoes near the baseline just under the systolic peak. This appearance is called bruit, and it reflects turbulent, multi-directional flow at relatively low velocities that accompany post-stenotic turbulence. Aliasing would show a wrap of high-velocity signals around the baseline due to sampling limits, not these near-baseline bright echoes. Spectral broadening describes a general widening of the spectrum from a range of velocities within the jet, which can occur with turbulence but doesn’t specifically refer to the bright near-baseline echoes under the systolic peak. Mirror imaging is a different artifact where a duplicate signal appears on the opposite side of the baseline. So the bright near-baseline echoes in this post-stenotic context are characteristic of bruit.

Turbulent flow after a stenosis creates a chaotic mix of Doppler shifts, which on the spectral waveform appears as bright, speckled echoes near the baseline just under the systolic peak. This appearance is called bruit, and it reflects turbulent, multi-directional flow at relatively low velocities that accompany post-stenotic turbulence. Aliasing would show a wrap of high-velocity signals around the baseline due to sampling limits, not these near-baseline bright echoes. Spectral broadening describes a general widening of the spectrum from a range of velocities within the jet, which can occur with turbulence but doesn’t specifically refer to the bright near-baseline echoes under the systolic peak. Mirror imaging is a different artifact where a duplicate signal appears on the opposite side of the baseline. So the bright near-baseline echoes in this post-stenotic context are characteristic of bruit.