Registered Physician In Vascular Interpretation (RPVI) Practice Exam

Minimal spectral broadening in minimal stenosis is:

Minimal Spectral Broadening Moderate Spectral Broadening Severe Spectral Broadening No Spectral Broadening

Correct Answer:

Minimal Spectral Broadening

Explanation:

When stenosis is minimal, the flow through the vessel stays largely laminar, with only a small acceleration through the narrowed segment. This produces only a tiny spread of velocities within the sample volume, seen on the Doppler spectrum as minimal spectral broadening. As stenosis worsens, turbulence increases and spectral broadening becomes moderate to severe. No spectral broadening would imply an almost perfectly mono-velocity flow, which is not typical even with minimal narrowing. Therefore, the best description for minimal stenosis is minimal spectral broadening.

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